MySQL 5.7 SYS scheme解析

sys 库是MySQL 5.7其中的一个系统库，里面有很多很好用的跟性能相关的视图、函数和存储过程， 增强MySQL的易用性

例如：哪些语句使用了临时表，哪个用户请求了最多的io，哪个线程占用了最多的内存，哪些索引是没有使用过的索引。

有了sys 库以后，5.7分析问题和定位问题，减少依赖percona-toolkit工具，更多的使用里面的视图。下面我们做个实验，来看sys库那几个性能视图的作用

环境介绍：

192.168.23.10 安装sysbench

192.168.23.12 安装MySQL5.7.13

两台虚拟机，都是4线程，3G内存，宿主机是4核，16G内存，普通SATA盘

sysbench压测脚本，为了做实验，把压测时间设置大一点，方便查看那几个性能视图

/opt/app/sysbench/bin/sysbench --test=/opt/app/sysbench/lua/oltp.lua \

--db-driver=mysql --mysql-host=192.168.23.12 --oltp-table-size=100000 \

--oltp-tables-count=10 --mysql-db=sysbench --mysql-user=sysbench \

--mysql-password=1qaz2wsx --max-time=30000 --max-requests=0 \

--num-threads=8 --report-interval=1 run

第一：查看用户级别的相关情况，

##看一下host发来过的SQL请求情况
mysql> select * from x$host_summary_by_statement_latency;
+---------------+--------+-----------------+---------------+----------------+-----------+---------------+---------------+------------+
| host          | total  | total_latency   | max_latency   | lock_latency   | rows_sent | rows_examined | rows_affected | full_scans |
+---------------+--------+-----------------+---------------+----------------+-----------+---------------+---------------+------------+
| 192.168.23.10 | 200669 | 560038986996000 | 8997005086000 | 23331049000000 |   3120190 |       7153244 |         40115 |          0 |
| localhost     |    109 |   2130722779000 |  712619558000 |    90944000000 |       119 |          1269 |             0 |          5 |
| background    |      0 |               0 |             0 |              0 |         0 |             0 |             0 |          0 |
+---------------+--------+-----------------+---------------+----------------+-----------+---------------+---------------+------------+
3 rows in set (0.01 sec)

##查看host相关IO相关的情况
mysql> select * from x$waits_by_host_by_latency order by total_latency desc ;
+---------------+--------------------------------------+---------+-----------------+-------------+---------------+
| host          | event                                | total   | total_latency   | avg_latency | max_latency   |
+---------------+--------------------------------------+---------+-----------------+-------------+---------------+
| 192.168.23.10 | wait/io/file/sql/binlog              |   24841 | 163211274405180 |  6570237410 |  913839905965 |
| 192.168.23.10 | wait/io/table/sql/handler            | 6244558 |  88270585548280 |    14135530 | 3369646613620 |
| background    | wait/io/file/sql/binlog              |  128486 |  44014622163915 |   342563495 | 3842357737710 |
| background    | wait/io/file/innodb/innodb_data_file |    1846 |  14855266117140 |  8047272805 |  882840258320 |
| background    | wait/io/file/innodb/innodb_log_file  |     547 |  13470228043550 | 24625645405 | 1777250192660 |
| 192.168.23.10 | wait/io/file/innodb/innodb_data_file |     584 |  11086987247300 | 18984567010 |  380929741155 |
| 192.168.23.10 | wait/io/file/innodb/innodb_log_file  |   13877 |  10311024630260 |   743029715 |  331577308990 |
| background    | wait/io/file/sql/FRM                 |    1404 |   1405484392445 |  1001056970 |  584735335675 |
| localhost     | wait/io/file/sql/FRM                 |     526 |   1067680283670 |  2029810380 |  238569415220 |
| 192.168.23.10 | wait/lock/table/sql/handler          |  266974 |    551579769605 |     2065765 |   25834904220 |
| background    | wait/io/file/myisam/kfile            |      33 |    473172383825 | 14338556910 |  331729231625 |
| 192.168.23.10 | wait/io/file/sql/FRM                 |     130 |     84844547115 |   652650285 |   31024603660 |
| localhost     | wait/io/file/myisam/dfile            |      25 |     56702742150 |  2268109625 |   23357858920 |
| localhost     | wait/io/file/sql/file_parser         |     204 |     28396423845 |   139198035 |   23793573990 |
| background    | wait/io/file/mysys/cnf               |       5 |     19273647840 |  3854729385 |   19169800220 |
| background    | wait/io/file/myisam/dfile            |      24 |     13431475015 |   559644500 |   11908891835 |
| background    | wait/io/file/mysys/charset           |       3 |      9642786060 |  3214262020 |    9606707000 |
| background    | wait/io/file/sql/ERRMSG              |       5 |      8360195485 |  1672038975 |    3770732080 |
| localhost     | wait/io/file/myisam/kfile            |       4 |      1356593640 |   339148410 |    1331465300 |
| background    | wait/io/file/sql/binlog_index        |      15 |      1232293025 |    82152665 |    1120797225 |
| background    | wait/io/file/sql/pid                 |       3 |       296007380 |    98669025 |     207822120 |
| localhost     | wait/io/file/sql/dbopt               |      12 |       214129520 |    17844025 |      83346740 |
| background    | wait/io/file/sql/casetest            |      10 |       148326380 |    14832455 |      52451460 |
| 192.168.23.10 | wait/io/file/sql/dbopt               |       4 |        79659900 |    19914975 |      70984480 |
| background    | wait/io/file/sql/global_ddl_log      |       2 |        18142620 |     9071310 |      15014540 |
+---------------+--------------------------------------+---------+-----------------+-------------+---------------+
25 rows in set (0.01 sec)

