topic Strange processes in HP-UX 11.31 in Operating System - HP-UX

Strange processes in HP-UX 11.31

Delcho Tuhchiev — Tue, 23 Dec 2008 10:28:04 GMT

Hi,

I've a machine with HP-UX 11.31 installed on it and I found that there is a lot of strange processes running (exactly it's one COMMAND runned a lot of times).This command is "net_str_cached" and it is runned since last boot of the machine. When I count the processes of the net_str_cached:
ps -ef | grep net_str_cached | wc -l
257
Is this normal and what is exactly "net_str_cached"?

Re: Strange processes in HP-UX 11.31

Steven E. Protter — Tue, 23 Dec 2008 10:44:08 GMT

Shalom,

I found one link on this to a Japanese language page for HP's developers edge program.

It might be an application of some type that is hanging.

What user owns the application?

How much memory is it using?

Maybe there is a memory leak.
Memory leak detector: http://www.hpux.ws/?p=8
SEP

Re: Strange processes in HP-UX 11.31

Steven E. Protter — Tue, 23 Dec 2008 10:44:45 GMT

Correction: What user owns the process?

Sorry.

Re: Strange processes in HP-UX 11.31

Dennis Handly — Tue, 23 Dec 2008 10:44:57 GMT

What is the process tree for all of these net_str_cached processes?
UNIX95=EXTENDED_PS ps -Hef

Re: Strange processes in HP-UX 11.31

Delcho Tuhchiev — Tue, 23 Dec 2008 11:44:28 GMT

The owner of the processes is root and I think that this processes doesnot eat memory...(this processes are not in top 20 memory users) What about the memory leak I think there is but it is from oracle processes (I've run mem.mon and I will post the output when examination finish)

Re: Strange processes in HP-UX 11.31

Jeeshan — Tue, 23 Dec 2008 11:44:38 GMT

you can use lsof to track the program or file that is accessing.

Re: Strange processes in HP-UX 11.31

Delcho Tuhchiev — Tue, 23 Dec 2008 11:47:03 GMT

I forgot to mention that I attached the file with the output of the forementioned "ps" command.

In your opinion is it safe to kill them?

Re: Strange processes in HP-UX 11.31

Jeeshan — Tue, 23 Dec 2008 11:58:27 GMT

you can better check with HP as I didn't find any docs or case regarding this.

Re: Strange processes in HP-UX 11.31

Dennis Handly — Tue, 23 Dec 2008 12:58:19 GMT

>The owner of the processes is root

These processes are created directly by the kernel, since their parent is 0, not 1.

>In your opinion is it safe to kill them?

Probably not. You might want to look for some configuration variable with the value 256.

Re: Strange processes in HP-UX 11.31

Delcho Tuhchiev — Tue, 23 Dec 2008 13:02:35 GMT

Hi All,

I've responce from HP so these processes are normal for HP-UX 11.31 and here is the description of the process:

* net_str_uncacheable_daemon - kernel daemon responsible for freeing
* uncacheable streams accumulated in each
* per-CPU uncacheable list

Thanks to All for the answares!!

Re: Strange processes in HP-UX 11.31

Delcho Tuhchiev — Tue, 23 Dec 2008 13:03:10 GMT

Solved