topic Re: Memory usage is very high in Operating System - HP-UX

Memory usage is very high

podichin — Thu, 10 Nov 2005 02:39:30 GMT

Hi All,

Am facing critical performance problem on a rp8420 server,

This server is running HPUX11i and informix database,

The server is having 24GB physical memory and 45GB Swap memory(Able to use only 32GB swap memory) , Because need to change Kernel paramters,

Still the physical memory and swap meomory usage is around 100% always, From kmem output i can see most of the physical memory and swap memory is using "oninit" process,

Am attaching kmeminfo command and swapinfo cammnd out put with this message,

Can anubody can guide me to verify is it related to OS memory leak or any application memory leak,

Thanks in advance,

Siju

Re: Memory usage is very high

RAC_1 — Thu, 10 Nov 2005 02:45:42 GMT

oninit are informix processes?? Right??
Whay there are so many of them?? Can you control bring it down to a reasonable number?? Also how buffer cache has been set?? Dynamic or Static?? If dynamic, what are your settings. (default dynamic buffer cahe is max 50 %. Which is a very bad setup.)

Also run following and post.

UNIX95= ps -ef -o vsz,pid,ppid,ruser,args|sort -nkrk1|head -20

This will give top 20 processes memory usage wise.

Re: Memory usage is very high

Fred.Wu — Thu, 10 Nov 2005 02:57:43 GMT

It's obviously an informix caused performance lack, there're too many informix processes, each one keep a large amount of memory.
I think you have to check if any parameter in informix can be optimized, and if so many database processes really necessary?

Re: Memory usage is very high

podichin — Thu, 10 Nov 2005 02:58:05 GMT

Hi Rac,

Thanks for your fast replay,
Buffer cache setting is 5 only,
dbc_max_pct 5 - 5
dbc_min_pct 5 - 5

and oninit processes are informix process only,

I tried to run the command your given, But i think there is some usage error on the sort side, It not executing,

Siju

Re: Memory usage is very high

Muthukumar_5 — Thu, 10 Nov 2005 03:04:55 GMT

Use RAC's command as,

UNIX95= ps -ef -o vsz,pid,ppid,ruser,args|sort -nrk1 | head -20

hth.

Re: Memory usage is very high

AwadheshPandey — Thu, 10 Nov 2005 03:06:00 GMT

check this link
http://docs.hp.com/en/5965-4641/5965-4641.pdf

Awadhesh

Re: Memory usage is very high

podichin — Thu, 10 Nov 2005 03:11:23 GMT

Hi Rac,
Please find the output,
33656 1854 1 root /opt/perf/bin/midaemon
23584 1890 1 root /opt/prm/bin/prm3d
19456 1889 1 root /opt/perf/bin/scopeux
13440 2434 2428 root /usr/lbin/cmcld -j
13228 9566 7169 informix oninit -s
13228 9545 7169 informix oninit -s
13228 9520 7169 informix oninit -s
13228 9509 7169 informix oninit -s
13228 9486 7169 informix oninit -s
13228 9464 7169 informix oninit -s
13228 9440 7169 informix oninit -s
13228 9420 7169 informix oninit -s
13228 9395 7169 informix oninit -s
13228 9374 7169 informix oninit -s
13228 9199 7169 informix oninit -s
13228 9181 7169 informix oninit -s
13228 9163 7169 informix oninit -s
13228 9139 7169 informix oninit -s
13228 9118 7169 informix oninit -s
13228 9098 7169 informix oninit -s
Siju

Re: Memory usage is very high

RAC_1 — Thu, 10 Nov 2005 03:14:57 GMT

The memory usage that you get with UNIX95 will not match with what you see in glance.

glance -g

Which processes are using most of the memory?? Also glance -m, Is user memory maximum compared to kernel memory??

Again, is there setting/configuration in informix with which you can control no. of informix processes??

Re: Memory usage is very high

podichin — Thu, 10 Nov 2005 03:26:05 GMT

Hi Rac,

System memory is 2.4GB and user memory is

20.1GB,

Oninit process memory usage is showing high

in glance also,

Siju

Re: Memory usage is very high

RAC_1 — Thu, 10 Nov 2005 03:33:20 GMT

All looks fine except that there are too many user processes causing you a problem. Unless you keep tab on it, you can not do anything.

Re: Memory usage is very high

Ted Buis — Fri, 11 Nov 2005 10:30:35 GMT

If you look at the pid and ppid numbers many have the ppido of 7169 which has a ppid of 5557 which has a ppid of 1. This means that init is the call that initial started it and it is driven by the text of /etc/inittab. I would look in /etc/inittab to make sure that if is correct, specifically the line for oninit. Other than that, if oninit comes from informix, then I was ask them. There are also many loaddb.4ge processes running. I wonder if this is normal?

Re: Memory usage is very high

Ivan_86 — Fri, 11 Nov 2005 12:50:09 GMT

Hi! podichin.!

Sorry, i no have answer for you, but you can helpme, tellme with that options you run the kmeminfo.?? Really you report its very util

Thanks.!