mysql>
##查看用户相关的延时
mysql> select * from x$waits_by_user_by_latency order by total_latency desc ;
+----------+--------------------------------------+---------+-----------------+-------------+---------------+
| user     | event                                | total   | total_latency   | avg_latency | max_latency   |
+----------+--------------------------------------+---------+-----------------+-------------+---------------+
| sysbench | wait/io/file/sql/binlog              |   27875 | 224727885984870 |  8061986920 | 2402537542350 |
| sysbench | wait/io/table/sql/handler            | 7068872 |  96860278959465 |    13702125 | 3369646613620 |
| sysbench | wait/io/file/innodb/innodb_log_file  |   15628 |  20073781544475 |  1284475170 | 1609081505740 |
| sysbench | wait/io/file/innodb/innodb_data_file |     598 |  11246278276650 | 18806485135 |  380929741155 |
| root     | wait/io/file/sql/FRM                 |     526 |   1067680283670 |  2029810380 |  238569415220 |
| sysbench | wait/lock/table/sql/handler          |  302216 |    613611714840 |     2030080 |   25834904220 |
| sysbench | wait/io/file/sql/FRM                 |     130 |     84844547115 |   652650285 |   31024603660 |
| root     | wait/io/file/myisam/dfile            |      25 |     56702742150 |  2268109625 |   23357858920 |
| root     | wait/io/file/sql/file_parser         |     204 |     28396423845 |   139198035 |   23793573990 |
| root     | wait/io/file/myisam/kfile            |       4 |      1356593640 |   339148410 |    1331465300 |
| root     | wait/io/file/sql/dbopt               |      12 |       214129520 |    17844025 |      83346740 |
| sysbench | wait/io/file/sql/dbopt               |       4 |        79659900 |    19914975 |      70984480 |
+----------+--------------------------------------+---------+-----------------+-------------+---------------+
12 rows in set (0.01 sec)

mysql>
#用户发来的sql情况，比如：总的SQL条目，语句执行延时，平均延时，是否存在表扫描情况，文件IO，IO延时
mysql> select * from x$user_summary;
+------------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+----------------+------------------------+
| user       | statements | statement_latency | statement_avg_latency | table_scans | file_ios | file_io_latency | current_connections | total_connections | unique_hosts | current_memory | total_memory_allocated |
+------------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+----------------+------------------------+
| sysbench   |     367069 |  1332340924078000 |       3629674323.0237 |           0 |    48220 | 297374827396840 |                   8 |                 8 |            1 |              0 |                      0 |
| root       |        115 |     2249030116000 |      19556783617.3913 |          11 |      771 |   1154350172825 |                   1 |                 1 |            1 |              0 |                      0 |
| background |          0 |                 0 |                0.0000 |           0 |   132723 |  89773752093085 |                  25 |                27 |            0 |              0 |                      0 |
+------------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+----------------+------------------------+
3 rows in set (0.48 sec)

mysql>

第二：IO相关情况

##可以通过这几个视图来看一下数具体数据文件IO相关的情况
#查看相关数据文件总的读取字节，平均读取字节，总的写的字节，平均写的自己，以及写比例
 mysql> select * from x$io_global_by_file_by_bytes ORDER BY total desc limit 10;
+-----------------------------------------+------------+------------+------------+-------------+---------------+-------------+------------+-----------+
| file                                    | count_read | total_read | avg_read   | count_write | total_written | avg_write   | total      | write_pct |
+-----------------------------------------+------------+------------+------------+-------------+---------------+-------------+------------+-----------+
| /data/3306/logs/mysql-bin.000006        |     128456 | 1052302029 |  8191.9259 |           0 |             0 |      0.0000 | 1052302029 |      0.00 |
| /data/3306/data/ib_logfile0             |          7 |      70144 | 10020.5714 |       52836 |     177236480 |   3354.4644 |  177306624 |     99.96 |
| /data/3306/logs/mysql-bin.000007        |          0 |          0 |     0.0000 |       52464 |      94883118 |   1808.5376 |   94883118 |    100.00 |
| /data/3306/data/ibdata1                 |        284 |    6766592 | 23826.0282 |         633 |      48414720 |  76484.5498 |   55181312 |     87.74 |
| /data/3306/data/sysbench/sbtest3.ibd    |        734 |   12025856 | 16384.0000 |         140 |       2293760 |  16384.0000 |   14319616 |     16.02 |
| /data/3306/data/ibtmp1                  |          0 |          0 |     0.0000 |          46 |      13139968 | 285651.4783 |   13139968 |    100.00 |
| /data/3306/data/mysql/proc.MYD          |        204 |     605753 |  2969.3775 |           0 |             0 |      0.0000 |     605753 |      0.00 |
| /data/3306/logs/mysql-bin.000001        |         14 |      99474 |  7105.2857 |           0 |             0 |      0.0000 |      99474 |      0.00 |
| /opt/app/mysql/share/english/errmsg.sys |          3 |      75456 | 25152.0000 |           0 |             0 |      0.0000 |      75456 |      0.00 |
| /data/3306/data/mysql/engine_cost.ibd   |          4 |      65536 | 16384.0000 |           0 |             0 |      0.0000 |      65536 |      0.00 |
+-----------------------------------------+------------+------------+------------+-------------+---------------+-------------+------------+-----------+
10 rows in set (0.00 sec)

