topic Swap Error in Operating System - HP-UX

Swap Error

SSP_1 — Fri, 28 Dec 2001 09:07:02 GMT

Hi Forum,

Getting following error appended to /var/adm/syslog/sysl* file on our HP9000/A500 Box :-

Dec 28 14:36:32 apps vmunix: Deferred swap reservation
failure pid: 1905^M

I have enough swap space on my box. The result of "swapinfo" is attached herewith this message.

Please suggest a way.

Re: Swap Error

Steven Sim Kok Leong — Fri, 28 Dec 2001 09:17:24 GMT

Hi,

Refer to this posting:

http://bizforums.itrc.hp.com/cm/QuestionAnswer/0,,0x7ebb53921f1ad5118fef0090279cd0f9,00.html

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

Re: Swap Error

T. M. Louah — Fri, 28 Dec 2001 09:32:09 GMT

.. 'swapinfo -ta' would have been better !
.. Is the msg reported for different PIDs?
.. did the system Panic? if yes, then use Q4 to do a trace & send the results to the response center.

Nevertheless, looks like system ran out of the virtual space. I would suggest to double the swap space used - (twice as much as the RAM).

.. you need to investigate more on your processes, partically the total virtual space used by each process. If the above suggestion didn't fix the issue, consider to logg in an ITRC call with the Response Center for further problem isolation.

T++

Re: Swap Error

SSP_1 — Fri, 28 Dec 2001 09:48:44 GMT

Hi Friends,

Right now we r in the process of rebooting the system. But at the same time could anyone of you pl let me know what are the patches we have for hpux11.00[hp9000/A500] os to fix the memory leak problem?

Re: Swap Error

John Bolene — Fri, 28 Dec 2001 14:14:28 GMT

Memory leak for what? I don't have any memory leaks.

More info required!

Thanks

Re: Swap Error

John Palmer — Fri, 28 Dec 2001 14:36:45 GMT

Hi,

The system process 'mib2agt' is the classic HP-UX 11.00 memory leaker.

Either patch PHSS_21046 or the newer PHSS_23670 fixes it.

Regards,
John

Re: Swap Error

Krishna Prasad — Fri, 28 Dec 2001 15:08:28 GMT

You are getting the error because you are somewhat low on memory because you are swapping some. The combination of what you have left in reserve and swap space is not enough to allocate for new processes.

You need to either add more swap.
add more memory.

or

Find out what is using the memory/swap. I have been able to increase the size of the Oracle SGA or SAP shared memory parms. This allocates more memory up front but lets the applications store more memory before it needs to swap or allocate more memory.

I am not sure what applications your are running on your machine or if you use shared memory?

Just some things I have ran into.

Re: Swap Error

Sridhar Bhaskarla — Fri, 28 Dec 2001 15:14:52 GMT

Hi Shripad,

I would be interested to see what's the size of your new process is. Your system is obvioulsy running short of memory. And everytime, you start a new process, the system will reserve space in the swap and looking at your swapinfo you have got only 340MB of free swap left. If by any change, the reserve required to open the process is more than 340MB, it will throw away.

So, I suggest you increase your memory a bit so that the swap utilization on your device swaps will become less.

And also the other suggestions like updating new mib2agt, diagnostics are also worth considering.

-Sri