I have a zone on a M5000 server running solaris 10. The zone has an SAP application running on it and facing some performance issues. As part of the troubleshooting, I've been recommended to look for any paging on the OS. Please advise how to look for the paging.
I've been looking at the SWAP usage and it seems ok (df -h):
You probably already know this, but just in case... Paging and swapping are not the same thing and your OS could be doing one or both.
As for finding out what's going on in more detail, I'd recommend running "sar" for a few minutes to see what's going on. I don't have access to Solaris anymore so I can't be 100% certain which flags to specify to get paging or swapping related info. So try "man sar" to find the options that look interesting on your system.
But here's an example of what I'm talking about from my Ubuntu system showing paging, swapping, and some general memory activity.
Code:
$ sar -B 5 3
Linux 3.2.0-24-generic (nowhere) 05/22/2014 _x86_64_ (8 CPU)
07:42:45 AM pgpgin/s pgpgout/s fault/s majflt/s pgfree/s pgscank/s pgscand/s pgsteal/s %vmeff
07:42:50 AM 0.00 18.40 1128.00 0.00 717.80 0.00 0.00 0.00 0.00
07:42:55 AM 0.00 24.00 1201.40 0.00 4548.00 0.00 0.00 0.00 0.00
07:43:00 AM 0.00 32.00 465.60 0.00 548.20 0.00 0.00 0.00 0.00
Average: 0.00 24.80 931.67 0.00 1938.00 0.00 0.00 0.00 0.00
$ sar -W 5 3
Linux 3.2.0-24-generic (nowhere) 05/22/2014 _x86_64_ (8 CPU)
07:45:23 AM pswpin/s pswpout/s
07:45:28 AM 0.00 0.00
07:45:33 AM 0.00 0.00
07:45:38 AM 0.00 0.00
Average: 0.00 0.00
$ sar -R 5 3
Linux 3.2.0-24-generic (nowhere) 05/22/2014 _x86_64_ (8 CPU)
07:46:07 AM frmpg/s bufpg/s campg/s
07:46:12 AM -87.20 0.00 0.40
07:46:17 AM -51.40 0.00 0.00
07:46:22 AM -23.00 0.00 -0.20
Average: -53.87 0.00 0.07
You can usually also use vmstat to get this sort of info. have a look in the manual page to see which column is which. if you are getting lots of page-in activity (processes will wait) then have a look at your process memory allocation:-
Code:
ps -el|sort -nk 10
This should list processes and sort them with the largest memory allocation at the bottom (assuming that the SZ column is column 10) and you can then investigate the source of those processes.
hi guys i hope you can help me with this situation.
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05-22-2014