mysql> 

mysql> select * from x$io_global_by_file_by_latency ORDER BY total_latency desc limit 10;
+---------------------------------------------------+--------+-----------------+------------+----------------+-------------+-----------------+------------+-----------------+
| file                                              | total  | total_latency   | count_read | read_latency   | count_write | write_latency   | count_misc | misc_latency    |
+---------------------------------------------------+--------+-----------------+------------+----------------+-------------+-----------------+------------+-----------------+
| /data/3306/logs/mysql-bin.000007                  | 104272 | 857635813928830 |          0 |              0 |       59585 | 128645758363315 |      44687 | 728990055565515 |
| /data/3306/data/ib_logfile0                       |  61003 | 130330488448400 |          7 |    23089028260 |       59975 |  70847663102440 |       1021 |  59459736317700 |
| /data/3306/logs/mysql-bin.000006                  | 128462 |  43435687994120 |     128456 | 43435586393740 |           0 |               0 |          6 |       101600380 |
| /data/3306/data/ibdata1                           |   1567 |  21265602188520 |        284 |   763552576960 |         633 |   7409130660570 |        650 |  13092918950990 |
| /data/3306/data/sysbench/sbtest3.ibd              |   1048 |  14948103372255 |        740 | 12899909284700 |         140 |     20390455360 |        168 |   2027803632195 |
| /data/3306/data/mysql/db.frm                      |     13 |    584825990215 |          7 |   584777107255 |           0 |               0 |          6 |        48882960 |
| /data/3306/logs/mysql-bin.000001                  |     17 |    573208795500 |         14 |   573147683260 |           0 |               0 |          3 |        61112240 |
| /data/3306/data/mysql/db.MYI                      |      4 |    331753618205 |          2 |   331732946525 |           0 |               0 |          2 |        20671680 |
| /data/3306/data/sys/[email protected]_global_total.frm |      6 |    239301100460 |          2 |   238573608360 |           0 |               0 |          4 |       727492100 |
| /data/3306/data/mysql/server_cost.frm             |     13 |    181650638825 |          7 |   181592420425 |           0 |               0 |          6 |        58218400 |
+---------------------------------------------------+--------+-----------------+------------+----------------+-------------+-----------------+------------+-----------------+
10 rows in set (0.00 sec)

mysql> 

##可以通过下面这几个视图，看一下binlog redolog innodb数据文件等相关数据文件的IO情况：比如总的延时，最小延时，最大延时
mysql> select * from x$io_global_by_wait_by_bytes ORDER BY total_latency desc;
+-------------------------+--------+-----------------+-------------+-------------+----------------+------------+------------+------------+-------------+---------------+-------------+-----------------+
| event_name              | total  | total_latency   | min_latency | avg_latency | max_latency    | count_read | total_read | avg_read   | count_write | total_written | avg_written | total_requested |
+-------------------------+--------+-----------------+-------------+-------------+----------------+------------+------------+------------+-------------+---------------+-------------+-----------------+
| sql/binlog              | 244630 | 952619534005725 |      198860 |  3894123795 | 14005923994180 |     128470 | 1052401503 |  8191.8074 |       66365 |     119844266 |   1805.8354 |      1172245769 |
| innodb/innodb_log_file  |  67875 | 133766003954530 |      871080 |  1970769700 |  6905414126165 |          7 |      70144 | 10020.5714 |       66784 |     223841280 |   3351.7202 |       223911424 |
| innodb/innodb_data_file |   2843 |  36773287483315 |           0 | 12934676985 |   926390076160 |       1097 |   20086784 | 18310.6509 |         819 |      63848448 |  77959.0330 |        83935232 |
| sql/FRM                 |   2251 |   2561727311090 |           0 |  1138039485 |   584735335675 |       1070 |     645174 |   602.9664 |           0 |             0 |      0.0000 |          645174 |
| myisam/kfile            |     37 |    474528977465 |      984540 | 12825107260 |   331729231625 |         18 |       4926 |   273.6667 |           0 |             0 |      0.0000 |            4926 |
| myisam/dfile            |    332 |     77683544835 |      183000 |   233986545 |    23357858920 |        208 |     608353 |  2924.7740 |           0 |             0 |      0.0000 |          608353 |
| sql/file_parser         |    104 |     25346760565 |           0 |   243718790 |    23793573990 |          1 |        720 |   720.0000 |           0 |             0 |      0.0000 |             720 |
| mysys/cnf               |      5 |     19273647840 |      561200 |  3854729385 |    19169800220 |          3 |         56 |    18.6667 |           0 |             0 |      0.0000 |              56 |
| mysys/charset           |      3 |      9642786060 |    10367560 |  3214262020 |     9606707000 |          1 |      18710 | 18710.0000 |           0 |             0 |      0.0000 |           18710 |
| sql/ERRMSG              |      5 |      8360195485 |    18419560 |  1672038975 |     3770732080 |          3 |      75456 | 25152.0000 |           0 |             0 |      0.0000 |           75456 |
| sql/binlog_index        |     15 |      1232293025 |           0 |    82152665 |     1120797225 |          2 |        198 |    99.0000 |           0 |             0 |      0.0000 |             198 |
| sql/pid                 |      3 |       296007380 |     7516420 |    98669025 |      207822120 |          0 |          0 |     0.0000 |           1 |             5 |      5.0000 |               5 |
| sql/dbopt               |     16 |       293789420 |      207400 |    18361610 |       83346740 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |               0 |
| sql/casetest            |     10 |       148326380 |           0 |    14832455 |       52451460 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |               0 |
| sql/global_ddl_log      |      2 |        18142620 |           0 |     9071310 |       15014540 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |               0 |
| archive/data            |      1 |         8641260 |           0 |     8641260 |        8641260 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |               0 |
+-------------------------+--------+-----------------+-------------+-------------+----------------+------------+------------+------------+-------------+---------------+-------------+-----------------+
16 rows in set (0.01 sec)

