topic Re: sysmap overflow in Operating System - HP-UX

sysmap overflow

Scott E Smith — Tue, 17 Oct 2000 17:08:23 GMT

Has anyone had any ongoing issues with HP-UX 10.20 and sysmap fragmentation. I've had 4 system panics in the last 30 days. It's an ongoing issue that HP seems to be unable to correct. Thanks

Re: sysmap overflow

Ken Scharpell — Tue, 17 Oct 2000 17:22:45 GMT

Sysmap fragmentation is not such an issue that you cant get around it by increasing it (upping nproc) to a sufficiently high number that it wont get so fragmented and/or reducing the size of ninodes (which can cause the fragmentation). We get sysmap overflow messages occasionally, but never to the extent that the above doesnt fix it so we never get any panics.

Re: sysmap overflow

Rita C Workman — Tue, 17 Oct 2000 17:35:00 GMT

Here's a url I've sent before that goes into alittle detail about this. Suffice it to say your having a bit of a memory leak, probably small and generally upping nproc will help clear it up....but here's the doc in case you want to read it over:

http://us-support.external.hp.com/cki/bin/doc.pl/sid=b2ee420e07ade3c6bd/screen=ckiDisplayDocument/distrib_redir=0+971807603|*?docId=200000049380345

Regards,

Re: sysmap overflow

Scott E Smith — Tue, 17 Oct 2000 17:40:02 GMT

We've attempted to increase this parameter but the new kernel won't boot.

Re: sysmap overflow

Rita C Workman — Tue, 17 Oct 2000 17:42:53 GMT

What exactly was the error???

Re: sysmap overflow

Ian_4 — Tue, 17 Oct 2000 18:05:29 GMT

See http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0xc0687e990647d4118fee0090279cd0f9,00.html
This was an earlier chat on similar issue.

If you provide me with output of the following command I maybe able to help.

echo cpu_has_var_size_pages/D | adb /stand/vmunix /dev/kmem

/usr/lbin/sysadm/system_prep -s /tmp/kerparam

Ian

Re: sysmap overflow

Lawrence Mahan — Wed, 18 Oct 2000 16:45:40 GMT

HP-UX 10.20 has a problem when you inlarge the kernel. If it gets to large do to larger paramaters it will not boot. THis can be fixed by applying patch PHKL_14280