swapper process

[bobflorida]

Hi All,

The swapper process on our production AIX box is currently running at 175% to 200% according to the "ps aux" command, on our other systems its barely registers, in the past, on the production box, it never showed up before.
Perhaps this is okay, I just want to be sure, we are seeing some performance problems lately. thanks!

 

[zaxxon]

Are you sure you are on an AIX box? Sorry but I never heared of a swap process. One of the usual ways to check if paging occurs is to run a "vmstat 1" for example.
Maybe you can list your "ps aux" output here so people can see what you mean.
If possible add a "vmstat 1 20" when you think your "swapper" is highly active again.

laters
zaxxon

 

[bobflorida]

here it is, from what I read its job is to move block of memory to/from the disk cache.


USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 0 176.2 0.0 52 52 - A Sep 10 786998:43 swapper
root 286 9.7 0.0 40 40 - A Sep 10 43313:13 wait
root 12580 9.4 0.0 40 40 - A Sep 10 41908:00 wait
root 45078 8.2 0.0 40 40 - A Sep 10 36808:20 wait
root 57372 8.1 0.0 40 40 - A Sep 10 36327:36 wait
root 8196 7.9 0.0 40 40 - A Sep 10 35458:10 wait
root 53274 7.8 0.0 40 40 - A Sep 10 34644:35 wait
root 49176 7.6 0.0 40 40 - A Sep 10 33801:42 wait
db2aixp 3731798 1.3 0.0 9780 8176 - A 10:50:08 0:13 db2agent (PROD
db2aixp 7888934 0.9 0.0 785692 2032 - A 10:52:10 0:01 db2agent (PROD
db2aixp 1122594 0.8 0.0 786848 3196 - A 10:52:09 0:01 db2agent (idle
db2aixp 1769816 0.8 0.0 697064 8020 - A 09:11:42 5:49 db2agent (PROD
root 282950 0.8 0.0 1268 1148 - A Sep 10 3655:31 /usr/bin/xmwlm



here is the vmstat:
System Configuration: lcpu=7 mem=35840MB

kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------
r b avm fre re pi po fr sr cy in sy cs us sy id wa
1 0 7583963 204966 0 0 0 0 0 0 966 324215 28180 22 16 62 1
3 0 7583730 205189 0 1 0 0 0 0 2271 392140 31023 31 19 44 6
6 0 7582434 206481 0 0 0 0 0 0 3413 125297 34914 25 15 54 6
7 0 7582684 206224 0 1 0 0 0 0 2008 85862 32312 27 12 58 3
5 1 7580304 208514 0 21 0 0 0 0 3628 102211 35163 45 15 32 8

 

[kHz]

It seems you have a very intensive CPU application running on your DB2 databases.

Read this link:

http://72.14.203.104/search?q=cache...ix5_cpu/+aix+swapper&hl=en&gl=us&ct=clnk&cd=1