mysql>
##还可以看一下io_wait,比如总的延时，平均延时，最大延时，读延时，写的延时
mysql> select * from x$io_global_by_wait_by_latency ORDER BY total desc;
+-------------------------+--------+------------------+-------------+----------------+----------------+-----------------+-----------------+------------+------------+------------+-------------+---------------+-------------+
| event_name              | total  | total_latency    | avg_latency | max_latency    | read_latency   | write_latency   | misc_latency    | count_read | total_read | avg_read   | count_write | total_written | avg_written |
+-------------------------+--------+------------------+-------------+----------------+----------------+-----------------+-----------------+------------+------------+------------+-------------+---------------+-------------+
| sql/binlog              | 254738 | 1041025347208805 |  4086651080 | 14005923994180 | 44008734077000 | 150831466222860 | 846185146908945 |     128470 | 1052401503 |  8191.8074 |       72233 |     130580710 |   1807.7708 |
| innodb/innodb_log_file  |  73858 |  146987100334955 |  1990130795 |  6905414126165 |    23089028260 |  79908484855465 |  67055526451230 |          7 |      70144 | 10020.5714 |       72674 |     243804160 |   3354.7646 |
| innodb/innodb_data_file |   2866 |   37182251112810 | 12973569670 |   926390076160 | 14299955007730 |   7562926369195 |  15319369735885 |       1104 |   20201472 | 18298.4348 |         827 |      67190784 |  81246.4135 |
| sql/FRM                 |   2251 |    2561727311090 |  1138039485 |   584735335675 |  2539017648540 |               0 |     22709662550 |       1070 |     645174 |   602.9664 |           0 |             0 |      0.0000 |
| myisam/dfile            |    332 |      77683544835 |   233986545 |    23357858920 |    77180177715 |               0 |       503367120 |        208 |     608353 |  2924.7740 |           0 |             0 |      0.0000 |
| sql/file_parser         |    104 |      25346760565 |   243718790 |    23793573990 |    23793573990 |               0 |      1553186575 |          1 |        720 |   720.0000 |           0 |             0 |      0.0000 |
| myisam/kfile            |     37 |     474528977465 | 12825107260 |   331729231625 |   474326969865 |               0 |       202007600 |         18 |       4926 |   273.6667 |           0 |             0 |      0.0000 |
| sql/dbopt               |     16 |        293789420 |    18361610 |       83346740 |              0 |               0 |       293789420 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |
| sql/binlog_index        |     15 |       1232293025 |    82152665 |     1120797225 |        5070320 |               0 |      1227222705 |          2 |        198 |    99.0000 |           0 |             0 |      0.0000 |
| sql/casetest            |     10 |        148326380 |    14832455 |       52451460 |              0 |               0 |       148326380 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |
| sql/ERRMSG              |      5 |       8360195485 |  1672038975 |     3770732080 |     4789648020 |               0 |      3570547465 |          3 |      75456 | 25152.0000 |           0 |             0 |      0.0000 |
| mysys/cnf               |      5 |      19273647840 |  3854729385 |    19169800220 |    19173307720 |               0 |       100340120 |          3 |         56 |    18.6667 |           0 |             0 |      0.0000 |
| sql/pid                 |      3 |        296007380 |    98669025 |      207822120 |              0 |        80668840 |       215338540 |          0 |          0 |     0.0000 |           1 |             5 |      5.0000 |
| mysys/charset           |      3 |       9642786060 |  3214262020 |     9606707000 |     9606707000 |               0 |        36079060 |          1 |      18710 | 18710.0000 |           0 |             0 |      0.0000 |
| sql/global_ddl_log      |      2 |         18142620 |     9071310 |       15014540 |              0 |               0 |        18142620 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |
| archive/data            |      1 |          8641260 |     8641260 |        8641260 |              0 |               0 |         8641260 |          0 |          0 |     0.0000 |           0 |             0 |      0.0000 |
+-------------------------+--------+------------------+-------------+----------------+----------------+-----------------+-----------------+------------+------------+------------+-------------+---------------+-------------+
16 rows in set (0.38 sec)

