This MustGather document is meant to assist AIX Administrators with collecting AIX performance data needed when opening a support case with AIX System Performance team.
- Problem description
- The perfpmr data collection
- What is the exact nature of the performance problem? (For example, slow system response times, longer than normal batch job completion times, slow backups, performance metrics reported by the OS or applications.)
- When did the performance issue first appear?
- Is there just one partition impacted by this slowdown? If not, How many other partitions are impacted? Are the impacted partitions on the same frame?
- Were there any changes made to the hardware, application, operating system, or network before the problem first appeared? If so, provide details of the changes that were made.
- Does the performance issue constant, or intermittent? If intermittent, how often are you seeing it happen?
- How long does the slowdown last? (hours, minutes).?
- Can the slowdown issue be reproduced on demand?
- Is recovery possible? Does system or application performance return to normal without user input? How long does it take to recover?
- Have you used any monitoring tools such as vmstat, iostat, lparstat, to help identify the bottleneck? If you ran these commands during the slowdown, provide a timestamp of the slowdown period, and provide the output from those commands. You can upload this data as a test case.
- Have you engaged other vendors (for example, EMC, Oracle, etc) to help resolve this issue?
- If the issue is related to a batch job, how long does it take for the batch job to complete? Provide both batch job run times and slow run times. (Specify the time differences in seconds, minutes, hours)
- How often does the batch job in question run, once per day, once a week?
*You must collect perfpmr data at the time the system is experiencing slowness.*
Download the perfpmr data collection script from the following link:
- AIX 6.1 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf61/perf61.tar.Z
- AIX 7.1 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf71/perf71.tar.Z
- AIX 7.2 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf72/perf72.tar.Z
- AIX 7.3 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf73/perf73.tar.Z
- AIX 6.1 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf61/README
- AIX 7.1 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf71/README
- AIX 7.2 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf72/README
- AIX 7.3 https://public.dhe.ibm.com/aix/tools/perftools/perfpmr/perf72/README(same as 7.2)
- Collect the VIOS perfpmr data at the same time you collect perfpmr on the client partition.
- Note: *Collect the perfpmr data during the slowdown.
- Run oem_setup_env for root access on the VIOS, then use the same perfpmr steps described for the LPAR client.
-Right click the specific LPAR
-Check the 'Allow performance information collection' box
- The change to "Allow performance information collection" is dynamic and does NOT require a reboot of the system.
- The change enables the lparstat command to display the number of processors in the shared pool.
Upload details are provided in the readme files. For convenience, these steps are summarized in this section.
Upload the yourcase#.pax.gz file created during the perfpmr collection by using one of the following options (a, b, or c)
a) Attach to your case
b) Upload to the Enhanced Customer Data Repository(ECuRep)
c) Upload to the Blue Diamond FTP server (Blue Diamond Customers Only)
* Note: For more information about doing a Blue Diamond upload, see:
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15 September 2022