Category Archives: AIX

Graphing ilcs in Grafana

Posted on October 11, 2023 by morsing

Graphing of ilcs in AIX is not included in the nimon data output because ilcs comes from the mpstat command and ilcs is not part of the perfstat library that njmon uses. ilcs is “Involuntary Logical CPU switches” and occurs … Continue reading →

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Unable to increase MaxLPs for LV

Posted on August 18, 2023 by morsing

As part of growing filesystems on AIX, you often hit the message: which is a bit of a legacy setting from the days of small disks and when you could not shrink filesystems. This is easily over-come by running chlv … Continue reading →

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Capacity and performance check script

Posted on May 19, 2023 by morsing

Another little script I wrote to check capacity aspects of an AIX LPAR. I call it capacity checks as it is basing most of the checks on counters and averaging out over 90 days. Some of this is based on … Continue reading →

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Script to change WWPNS in LPAR profile

Posted on November 3, 2022 by morsing

This is a script to interactively change WWPNs on adapters in an IBM POWER/Power systems LPAR profile. This is useful if you have to re-create adapters or even whole profiles as the HMC GUI does not allow you to set … Continue reading →

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Starting tactic script for CPU allocation calculations on POWER9/10

Posted on October 21, 2022 by morsing

Based on Earl Jew’s presentation on the 6th of October 2022, “Simplest starting tactic for Power10 AIX exploitation V1.2″. Excellent IBM POWER VUG materials can be found here: https://ibm.ent.box.com/s/6hn2orvig4r2peu6e39owmp07ewyyf4x And the meeting presentation replay here: https://ibm.ent.box.com/s/5atsp26sxup1ob04c3urbkiovj8epbax This is an analytic … Continue reading →

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NIM certificate issues?

Posted on September 26, 2022 by morsing

NIM is great, right up to the point where it stops working! Getting this error: This means the client certificate for nimsh isn’t working. You might have been Googling and be told nimclient -c or niminit might fix the problem, … Continue reading →

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Concurrent/parallel or sequential LPAR migrations

Posted on October 17, 2021 by morsing

When you run lslparmigr -r sys -m <system>, the value of “num_active_migr._supported” shows how many concurrent migrations are possible. For multiple partitions, LPAR names must be comma separated. The maximum number of partition names that can be specified is displayed … Continue reading →

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Removing Java 7 on VIO 3.1

Posted on October 17, 2021 by morsing

I asked IBM if I could remove Java 7 on our new VIO 3.1 instalattions, and rather than answer the question, they pointed me to this brilliant command: updateios -remove_outdated_filesets It happily removed old Java versions and a few other … Continue reading →

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NIM alt_disk_migration and p6 processor mode

Posted on February 8, 2021 by morsing

I was trying to do a NIM alt_disk_migration on a POWER7 LPAR form AIX 7.1 to 7.2 but the nimadm scripts kept stalling, but without outputting anything interesting, even in debug mode. In the end I gave up and tried … Continue reading →

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Updating fileset in lpp_source on NIM

Posted on February 5, 2021 by morsing

If you update your NIM server to a new TL level and you do alt_disk migrations from this NIM server on client servers on lower levels, you need to update the bos.alt_disk.boot_images fileset in both the LPP sources and SPOTs … Continue reading →

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