topic Re: Measuring shared memory in Operating System - HP-UX

Measuring shared memory

Simon R Wootton — Tue, 13 Apr 2004 02:18:07 GMT

Running HP11i on an RP7410 machine. Following the recent installation of Data Protector on the above machine, it appears that I'm running out of shared memory and therefore unable to open the application. Sometimes, I'm unable to run SAM and get the same error messages, but closing some of the system applications (eg. test systems) allows me to run SAM successfully.

The error messages were diagnosed by a seperate forum question and I have now increased the amount of shared memory on the machine from 128Mb to 160Mb. Unfortunately, I am still unable to run Data Protector.

Is there any way to measure the amount of shared memory being used by the machine in real time ? Also, is there anything else I can do to release shared memory to try and run Data Protector without having to increase it further which means another reboot on a machine that runs 24x7 ??

All help will be rewarded, thanks in advance.

Regards
Simon

Re: Measuring shared memory

Alex Glennie — Tue, 13 Apr 2004 02:45:17 GMT

I'd try the following it might work :

omnisv.sh -stop

/opt/omni/lbin/crs -clshm
/opt/omni/lbin/crs -shutdown
omnisv.sh -start

as to measurement : glance ? or shminfo (hp utility - would require a call to local Response Centre)

Re: Measuring shared memory

Simon R Wootton — Tue, 13 Apr 2004 03:26:05 GMT

Thanks for the reply Alex, can you please advise what these commands do before I issue them on a live server ?

Regards
Simon

Re: Measuring shared memory

Sanjiv Sharma_1 — Tue, 13 Apr 2004 03:57:20 GMT

Hi Simon,

Please check this document:
http://www.openview.hp.com/sso/ecare/getsupportdoc?docid=OV-EN015876

hth.

Re: Measuring shared memory

Sanjiv Sharma_1 — Tue, 13 Apr 2004 04:00:20 GMT

Hi Simon,

You can issue these commands on your live server w/o any concern. These commands will clear the shared memory and start the Data Protector.

Re: Measuring shared memory

Simon R Wootton — Tue, 13 Apr 2004 05:01:07 GMT

Hi Sanjiv

Thanks for the response. You say the commands clear shared memory - what about the other live applications using the shared memory - will they be affected ??

Regards
Simon

Re: Measuring shared memory

Geoff Wild — Tue, 13 Apr 2004 08:25:41 GMT

You can do a
ipcs -m
to Display information about active shared memory segments.

man ipcs for more info.

Rgds...Geoff

Re: Measuring shared memory

Alex Glennie — Tue, 13 Apr 2004 09:47:48 GMT

as to other live applications ... no affect just clears out/down the shared memory in use by DP/OBII in the case of memory leaks etc ...

appologies been busy today

Re: Measuring shared memory

Sundar_7 — Tue, 13 Apr 2004 10:56:28 GMT

Hi Simon,

Download the attached shminfo.sh which can be used to accurately determine the shared memory segments in use.

Sundar.