1、CactiEz 重启后，访问面页显示空白页面
解决办法：service httpd restart apache重启后，并加入到开机启动中。chkconfig httpd on 或者 vim /etc/rc.local 加入 /etc/init.d/httpd start | restart
2、检查mysql状态，正常状态
3、后来重新刷新，无法进入界面。网上查找说是日志文件把空间占满。（当空间占满，服务运行没有空间支撑）当时df -h 磁盘已被打满，查看到cacti.log单文件14G，另外./var/log/mysqld.log 单个文件为3G
[[email protected] /]# cd /var/www/html/log
[[email protected] log]# ls
cacti.log
cacti.log-20170511 cacti.log-20170513 cacti.log-20170515 cacti.log.bak-20170516
cacti.log-20170510 cacti.log-20170512 cacti.log-20170514 cacti.log-20170516
#日志用于排错，所以要备份部分日志文件。
tail -n 1000 cacti.log > cacti.log.bak-20170516
cat /dev/null > mysqld.log
cat /dev/null > cacti.log
完事后查看空间，可以重新进入cacti可以
4、可以正常登陆访问后，但是cacti不画图，无流量。经查cacti.log的日志，是mysqlcacti表存在问题，按下方式进入 mysql进行修复，然后等待一分钟时间，cacti画图恢复。
[[email protected] log]# tail /var/www/html/log/cacti.log.bak-20170516
05/16/2017 04:46:48 PM - SYSTEM STATS: Time:46.2120 Method:spine Processes:1 Threads:1 Hosts:50 HostsPerProcess:50 DataSources:7294 RRDsProcessed:3702
05/16/2017 04:46:48 PM - CMDPHP: Poller[0] ERROR: SQL Assoc Failed!, Error:‘145‘, SQL:"SELECT data_id, rra_id, lastread, cdef FROM thold_data WHERE thold_enabled=‘on‘ AND tcheck=1"
mysql> use "cacti"
Database changed
mysql> select count(*) from poller_output;
ERROR 145 (HY000): Table ‘./cacti/poller_output‘ is marked as crashed and should be repaired
mysql> truncate table poller_output;
Query OK, 0 rows affected (0.02 sec)
mysql> select count(*) from poller_output;
+----------+
| count(*) |
+----------+
| 0 |
+----------+
1 row in set (0.00 sec)
借鉴cacti排错的文章：
http://blog.csdn.net/wangxiaofei2006/article/details/17755121
http://blog.csdn.net/wangxiaofei2006/article/details/17755121