从这边来看，binlog IO压力比较大。

第三：锁相关情况

##看一下sysbench库对innod_buffer使用的情况，比如有多少个页，有多少页是脏页，有多少行给cache
mysql> select * from innodb_buffer_stats_by_schema;
+---------------+------------+------------+-------+--------------+-----------+-------------+
| object_schema | allocated  | data       | pages | pages_hashed | pages_old | rows_cached |
+---------------+------------+------------+-------+--------------+-----------+-------------+
| sysbench      | 163.80 MiB | 143.80 MiB | 10483 |        10483 |     10483 |      153684 |
| InnoDB System | 9.67 MiB   | 8.80 MiB   |   619 |          619 |       619 |        9908 |
| mysql         | 240.00 KiB | 7.75 KiB   |    15 |           15 |        15 |          97 |
+---------------+------------+------------+-------+--------------+-----------+-------------+
3 rows in set (2.20 sec)
##我们可以看表相关的数据
mysql> select * from innodb_buffer_stats_by_table;
+---------------+---------------------------+-----------+-----------+-------+--------------+-----------+-------------+
| object_schema | object_name               | allocated | data      | pages | pages_hashed | pages_old | rows_cached |
+---------------+---------------------------+-----------+-----------+-------+--------------+-----------+-------------+
| sysbench      | sbtest10                  | 23.50 MiB | 20.91 MiB |  1504 |         1504 |      1504 |      100819 |
| sysbench      | sbtest1                   | 23.47 MiB | 20.90 MiB |  1502 |         1502 |      1502 |      100750 |
| InnoDB System | SYS_TABLES                | 22.14 MiB | 20.37 MiB |  1417 |         1417 |      1417 |       69711 |
| sysbench      | sbtest9                   | 18.27 MiB | 16.10 MiB |  1169 |         1169 |      1169 |       88908 |
| sysbench      | sbtest8                   | 14.31 MiB | 12.43 MiB |   916 |          916 |       916 |       81720 |
| sysbench      | sbtest6                   | 14.22 MiB | 12.40 MiB |   910 |          910 |       910 |       79381 |
| sysbench      | sbtest3                   | 14.17 MiB | 12.36 MiB |   907 |          907 |       907 |       79017 |
| sysbench      | sbtest7                   | 14.16 MiB | 12.34 MiB |   906 |          906 |       906 |       79234 |
| sysbench      | sbtest5                   | 14.09 MiB | 12.29 MiB |   902 |          902 |       902 |       78814 |
| sysbench      | sbtest4                   | 14.06 MiB | 12.28 MiB |   900 |          900 |       900 |       78797 |
| sysbench      | sbtest2                   | 14.00 MiB | 12.20 MiB |   896 |          896 |       896 |       78876 |
| InnoDB System | SYS_FOREIGN               | 32.00 KiB | 0 bytes   |     2 |            2 |         2 |           0 |
| InnoDB System | SYS_COLUMNS               | 16.00 KiB | 10.91 KiB |     1 |            1 |         1 |         173 |
| InnoDB System | SYS_DATAFILES             | 16.00 KiB | 1.52 KiB  |     1 |            1 |         1 |          30 |
| InnoDB System | SYS_FIELDS                | 16.00 KiB | 2.68 KiB  |     1 |            1 |         1 |          64 |
| InnoDB System | SYS_INDEXES               | 16.00 KiB | 3.49 KiB  |     1 |            1 |         1 |          50 |
| InnoDB System | SYS_TABLESPACES           | 16.00 KiB | 1.49 KiB  |     1 |            1 |         1 |          30 |
| mysql         | engine_cost               | 16.00 KiB | 112 bytes |     1 |            1 |         1 |           2 |
| mysql         | gtid_executed             | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | innodb_index_stats        | 16.00 KiB | 6.63 KiB  |     1 |            1 |         1 |          77 |
| mysql         | innodb_table_stats        | 16.00 KiB | 758 bytes |     1 |            1 |         1 |          12 |
| mysql         | plugin                    | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | servers                   | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | server_cost               | 16.00 KiB | 279 bytes |     1 |            1 |         1 |           6 |
| mysql         | slave_master_info         | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | slave_relay_log_info      | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | slave_worker_info         | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | time_zone                 | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | time_zone_leap_second     | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | time_zone_name            | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | time_zone_transition      | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
| mysql         | time_zone_transition_type | 16.00 KiB | 0 bytes   |     1 |            1 |         1 |           0 |
+---------------+---------------------------+-----------+-----------+-------+--------------+-----------+-------------+
32 rows in set (1.06 sec)

mysql> 

##查询锁相关的信息
mysql> select * from innodb_lock_waits;
Empty set (0.00 sec)

mysql>
mysql> select * from innodb_lock_waits;
Empty set (0.00 sec)
居然结果接为空，那么祭出以前查锁的SQL，也是没有锁等待相关的信息
mysql> SELECT
    ->  r.trx_id waiting_trx_id,
    ->  r.trx_mysql_thread_id waiting_thread,
    ->  LEFT (r.trx_query, 20) waiting_query,
    ->  concat(
    ->   concat(lw.lock_type, ‘ ‘),
    ->   lw.lock_mode
    ->  ) waiting_for_lock,
    ->  b.trx_id blocking_trx_id,
    ->  b.trx_mysql_thread_id blocking_thread,
    ->  LEFT (b.trx_query, 20) blocking_query,
    ->  concat(
    ->   concat(lb.lock_type, ‘ ‘),
    ->   lb.lock_mode
    ->  ) blocking_lock
    -> FROM
    ->  information_schema.innodb_lock_waits w
    -> INNER JOIN information_schema.innodb_trx b ON b.trx_id = w.blocking_trx_id
    -> INNER JOIN information_schema.innodb_trx r ON r.trx_id = w.requesting_trx_id
    -> INNER JOIN information_schema.innodb_locks lw ON lw.lock_trx_id = r.trx_id
    -> INNER JOIN information_schema.innodb_locks lb ON lb.lock_trx_id = b.trx_id;
Empty set (0.03 sec)

mysql> SELECT * from information_schema.innodb_lock_waits w
Empty set (0.01 sec)

第四：索引相关的情况

##我们还可以来看一下索引相关的信息
mysql> select * from schema_index_statistics;
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency |
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| sysbench     | sbtest6    | PRIMARY    |       5560278 | 29.86 s        |             0 | 0 ps           |        26668 | 2.36 s         |        13333 | 0 ps           |
| sysbench     | sbtest8    | PRIMARY    |       5548180 | 29.83 s        |             0 | 0 ps           |        26606 | 2.24 s         |        13302 | 0 ps           |
| sysbench     | sbtest7    | PRIMARY    |       5549019 | 28.25 s        |             0 | 0 ps           |        26614 | 2.22 s         |        13307 | 0 ps           |
| sysbench     | sbtest3    | PRIMARY    |       5549019 | 25.26 s        |             0 | 0 ps           |        26614 | 3.49 s         |        13306 | 0 ps           |
| sysbench     | sbtest5    | PRIMARY    |       5547357 | 25.72 s        |             0 | 0 ps           |        26606 | 2.64 s         |        13302 | 0 ps           |
| sysbench     | sbtest4    | PRIMARY    |       5604063 | 25.28 s        |             0 | 0 ps           |        26878 | 2.44 s         |        13439 | 0 ps           |
| sysbench     | sbtest2    | PRIMARY    |       5561944 | 25.14 s        |             0 | 0 ps           |        26674 | 2.27 s         |        13336 | 0 ps           |
| sysbench     | sbtest1    | PRIMARY    |       5608648 | 24.71 s        |             0 | 0 ps           |        26898 | 2.67 s         |        13448 | 0 ps           |
| sysbench     | sbtest9    | PRIMARY    |       5445603 | 23.38 s        |             0 | 0 ps           |        26118 | 2.29 s         |        13058 | 0 ps           |
| sysbench     | sbtest10   | PRIMARY    |       5544849 | 18.25 s        |             0 | 0 ps           |        26594 | 2.92 s         |        13296 | 0 ps           |
| sysbench     | sbtest10   | k_10       |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest9    | k_9        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest2    | k_2        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest7    | k_7        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest4    | k_4        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest6    | k_6        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest8    | k_8        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest1    | k_1        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest3    | k_3        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest5    | k_5        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sys          | sys_config | PRIMARY    |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
21 rows in set (0.01 sec)

