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在用redhat linux 5.2版本后，有一个问题就是有很多snmpd log信息记录在/var/log/messages里，在4u4里是不记录的，导致messages产生大量的重复信息，好多有用的信息很快就会被淹 没，这里通过调整snmp debug级别解决这个问题
/var/log/message 如：
Feb 17 16:00:07 db3 last message repeated 2 times
Feb 17 16:05:02 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48750
Feb 17 16:05:02 db3 snmpd[5479]: Received SNMP packet(s) from UDP: [119.42.224.21]:48750
Feb 17 16:05:02 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48750
Feb 17 16:05:02 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48750
Feb 17 16:05:07 db3 snmpd[5479]: Connection from UDP: [119.42.224.28]:53640
Feb 17 16:05:07 db3 snmpd[5479]: Received SNMP packet(s) from UDP: [119.42.224.28]:53640
Feb 17 16:05:07 db3 snmpd[5479]: Connection from UDP: [119.42.224.28]:53640
Feb 17 16:05:07 db3 last message repeated 2 times
Feb 17 16:10:01 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48765
Feb 17 16:10:01 db3 snmpd[5479]: Received SNMP packet(s) from UDP: [119.42.224.21]:48765
Feb 17 16:10:01 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48765
Feb 17 16:10:01 db3 snmpd[5479]: Connection from UDP: [119.42.224.21]:48765
Feb 17 16:10:21 db3 snmpd[5479]: Connection from UDP: [119.42.224.28]:54506
Feb 17 16:10:21 db3 snmpd[5479]: Received SNMP packet(s) from UDP: [119.42.224.28]:54506
Feb 17 16:10:21 db3 snmpd[5479]: Connection from UDP: [119.42.224.28]:54506

解决方法：
编辑/etc/init.d/snmpd
把：
OPTIONS=”-Lsd -Lf /dev/null -p /var/run/snmpd.pid -a”
修改成：
OPTIONS=”-Lsd 2 -Lf /dev/null -p /var/run/snmpd.pid -a”

然后/etc/rc.d/init.d/snmpd restart 重启snmp即可