Posted in Uncategorized on Jan 11th, 2010
My Nagios boxes run pnp4nagios+npcd to record plug-in performance data to RRD files. On one system I enabled rrdcached on, a little over 9,000 files are updated every five minutes. I saw a 30% decrease in disk write operations/second, all other things held constant. There wasn’t a noticeable difference in bytes/second, which I guess [...]
Posted in Uncategorized on Jan 9th, 2010
I was excited to see that rrdtool 1.4 was finally released (in October), and with it rrdcached support finally in a main release. After updating rrdtool packages on a couple of my systems I sat out to make things start using the new caching daemon. Cacti was my first to play around with since it [...]
Posted in Uncategorized on Dec 18th, 2009
It turns out my problems with IPv6-only Net-SNMP wasn’t a problem with snmpd, it was a problem with selinux. After starting with -Dread_config -c /etc/snmp/snmpd.conf it became apparent:
snmpd[9026]: registered debug token read_config, 1
snmpd[9028]: /etc/snmp/snmpd.conf: Permission denied
snmpd[9028]: /etc/snmp/snmpd.conf: Permission denied
snmpd[9028]: Warning: no access control information configured. It’s unlikely this
agent can serve any useful purpose [...]
Posted in Uncategorized on Dec 4th, 2009
[root@nicky bin]# /sbin/ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:16:3E:69:8E:99
inet6 addr: fe80::216:3eff:fe69:8e99/64 Scope:Link
inet6 addr: 2a01:348:0:6:5d59:506a:0:1/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 [...]