mysql> 

从上面看，二级索引没有用到，那么请放心，还有一个视图，可以看那些没有使用到的索引。
mysql> select * from schema_unused_indexes;
+---------------+-------------+------------+
| object_schema | object_name | index_name |
+---------------+-------------+------------+
| sysbench      | sbtest1     | k_1        |
| sysbench      | sbtest10    | k_10       |
| sysbench      | sbtest2     | k_2        |
| sysbench      | sbtest3     | k_3        |
| sysbench      | sbtest4     | k_4        |
| sysbench      | sbtest5     | k_5        |
| sysbench      | sbtest6     | k_6        |
| sysbench      | sbtest7     | k_7        |
| sysbench      | sbtest8     | k_8        |
| sysbench      | sbtest9     | k_9        |
+---------------+-------------+------------+
10 rows in set (0.00 sec)
果然是，看到么，这些都是没有使用的索引。
那么我们来做居于二级索引的查询

mysql> explain select * from sysbench.sbtest1 where k>20000 and k < 300000 limit 10;
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
| id | select_type | table   | partitions | type  | possible_keys | key  | key_len | ref  | rows  | filtered | Extra                            |
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
|  1 | SIMPLE      | sbtest1 | NULL       | range | k_1           | k_1  | 4       | NULL | 49356 |   100.00 | Using index condition; Using MRR |
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> explain select * from sysbench.sbtest2 where k>20000 and k < 300000 limit 10;
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
| id | select_type | table   | partitions | type  | possible_keys | key  | key_len | ref  | rows  | filtered | Extra                            |
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
|  1 | SIMPLE      | sbtest2 | NULL       | range | k_2           | k_2  | 4       | NULL | 49356 |   100.00 | Using index condition; Using MRR |
+----+-------------+---------+------------+-------+---------------+------+---------+------+-------+----------+----------------------------------+
1 row in set, 1 warning (0.00 sec)

mysql> select * from sysbench.sbtest1 where k>20000 and k < 300000 limit 10;
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
| id | k     | c                                                                                                                       | pad                                                         |
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
|  4 | 49641 | 72200234338-75748118569-08939863650-01688814841-36798767826-71560494483-89421079440-11810718401-29133837777-68338627243 | 80945118876-33522718290-51523426562-15979384524-91541356971 |
|  5 | 49853 | 23749555118-82927985580-59934820346-38519110422-33958726372-68179434013-57381755780-85457880176-06440411187-75543443997 | 63721288074-65922289726-32275902397-42202048996-09343452123 |
|  7 | 46713 | 99754685588-47576951480-32708622771-83861221370-03797298475-60503371617-50159644690-11488793570-28225419667-59109289014 | 19994000982-50192009482-63005057222-82729312489-25570376232 |
| 10 | 49830 | 48090103407-09222928184-34050945574-85418069333-36966673537-23363106719-15284068881-04674238815-26203696337-24037044694 | 01495266405-82925129145-92643983850-90243995398-18709399387 |
| 12 | 50016 | 74234360637-48574588774-94392661281-55267159983-87261567077-93953988073-73238443191-61462412385-80374300764-69242108888 | 11399505661-39569525290-74083577319-45975208227-87547792377 |
| 13 | 49695 | 11498955389-75631629488-85767989076-95838361327-75745845491-06636682242-04442720409-63620680000-65777923254-84246739789 | 79529108858-38821864666-03539816919-68090429532-12191652597 |
| 14 | 48679 | 80577254755-25715914552-67491941642-61787189596-01764534367-26123282523-31822523583-87325913348-83945913133-33321942990 | 27564894805-66292739248-81291800483-50568693575-98305077942 |
| 15 | 43188 | 24572116324-52508797249-93080471635-19894665035-71650646618-84217684256-01633514832-46136473796-67731960381-56369759130 | 90405189049-64391027347-85099607773-42775551106-33828944071 |
| 22 | 49790 | 14727371780-27787201378-78787463594-18460466846-21839479873-30447182067-93416020974-84136743014-58317107496-48981937169 | 96709539373-81997780696-95347904390-38078115633-62447355461 |
| 24 | 50116 | 96225808974-56822595984-95377074482-83456476383-25408814447-92968603608-77649769299-95136600978-30286715144-34964058160 | 10255815850-80260680522-69787802778-01654410036-27346900110 |
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
10 rows in set (0.08 sec)

mysql> select * from schema_unused_indexes;
+---------------+-------------+------------+
| object_schema | object_name | index_name |
+---------------+-------------+------------+
| sysbench      | sbtest10    | k_10       |
| sysbench      | sbtest2     | k_2        |
| sysbench      | sbtest3     | k_3        |
| sysbench      | sbtest4     | k_4        |
| sysbench      | sbtest5     | k_5        |
| sysbench      | sbtest6     | k_6        |
| sysbench      | sbtest7     | k_7        |
| sysbench      | sbtest8     | k_8        |
| sysbench      | sbtest9     | k_9        |
+---------------+-------------+------------+
9 rows in set (0.00 sec)

