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Check if buffers are in swap?

Marc DemhartnerSun December 31, 2023 07:50 AM

Hello, maybe last question of 2023 :-) I noticed slow downs during last week in our single instance ...

Art KagelSun December 31, 2023 09:15 AM

Look at the memfree and swaptotal versus swapfree lines in: $ cat /proc/meminfo ------------------------------ ...

Hrvoje ZokovicMon January 01, 2024 01:16 PM

Hello, you can find swap usage by process with (as root ofc): for x in /proc/*/status; do grep ...

Marc DemhartnerTue January 02, 2024 08:00 AM

Thanks. Looks like its the case.. i have many entries there with oninit 4784 KB How to prevent ...

Dennis MelnikovTue January 09, 2024 08:50 AM

Marc, Is vmstat showing any swapping activity? ------------------------------ Sincerely, Dennis ...

Andreas LegnerTue January 09, 2024 10:07 AM

It's typically not oninit process memory that's getting swapped, but rather allocated shared memory, ...

Marc DemhartnerWed January 10, 2024 07:59 AM

Yes, RESIDENT 1 is set. I also think buffers were in swap. I deactiaved swap totally and its even ...

Art KagelWed January 10, 2024 08:10 AM

Marc: You should be setting RESIDENT to -1. Setting it to '1' only sets the initial resident segment ...

Mark ScrantonMon January 22, 2024 10:23 AM

Art - I have a client whose boxes end up with "out of swap" condition(s) often. Haven't tracked ...

Andreas LegnerMon January 22, 2024 11:11 AM

Hi Mark, as you might guess from https://www.ibm.com/support/pages/apar/IC76872, this can result, ...

Mark ScrantonMon January 22, 2024 01:38 PM

Andres/Art - Thanks guys. And yes Andres - I need to start gathering (again) what's in swap ...

Art KagelMon January 22, 2024 12:09 PM

Mark: You have a quandary. AIX is based on BSD code rather than System V code. So AIX's handling ...

Marc DemhartnerThu February 01, 2024 09:00 AM

Even when setting it to RESIDENT -1 on RHEL8 it keeps swapping oninit proccesses oninit 5084 ...