下载地址： wget http://www.day32.com/MySQL/tuning-primer.sh
# chmod +x tuning-primer.sh
# yum -y install bc
# ./tuning-primer.sh
注意粗体字和有颜色的字，并按照给出的建议修改相应的值
-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -
MySQL Version 5.6.32 x86_64
Uptime = 39 days 1 hrs 25 min 53 sec
Avg. qps = 34
Total Questions = 116173522
Threads Connected = 76
Server has been running for over 48hrs.
It should be safe to follow these recommendations
To find out more information on how each of these
runtime variables effects performance visit:
http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html
Visit http://www.mysql.com/products/enterprise/advisors.html
for info about MySQL‘s Enterprise Monitoring and Advisory Service
SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 10.000000 sec.
You have 129 out of 116173543 that take longer than 10.000000 sec. to complete
Your long_query_time seems to be fine
BINARY UPDATE LOG
The binary update log is NOT enabled.
You will not be able to do point in time recovery
See http://dev.mysql.com/doc/refman/5.6/en/point-in-time-recovery.html
WORKER THREADS
Current thread_cache_size = 9
Current threads_cached = 0
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine
MAX CONNECTIONS
Current max_connections = 2000
Current threads_connected = 76
Historic max_used_connections = 280
The number of used connections is 14% of the configured maximum.
Your max_connections variable seems to be fine.
INNODB STATUS
Current InnoDB index space = 212 M
Current InnoDB data space = 773 M
Current InnoDB buffer pool free = 9 %
Current innodb_buffer_pool_size = 128 M
Depending on how much space your innodb indexes take up it may be safe
to increase this value to up to 2 / 3 of total system memory
MEMORY USAGE
Max Memory Ever Allocated : 468 M
Configured Max Per-thread Buffers : 2.19 G
Configured Max Global Buffers : 153 M
Configured Max Memory Limit : 2.34 G
Physical Memory : 15.65 G
Max memory limit seem to be within acceptable norms
KEY BUFFER
Current MyISAM index space = 122 K
Current key_buffer_size = 8 M
Key cache miss rate is 1 : 1717954
Key buffer free ratio = 81 %
Your key_buffer_size seems to be too high.
Perhaps you can use these resources elsewhere
QUERY CACHE
Query cache is enabled
Current query_cache_size = 1 M
Current query_cache_used = 16 K
Current query_cache_limit = 1 M
Current Query cache Memory fill ratio = 1.64 %
Current query_cache_min_res_unit = 4 K
Your query_cache_size seems to be too high.
Perhaps you can use these resources elsewhere
MySQL won‘t cache query results that are larger than query_cache_limit in size
SORT OPERATIONS
Current sort_buffer_size = 256 K
Current read_rnd_buffer_size = 256 K
Sort buffer seems to be fine
JOINS
Current join_buffer_size = 260.00 K
You have had 156110 queries where a join could not use an index properly
You should enable "log-queries-not-using-indexes"
Then look for non indexed joins in the slow query log.
If you are unable to optimize your queries you may want to increase your
join_buffer_size to accommodate larger joins in one pass.
Note! This script will still suggest raising the join_buffer_size when
ANY joins not using indexes are found.
OPEN FILES LIMIT
Current open_files_limit = 5000 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine
TABLE CACHE
Current table_open_cache = 2000 tables
Current table_definition_cache = 1400 tables
You have a total of 1278 tables
You have 2000 open tables.
Current table_cache hit rate is 37%
, while 100% of your table cache is in use
You should probably increase your table_cache
TEMP TABLES
Current max_heap_table_size = 16 M
Current tmp_table_size = 16 M
Of 21783978 temp tables, 3% were created on disk
Created disk tmp tables ratio seems fine
TABLE SCANS
Current read_buffer_size = 128 K
Current table scan ratio = 810 : 1
read_buffer_size seems to be fine
TABLE LOCKING
Current Lock Wait ratio = 1 : 35042
Your table locking seems to be fine