Hi.
Today I had a "load average" issue in a postfix mail server (only runs
postfix service). Suddenly, load average started to raise and qmgr
process appeared on top of "top" taking 20-30% of CPU.
top - 18:19:54 up 7 days, 2:03, 2 users, load average: 4.94, 3.96, 4.02
Tasks: 144 total, 6 running, 138 sleeping, 0 stopped, 0 zombie
Cpu(s): 48.3%us, 50.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 1.0%si,
0.0%st
Mem: 1035280k total, 999964k used, 35316k free, 149072k buffers
Swap: 750696k total, 88k used, 750608k free, 599308k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
COMMAND
23665 postfix 20 0 5880 2628 1792 S 20.3 0.3 68:11.18
qmgr
23662 root 20 0 5392 1732 1400 R 6.0 0.2 20:49.46 master
Network traffic was low and we had the normal throughput of emails.
Queue had only 73 emails in it when the problem happened (just like
now, they are all deferred emails).
Doing "postfix stop" / "postfix start" solved the problem.
I case it happens again ... Where or what should I take a look? At OS
level (disk or network I/O, processes...) I didn't see anything before
the "postfix restart"...
Thanks.
--
Santiago Romero