果然少了k_1这条记录，那么我们再来跑一条SQL
mysql> select * from sysbench.sbtest2 where k>20000 and k < 300000 limit 10;
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
| id | k     | c                                                                                                                       | pad                                                         |
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
|  1 | 37372 | 54639105819-16259544371-38966759492-66999912337-13548132801-80544405444-79539314720-32068629147-90900768592-16318316772 | 96606684936-58047612149-96589063577-62157334542-37838281884 |
|  4 | 49737 | 76432031163-71082225915-51747901141-58191524359-34226352669-76437191960-78998016630-94870264983-68822732782-16804829418 | 10598850124-46789233892-77449575307-15448579987-39538995991 |
|  6 | 49609 | 68712691205-63107998159-64981423874-65117316605-12657286765-28478620831-00662908329-73373344241-31539201905-90207838601 | 46390249800-49241858889-88717353984-62437480033-27070657303 |
|  7 | 43795 | 81945134047-13752863295-40177143001-51811603023-34115604442-58569202235-47907855956-52553436490-01199352836-10458918072 | 56484510344-55979250739-19585989738-90383563823-46493265207 |
|  8 | 49684 | 34420533663-54038493821-46431897178-28576698061-64364226207-22045824272-09779719965-84080490519-86234598495-32047836208 | 73398780442-55087053058-09573601436-31976861664-93834409918 |
|  9 | 49761 | 64421558336-96143555634-02934260184-52016406629-09713489670-00822229975-16093903942-64191433366-89911357749-86864843538 | 51328473205-38224917895-89735391293-17288582256-71538928494 |
| 12 | 49598 | 09178092099-56872779304-51697919448-64097307346-95828899595-94230554314-43705628683-88895344345-11666676745-47969541122 | 61662005851-15114690306-98155697417-87100105017-96830315039 |
| 15 | 49541 | 76900072319-35987654919-50048067261-24472113440-63910535111-26411257853-96055015877-26509202104-91799728109-82265279740 | 62293558682-82611871963-79993907787-79488415807-93911108058 |
| 16 | 48829 | 04133140238-43572791555-75347202122-54422972690-64589127713-57063739125-44111218359-48928414356-02442608690-57065565592 | 79015166415-61414116745-70055176805-81602222449-06391339877 |
| 18 | 50111 | 44187878005-24006418751-02070385596-63080429577-80152358864-08567618381-25204276585-54310685145-87741962441-37764491270 | 33463501619-79009660777-32042388639-26703142056-76420027918 |
+----+-------+-------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------+
10 rows in set (3.56 sec)
mysql> select * from schema_unused_indexes;
+---------------+-------------+------------+
| object_schema | object_name | index_name |
+---------------+-------------+------------+
| sysbench      | sbtest10    | k_10       |
| sysbench      | sbtest3     | k_3        |
| sysbench      | sbtest4     | k_4        |
| sysbench      | sbtest5     | k_5        |
| sysbench      | sbtest6     | k_6        |
| sysbench      | sbtest7     | k_7        |
| sysbench      | sbtest8     | k_8        |
| sysbench      | sbtest9     | k_9        |
+---------------+-------------+------------+
8 rows in set (0.00 sec)

果然又少了k_2，这个时候我们再来回看一下schema_index_statistics视图，k_1,k_2 就有数据了，居于索引总共扫描了多少行，查询总延时，从这个也可以看到sysbench脚本压测都是居于主键，建议有能力的小伙伴可以修改一下lua压测脚本
mysql> select * from schema_index_statistics;
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency |
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
| sysbench     | sbtest8    | PRIMARY    |      10189391 | 41.50 s        |             0 | 0 ps           |        48866 | 3.70 s         |        24432 | 0 ps           |
| sysbench     | sbtest6    | PRIMARY    |      10180534 | 41.05 s        |             0 | 0 ps           |        48826 | 3.87 s         |        24412 | 0 ps           |
| sysbench     | sbtest7    | PRIMARY    |      10224006 | 39.66 s        |             0 | 0 ps           |        49036 | 3.73 s         |        24518 | 0 ps           |
| sysbench     | sbtest5    | PRIMARY    |      10167297 | 37.13 s        |             0 | 0 ps           |        48763 | 4.12 s         |        24380 | 0 ps           |
| sysbench     | sbtest3    | PRIMARY    |      10161878 | 36.30 s        |             0 | 0 ps           |        48738 | 4.96 s         |        24368 | 0 ps           |
| sysbench     | sbtest4    | PRIMARY    |      10193564 | 36.42 s        |             0 | 0 ps           |        48890 | 3.89 s         |        24444 | 0 ps           |
| sysbench     | sbtest2    | PRIMARY    |      10139356 | 36.15 s        |             0 | 0 ps           |        48626 | 3.74 s         |        24311 | 0 ps           |
| sysbench     | sbtest1    | PRIMARY    |      10281967 | 35.75 s        |             0 | 0 ps           |        49312 | 4.17 s         |        24655 | 0 ps           |
| sysbench     | sbtest9    | PRIMARY    |      10135185 | 34.59 s        |             0 | 0 ps           |        48610 | 3.81 s         |        24304 | 0 ps           |
| sysbench     | sbtest10   | PRIMARY    |      10189088 | 29.17 s        |             0 | 0 ps           |        48868 | 4.40 s         |        24432 | 0 ps           |
| sysbench     | sbtest2    | k_2        |         59227 | 3.53 s         |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest1    | k_1        |         59228 | 39.70 ms       |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest10   | k_10       |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest9    | k_9        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest7    | k_7        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest4    | k_4        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest6    | k_6        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest8    | k_8        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest3    | k_3        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sysbench     | sbtest5    | k_5        |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
| sys          | sys_config | PRIMARY    |             0 | 0 ps           |             0 | 0 ps           |            0 | 0 ps           |            0 | 0 ps           |
+--------------+------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
21 rows in set (0.01 sec)

