监控硬盘IO，出现有图无数据的情况，原来是有数据的。突然就没有数据了。
而且日志里面显示大量的日志，如下：
04/17/2009 03:24:03 PM - SYSTEM STATS: Time:1.3185 Method:spine Processes:1 Threads:1 Hosts:13 HostsPerProcess:13 DataSources:93 RRDsProcessed:47
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[11] DS[70] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[11] DS[70] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[11] DS[70] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[67] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[67] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[67] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[66] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[66] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[66] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[65] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[65] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[65] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[64] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[64] WARNING: Result from SNMP not valid. Partial Result: ...
04/17/2009 03:24:02 PM - SPINE: Poller[0] Host[2] DS[64] WARNING: Result from SNMP not valid. Partial Result: ...
意思就是取回来的值是不正确的。
之前还是好的，为啥机器一重启就不对了呢？想很多办法都没有解决，重装snmp扩展。重启snmp服务，都不行。
后来才想起来，修改过服务器上的一个xml文件，snmp_informant_disk.xml。一查看，果然是的。把它修改回来，一切正常。
所以在修改任何文件之前，备份一个是最好的习惯。
呵呵 备注一下。