cacti监控图案出现断断续续是不是跟监控的服务数量有关

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cacti监控图案出现断断续续而且没有规律，还有的就直接没有数据了但手动snmpwalk 多能抓到数据。这台机器我还装了nagios 他们多是用snmp服务的 会不会相互有影响啊？

日记报错
06/18/2011 10:04:57 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:04:57 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:05:00 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal
06/18/2011 10:05:01 AM - POLLER: Poller[0] WARNING: Poller Output Table not Empty.  Issues Found: 398, Data Sources: mem_buffers(DS[
3]), mem_swap(DS[4]), (DS[5]), users(DS[6]), proc(DS[7]), mem_buffers(DS[15]), mem_swap(DS[16]), proc(DS[17]), cpu(DS[18]), traffic_
in(DS[19]), traffic_out(DS[19]), traffic_in(DS[20]), traffic_out(DS[20]), hdd_free(DS[21]), hdd_used(DS[21]), hdd_free(DS[22]), hdd_
used(DS[22]), mem_buffers(DS[23]), mem_swap(DS[24]), proc(DS[25]), cpu(DS[26]), Additional Issues Remain.  Only showing first 20
06/18/2011 10:09:56 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:09:56 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:10:00 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
06/18/2011 10:10:00 AM - SYSTEM STATS: Time:298.8892 Method:spine Processes:1 Threads:1 Hosts:63 HostsPerProcess:63 DataSources:602
RRDsProcessed:256
06/18/2011 10:10:01 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal
06/18/2011 10:14:57 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:14:57 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:15:00 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
06/18/2011 10:15:00 AM - SYSTEM STATS: Time:298.7976 Method:spine Processes:1 Threads:1 Hosts:63 HostsPerProcess:63 DataSources:602
RRDsProcessed:261
06/18/2011 10:15:01 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal
06/18/2011 10:19:57 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:19:57 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:20:00 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
06/18/2011 10:20:00 AM - SYSTEM STATS: Time:299.6119 Method:spine Processes:1 Threads:1 Hosts:63 HostsPerProcess:63 DataSources:602
RRDsProcessed:238
06/18/2011 10:20:01 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal
06/18/2011 10:24:57 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:24:57 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:25:00 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
06/18/2011 10:25:00 AM - SYSTEM STATS: Time:298.7331 Method:spine Processes:1 Threads:1 Hosts:63 HostsPerProcess:63 DataSources:602
RRDsProcessed:268
06/18/2011 10:25:01 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal
06/18/2011 10:29:54 AM - PHPSVR: Poller[0] Maximum runtime of 292 seconds exceeded for the Script Server. Exiting.
06/18/2011 10:29:54 AM - SPINE: Poller[0] ERROR: SS[0] PHP Script Server communications lost.  Restarting PHP Script Server
06/18/2011 10:30:00 AM - POLLER: Poller[0] Maximum runtime of 298 seconds exceeded. Exiting.
06/18/2011 10:30:00 AM - SYSTEM STATS: Time:298.8717 Method:spine Processes:1 Threads:1 Hosts:63 HostsPerProcess:63 DataSources:602
RRDsProcessed:244
06/18/2011 10:30:01 AM - SPINE: Poller[0] ERROR: Spine Timed Out While Processing Hosts Internal

RHCE520

你好！请问你上面的问题是怎么解决的！我这边的监控也出现一样的错误？如何解决？请大师指点一下？