mysql>

第五：SQL相关的情况

##查询有生成临时表的SQL相关情况
mysql> select * from x$statement_analysis where db =‘sysbench‘ and tmp_tables > 0 and query not like ‘show%‘ ORDER BY tmp_disk_tables DESC LIMIT 3 \G
*************************** 1. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest10` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
full_scan:
exec_count: 243308
err_count: 0
warn_count: 0
total_latency: 421664798643000
max_latency: 13932957371000
avg_latency: 1733049000
lock_latency: 20795990000000
rows_sent: 24330900
rows_sent_avg: 100
rows_examined: 72992700
rows_examined_avg: 300
rows_affected: 0
rows_affected_avg: 0
tmp_tables: 243311
tmp_disk_tables: 0
rows_sorted: 24330500
sort_merge_passes: 0
digest: 7bec897913ccc856e2ea999413cc9ad1
first_seen: 2016-06-19 11:25:23
last_seen: 2016-06-19 13:57:05
*************************** 2. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest9` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
full_scan:
exec_count: 242949
err_count: 0
warn_count: 0
total_latency: 392145676272000
max_latency: 5201577387000
avg_latency: 1614106000
lock_latency: 20798157000000
rows_sent: 24295400
rows_sent_avg: 100
rows_examined: 72886500
rows_examined_avg: 300
rows_affected: 0
rows_affected_avg: 0
tmp_tables: 242954
tmp_disk_tables: 0
rows_sorted: 24295300
sort_merge_passes: 0
digest: 5326958ce3e23f6fea751ada9dfa05a4
first_seen: 2016-06-19 11:25:23
last_seen: 2016-06-19 13:57:05
*************************** 3. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest7` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
full_scan:
exec_count: 242815
err_count: 0
warn_count: 0
total_latency: 388029765111000
max_latency: 2019677047000
avg_latency: 1598046000
lock_latency: 20501920000000
rows_sent: 24282000
rows_sent_avg: 100
rows_examined: 72846600
rows_examined_avg: 300
rows_affected: 0
rows_affected_avg: 0
tmp_tables: 242821
tmp_disk_tables: 0
rows_sorted: 24281600
sort_merge_passes: 0
digest: 9483723c685eb28e9cfc506b30578698
first_seen: 2016-06-19 11:25:24
last_seen: 2016-06-19 13:57:05
3 rows in set (0.00 sec)

mysql>
##还可以用这个视图，查看生成临时表的SQL执行情况，如执行了多少次，生成多少临时表，有多少在硬盘上生成的临时表
mysql> select * from x$statements_with_temp_tables where db=‘sysbench‘ and query not like ‘show%‘ limit 3\G;
*************************** 1. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest4` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
exec_count: 249558
total_latency: 405559669482000
memory_tmp_tables: 249563
disk_tmp_tables: 0
avg_tmp_tables_per_query: 1
tmp_tables_to_disk_pct: 0
first_seen: 2016-06-19 11:25:24
last_seen: 2016-06-19 14:00:36
digest: 884e86516aebcd28e0da39d6a7df164a
*************************** 2. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest5` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
exec_count: 249542
total_latency: 391186176853000
memory_tmp_tables: 249550
disk_tmp_tables: 0
avg_tmp_tables_per_query: 1
tmp_tables_to_disk_pct: 0
first_seen: 2016-06-19 11:25:24
last_seen: 2016-06-19 14:00:36
digest: bff86a3aa37ae0242218d5657499e5a2
*************************** 3. row ***************************
query: SELECT DISTINCTROW `c` FROM `sbtest10` WHERE `id` BETWEEN ? AND ? + ? ORDER BY `c`
db: sysbench
exec_count: 249459
total_latency: 428970366771000
memory_tmp_tables: 249462
disk_tmp_tables: 0
avg_tmp_tables_per_query: 1
tmp_tables_to_disk_pct: 0
first_seen: 2016-06-19 11:25:23
last_seen: 2016-06-19 14:00:36
digest: 7bec897913ccc856e2ea999413cc9ad1
3 rows in set (0.01 sec)

##查看有全表扫描的SQL
mysql> SELECT * FROM statement_analysis WHERE db=‘sysbench‘ AND full_scan = ‘*‘ AND query not like ‘show%‘ AND exec_count > 1\G
*************************** 1. row ***************************
query: SELECT * FROM `sbtest5`
db: sysbench
full_scan: *
exec_count: 2
err_count: 0
warn_count: 0
total_latency: 600.90 ms
max_latency: 456.60 ms
avg_latency: 300.45 ms
lock_latency: 473.00 us
rows_sent: 200000
rows_sent_avg: 100000
rows_examined: 200000
rows_examined_avg: 100000
rows_affected: 0
rows_affected_avg: 0
tmp_tables: 0
tmp_disk_tables: 0
rows_sorted: 0
sort_merge_passes: 0
digest: 146002080199f7b82624570fc9f622b1
first_seen: 2016-06-19 14:20:17
last_seen: 2016-06-19 14:21:01
*************************** 2. row ***************************
query: SELECT `QUERY_ID` , SUM ( `DUR ... ROFILING` GROUP BY `QUERY_ID`
db: sysbench
full_scan: *
exec_count: 5
err_count: 0
warn_count: 5
total_latency: 53.22 ms
max_latency: 48.88 ms
avg_latency: 10.64 ms
lock_latency: 1.19 ms
rows_sent: 62
rows_sent_avg: 12
rows_examined: 1280
rows_examined_avg: 256
rows_affected: 0
rows_affected_avg: 0
tmp_tables: 10
tmp_disk_tables: 0
rows_sorted: 62
sort_merge_passes: 0
digest: c7d88fa65a7f375625dd708d7f208b15
first_seen: 2016-06-19 11:34:44
last_seen: 2016-06-19 14:20:17

时间： 2024-10-27 11:25:17

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