topic Re: Open files per process in Operating System - HP-UX

Open files per process

Brian Lee_4 — Mon, 07 Jun 2004 13:59:22 GMT

Is there any command or tool to find out that certain process opens how many files.

I had some issue with kernel parameter, nfile.
When open files reach the value of nfile, I can't telnet into the system.
I tried to find which process opened how many files but I couldn't.

Please help me out.

Re: Open files per process

harry d brown jr — Mon, 07 Jun 2004 14:06:29 GMT

lsof

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.70/

live free or die
harry

Re: Open files per process

Pete Randall — Mon, 07 Jun 2004 14:07:29 GMT

Brian,

Sounds like a job for lsof. For 64 bit 11i: http://the-other.wiretapped.net/security/host-security/lsof/binaries/hpux/B.11.11/

For 11.0:
http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.70/

Pete

Re: Open files per process

Sridhar Bhaskarla — Mon, 07 Jun 2004 14:07:33 GMT

Hi,

You will have to install 'lsof' to find out the open files on the system. Simply use

lsof > lsof.out

Then sort out through second column. It is the pid of the process. You can write a small script to find the number of open files per process.

-Sri

Re: Open files per process

Fred Ruffet — Mon, 07 Jun 2004 14:08:54 GMT

lsof is a great tool, and may easily be included in scripts, but if your action is done only once, and have glance already installed, it can give you the info.

regards,

Fred

Re: Open files per process

Tim D Fulford — Mon, 07 Jun 2004 14:13:45 GMT

dont you just hate it when 4 people get there before you... lsof... But I guess yopu got the idea!!

Tim

Re: Open files per process

Camel_1 — Mon, 07 Jun 2004 15:34:31 GMT

GLANCE always is an option to check the process details.

Simon

Re: Open files per process

Sanjay_6 — Mon, 07 Jun 2004 15:40:47 GMT

Hi,

Your problem may not be due to the no of processes, but could be due to the limit being reached on the number of telenet sessions allowed on the box.

Try this to identify yout problem and see if it can be due to something other than the limit on the no of files / processes.

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000072193612

The ITRC doc id is KBRC00014017.

Hope this helps.

Regds

Re: Open files per process

Bill Hassell — Mon, 07 Jun 2004 21:05:27 GMT

Very important: nfile may be the originaql default value, jut a few hundred. It can be set to thousands or tens of thousands. Just run SAM and change the value. Remember that every process uses a minimum of 3 files (stdin, stdout, stderr) plus whatever the program needs. If you have 200 processes running, you can figure that nfile needs to be at least 1000. But to be sure, look at sar -v 1. The file and proc columns will show you the current values and maximum values. Your system is capable of running 10 or 100 times more processes--just adjust the kernel parameters.

Re: Open files per process

Brian Lee_4 — Tue, 08 Jun 2004 10:15:16 GMT

I tried to install C compiler before I installed lsof but it requires "gmake".
Please let me know where I can get the program.

Re: Open files per process

Steven E. Protter — Tue, 08 Jun 2004 10:31:18 GMT

Just a note: If you run into a situation where nproc is set high but a given user or job can't seem to open enough processes.

check kernel parameter maxuprc

max processes per user.

It defaults to 75 and that can be a problem once in a while.

SEP

Re: Open files per process

Manish Srivastava — Tue, 08 Jun 2004 10:32:35 GMT

Hi,

You can try this site...

http://software.hp.com/portal/swdepot/displayProductInfo.do?productNumber=HPUXIEXP1123

manish

Re: Open files per process

harry d brown jr — Tue, 08 Jun 2004 10:37:02 GMT

Brian, Don't build it, just download the RUN TIME depot and install it:

http://hpux.cs.utah.edu/ftp/hpux/Sysadmin/lsof-4.70/lsof-4.70-sd-11.00.depot.gz

put it on your server, then gunzip it:

cd /opt/
gunzip lsof-4.70/lsof-4.70-sd-11.00.depot.gz
swinstall -s /opt/lsof-4.70/lsof-4.70-sd-11.00.depot

live free or die
harry

Re: Open files per process

Brian Lee_4 — Tue, 08 Jun 2004 13:17:47 GMT

After I install lsof depot, I run "lsof > lsof.file" command but I get the following error.

can't read proc table info

please help me

Re: Open files per process

harry d brown jr — Tue, 08 Jun 2004 13:31:13 GMT

are you root ?

Is the OS HPux 11i (11.11v1) ?

What would you say your patch level is on your system ?

live free or die
harry

Re: Open files per process

Brian Lee_4 — Tue, 08 Jun 2004 13:36:38 GMT

yes, it is 11iv1
patch: sep, 2003