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high kernel memory usage

 
Asim_4
Occasional Advisor

high kernel memory usage

HPUX 11.31 IA64Bit 16Gb Physical Memory
Running Oracle RAC
Sys: 5.9gb User: 8.5gb Free: 878mb
there are no page outs at this time, however my fear is if i do not get a good handle on memory usage my system may get into performance issues.
7 REPLIES
Kapil Jha
Honored Contributor

Re: high kernel memory usage

Hey Asim,
How r you ;)

Which process shows higher memory utilization from glance.

what about page faults??

Any RAC performance issue??

BR,
Kapil+
I am in this small bowl, I wane see the real world......
Asim_4
Occasional Advisor

Re: high kernel memory usage

i am good.thanks for asking. here glance output.
MEMORY REPORT Users= 4
Event Current Cumulative Current Rate Cum Rate High Rate
--------------------------------------------------------------------------------
Page Faults 2108 2880 430.2 450.0 551.4
Page In 453 604 92.4 94.3 107.8
Page Out 0 0 0.0 0.0 0.0
KB Paged In 560kb 1.5mb 114.2 241.2 702.8
KB Paged Out 0kb 0kb 0.0 0.0 0.0
Reactivations 0 0 0.0 0.0 0.0
Deactivations 0 0 0.0 0.0 0.0
KB Deactivated 0kb 0kb 0.0 0.0 0.0
VM Reads 67 197 13.6 30.7 26.5
VM Writes 0 0 0.0 0.0 0.0
Total VM : 10.0gb Sys Mem : 5.9gb User Mem: 8.9gb Phys Mem : 16.0gb
Active VM: 3.7gb Buf Cache: 0mb Free Mem: 803mb FileCache: 378mb
Kapil Jha
Honored Contributor

Re: high kernel memory usage

Is this new server, any changes on this box.
I asked which process is taking more memory.

Have you tried to reboot the box earlier.

BR,
Kapil+
I am in this small bowl, I wane see the real world......
Asim_4
Occasional Advisor

Re: high kernel memory usage

there are no changes made recently, as far as your question is concerned, i am trying to figure out the same thing, further i also want to understand the high kernel memory usage and if there is anyway i can reduce the usage without causing any issues.
Hasan Atasoy
Honored Contributor

Re: high kernel memory usage

hi asim;

did you change file_cache_max and file_cache_min values ?


Hasan
Asim_4
Occasional Advisor

Re: high kernel memory usage

here is the relavent info:
> kctune |grep filecache
filecache_max 1630976819 10% Imm (auto disabled)
filecache_min 815484928 Default Auto
Rahul Rai_1
Frequent Advisor

Re: high kernel memory usage

Hi Asim,

Did you faced the same problem earlier for memory issue.
What is the size for Oracle SGA was there any change in SGA.
And if any other activity going on the server from oracle point of view.(RMAN backup etc)
Can you post swapinfo -atm
seems lil connection with swap.

Which process from glance is occupying maximum memory?

Regards,
Rahul Rai.