Why is kswapd using so much CPU? If you reboot the machine and run the
same user process kswapd CPU usage is almost 0% and none of the swap is
used. This machine was upgraded from 2.2 and we did not have the luxury of
re-partitioning it support the "new" 2.4 swap size requirements.
After running for a few days with relatively constant memory usage:
vmstat:
procs memory swap io system
cpu
r b w swpd free buff cache si so bi bo in cs us
sy id
2 0 1 136512 5408 504 209744 0 0 0 2 19 49 10
26 64
top:
5:38pm up 3 days, 19:44, 2 users, load average: 2.08, 2.13, 2.15
34 processes: 32 sleeping, 2 running, 0 zombie, 0 stopped
CPU0 states: 16.0% user, 56.4% system, 16.2% nice, 26.3% idle
CPU1 states: 11.1% user, 57.0% system, 11.0% nice, 31.3% idle
Mem: 1028804K av, 1023744K used, 5060K free, 0K shrd, 504K
buff
Swap: 136512K av, 136512K used, 0K free 209876K
cached
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
28442 root 18 10 898M 812M 36188 R N 56.0 80.9 296:12
gateway.smart.5
28438 root 16 10 898M 811M 35084 S N 43.7 80.7 291:03
gateway.smart.5
5 root 9 0 0 0 0 SW 37.6 0.0 164:58 kswapd
2509 root 18 0 492 492 300 R 2.5 0.0 0:00 top
1 root 9 0 68 0 0 SW 0.0 0.0 0:08 init
2 root 9 0 0 0 0 SW 0.0 0.0 0:00 keventd
3 root 19 19 0 0 0 SWN 0.0 0.0 1:11
ksoftirqd_CPU0
4 root 19 19 0 0 0 SWN 0.0 0.0 1:04
ksoftirqd_CPU1
6 root 9 0 0 0 0 SW 0.0 0.0 0:00 kreclaimd
7 root 9 0 0 0 0 SW 0.0 0.0 0:00 bdflush
8 root 9 0 0 0 0 SW 0.0 0.0 0:07 kupdated
11 root 9 0 0 0 0 SW 0.0 0.0 0:00 scsi_eh_0
315 root 9 0 100 0 0 SW 0.0 0.0 0:00 syslogd
Hope this helps
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