From: Myers, Drew (MyersD@GOALAMO.COM)
Date: Thu Feb 27 2003 - 09:26:03 EST
I'm guessing the system load is such that you can't tune to prevent paging?
-----Original Message-----
From: Holger.VanKoll@SWISSCOM.COM [mailto:Holger.VanKoll@SWISSCOM.COM]
Sent: Thursday, February 27, 2003 9:15 AM
To: aix-l@Princeton.EDU
Subject: accessing a system with high load
Hello,
I am thinking about what to do to ensure access to a system where some
application uses that much paging-space that connections (telnet/ssh/getty)
cant be made anymore (fork fails).
Aix5.1 has the ability (shconf) to do certain things if certain-priority
apps dont get cpu anymore.
Also, one could start a high-priority ssh-daemon on bootup.
Thats fine, but I solves the problem when applications consume too much cpu.
That doesnt help if they consume too much paging-space.
As far as I see even ulimit/wlm has no way to solve this problem.
I could try to start sshd with plock(); but that would only get sshd up
running... any command started from there still fails (fork - not enough
memory available now).
So far, I see no other possibility than to increase paging-space and set
high values for npswarn and npskill (vmtune).
The only disadvantage I currently see is more disk-usage for paging-space.
What do you think / what do you do to ensure access to a high-paging system?
Regards,
Holger
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