topic High Memory Utilization in Operating System - HP-UX

High Memory Utilization

wyunix — Fri, 25 Nov 2011 22:57:21 GMT

Hi,

(1) We have HP-UX 11.23 and 9000/800/rp3440 server with two node HA service guard cluster ( ServiceGuard A.11.16.00 )

(2) It is having 4G physical and 2GB VM and below is swap info

Swap Device                     Type        Avail       Used     Priority
--------------------------------------------------------------------------------
/dev/vx/dsk/rootdg/swapvol     device       8.0gb      373mb        1
pseudo-swap                    memory       4.0gb      2.1gb       -1

(3) Memory utilization consistently remain 99% on active node and we would like to reduce it to below warning level , atleast 85%

(4) while looking performance , I observed it is consumed by

(a)oracle

(b) cimserver -- 750 MB

(3)PD agent -- Backup agent for particular time .

(4) I suspect , cimserver is WBEM of HP which is consuming more memory

( a) what is actual use of CIMserver / services.

(b) What is effect/risk if we are not using/stop cimserver.

(5)

(a) Any kernel parameter requires fixing memory leak?

(b) Any other way to reduce memory utilization apart from reboot and memory upgrade? (Which is last option ).

Attached is top process consuming memory listed from glance

Please suggest, Thanks

Re: High Memory Utilization

Dennis Handly — Sat, 26 Nov 2011 13:50:24 GMT

>and below is swap info

Please provide the output of: swapinfo -tam

>(3) Memory utilization consistently remain 99% on active node and we would like to reduce it

Why bother, unless you are getting out of VM errors?

>(a) what is actual use of CIMserver / services. 750 MB

>(b) What is effect/risk if we are not using/stop cimserver.

It monitors hardware errors. You can at least stop and restart cimserver to see if it increases again.

>(a) Any kernel parameter requires fixing memory leak?

You haven't found a kernel memory leak. Perhaps one in cimserver?

>(c) Increasing swap / virtual memory. How this will be effective?

You can add swap without a reboot. This can tide you over the large memory use of cimserver.

Re: High Memory Utilization

Stephan. — Mon, 28 Nov 2011 10:03:22 GMT

As Dennis mentioned - cimserver is for hardware monitoring, the system can run without it as long you don't have a SIM Server or are using Insight Remote Support.

Older Versions from the cimserver are known to have memory leaks (especially the storage provider is one point), are you up to date with the patches and versions?

Simple restart fix it for a short time:

# cimserver -s

wait some seconds

# cimserver

Check Memory usage again ... if it start again allocating more and more memory check if there are updates available.

Every System running oracle has a memory usage > 80 or 90%, the oracle guys just grab what they can get - it is by design.