Cacti不绘制监控图
刚上班，黄教主就叫：xxx，Cacti有问题啦！！！怎么的啦？原来是Cacti不绘制监控图了。
The steps for save issue：
1:出问题了，首先看相关服务日志：
#cd /var/www/html/cacti/log
#tail -fn100 cacti.log
09/18/2012 10:10:08 AM - CMDPHP: Poller[0] ERROR: SQL Assoc Failed!, Error:'1017', SQL:"select poller_output.output, poller_output.time, UNIX_TIMESTAMP(poller_output.time) as unix_time, poller_output.local_data_id, poller_item.rrd_path, poller_item.rrd_name, poller_item.rrd_num from (poller_output,poller_item) where (poller_output.local_data_id=poller_item.local_data_id and poller_output.rrd_name=poller_item.rrd_name) LIMIT 10000"
09/18/2012 10:10:08 AM - CMDPHP: Poller[0] ERROR: SQL Assoc Failed!, Error:'1017', SQL:"select poller_output.output, poller_output.time, UNIX_TIMESTAMP(poller_output.time) as unix_time, poller_output.local_data_id, poller_item.rrd_path, poller_item.rrd_name, poller_item.rrd_num from (poller_output,poller_item) where (poller_output.local_data_id=poller_item.local_data_id and poller_output.rrd_name=poller_item.rrd_name) LIMIT 10000"
发现有N行这样的ERROR关于poller_output这张表的，后来查了一下，网上N多人说是此磁盘满了（或其所在分区满了），也没心思查了，先看立刻解决问题的方法吧！！！
2：登录cacti所在的数据库
#mysql -ucacti -pcacti cacti
mysql> select count(*) from poller_output;
ERROR 1017 (HY000): Can't find file: 'poller_output' (errno: 2)
出现大概如上的错误，查询都没法子，先把这张表的数据清空了。
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)
OK，一切恢复正常了，稍等监控图也会出来啦！！！
看下cacti的日志：
09/18/2012 11:00:05 AM - PHPSVR: Poller[0] WARNING: Script Server terminated with signal 'SIGSEGV' in file:'ss_host_disk.php', function:'ss_host_disk', params:'172.31.10.11 23 2:161:500:1:10:51auto:::::: get total 38'
09/18/2012 11:00:09 AM - SYSTEM STATS: Time:7.3854 Method:spine Processes:10 Threads:10 Hosts:25 HostsPerProcess:3 DataSources:548 RRDsProcessed:455
09/18/2012 11:00:09 AM - SYSTEM THOLD STATS: Time:0.1994 Tholds:44 DownHosts:0
09/18/2012 11:05:10 AM - SYSTEM STATS: Time:8.1963 Method:spine Processes:10 Threads:10 Hosts:25 HostsPerProcess:3 DataSources:548 RRDsProcessed:455
一切正常了》
