AIX

Hi Bibish,

Have had a look back here several times and as this is beginning to intrigue me, I'd like to investigate this a little further.. It has been some time since I worked on AIX, but I did do a fair bit with 5.3 and 6.1 back in the day.

There are some things that you should be aware of, as far as the page and swap goes along with the run queue and the CPU I/O wait. These parameters are heavily interdependent in AIX, quite often giving rise to apparent performance issues where there aren't any.

So having read over a report that I prepared about 30 months ago, for a group of AIX systems with around 15K users - I'd like to clarify a couple of things. These are just simple info gathering steps!

Is there a perceivable degradation in performance when the swapping happens?

Is the problem repeatable in any shape or form?

Does the reboot always clear the problem?

Regards

Dave

Hello Dave,

We havnt noticed any performance impact but the paging utilization keep on increasing and eventually we have to restart the application every day to bring it back to normal.

This issue we are monitoring every day for couple of weeks now but with same application with other AIX 5.3 server even with less physical memory utlizing only 2-3% ram in the environment.

yes restarting the application or restarting the system always clear this issue.

Bibish