Originally posted by: SystemAdmin

After we upgraded to SP6 on TL5 we have experienced poor performance. Any suggestions?
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Originally posted by: SystemAdmin

I'm afraid you're going to have to give us more to work with than that! What do you mean by good and bad performance? What symptoms are you experiencing? What hardware? What other software and applications?
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Originally posted by: SystemAdmin

IBM P660 server running AIX 5.3 and Oracle 10gr2 database with Oracle E Business suite. CPU usage has increased from 65% usage to 95% usage. It appears to be within the Workflow of PO's and Oracle Reports appear to be running slower.
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Originally posted by: SystemAdmin

OK, now we're getting somewhere. I assume you mean that overall CPU busy has increased 65->95%. Has I/O remained unchanged at the same time? If so, what you need to do is figure out where the increase is happening. Do you have data from before and after the change for comparison? Sar, process accounting and nmon data would be most useful. Firstly you need to know whether the increase is in kernel model CPU or user mode. If it's user mode then mostly likely something has changed in your workload. If it's kernel mode (the more likely case) then it's the AIX change that's biting you. In that case you need to turn to profiling tools (gprof, pprof, prof and tprof) to elucidate. If before-after comparison identifies particular processes you can profile them. Otherwise you'll have to profile the whole system. Have a look at chapter 19 of http://www.redbooks.ibm.com/abstracts/sg246039.html for complete details.

HTH

Jim Lane
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Originally posted by: Silvan

We are seeing the same in the overall usage of a p590 system. We have installed new hardware (memory,cpu,io draw) and updated the microcode to the newest available. We also upgraded AIX53. Since mid of April (the change on the hardware platform) we are seeing more cpu usage on the complete "cluster" than one month before. The actual systems were just upgraded and booted afterwards.

Thanks for those tools you mentioned before. Will see if we find something out about the usage-increase.
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Originally posted by: SystemAdmin

One thing to consider is to compare the tuning values before and after the reboot.it may give some interesting clue?
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Originally posted by: SystemAdmin

Hello -

We just upgrade to 5.3 TL5 with SP6 and we are having peformance issues with our SAP system as well.

Can you please tell us if you revolved your problem?
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Originally posted by: Silvan

Hi,

we have not found out any reason for the bad performance of TL5. Though at the moment time is a bit short to do the deep investigations on the system.
I will keep you updated if I find anything useful.
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Originally posted by: SystemAdmin

We had some performance issues after applying 5.3 TL05. There is a known issue on 5.3. APAR IY91836: XMWLM CONSUMING EXCESSIVE CPU. When you did the upgrade, the following could have been enabled in the /etc/inittab file:
xmdaily:2:once:/usr/bin/xmwlm -L 2>&1 >/dev/null

Check to see if this is running (ps -ef | egrep xmwlm). If you don't need the tool comment it out from inittab (using ":"). If you do, there is an apar.
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Originally posted by: Silvan

Thanks, we noticed this process running on our systems already. Though I have not thought about the software being so cpu-consuming.
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