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I have an issue with two RHEL 5.3 x86_64 servers running Oracle RAC 10.2.0.
Both the servers are HP ProLiant DL380 G7 with 36GB of RAM.
At random times (a few times a day) our monitoring solution reports page outs on both the servers as high as 6000. This always happens at the same time on both servers. The alert then disappears after about 5 minutes and reports page outs are almost non existent again.
top shows that the servers aren't swapping heavily at all and there is generally around 5-6GB of free RAM on both servers.
I was wondering if there was any way of pin pointing what process is actually causing the page outs so I can address the issue.
I have tried looking at sar and vmstat but from what I can see they don't provide this functionality. However, I may have missed/not understood something.
If anyone has any suggestions on how to investigate this issue further I would greatly appreciate it.
If any other information is required to provide some advice please let me know and I will post the information.