topic Re: vmunix: kthread: table is full in Operating System - HP-UX

vmunix: kthread: table is full

wangzhida — Tue, 21 Mar 2006 01:03:25 GMT

dear sir/madam:
after i login the system, it always returns "fork failed" whatever i typed in. so I had to restart the system.
I found some messages in OLDsyslog.log that I pasted below:
----------------------------------------------
Mar 20 23:28:56 cs_svr03 vmunix: kthread: table is full
Mar 20 23:29:40 cs_svr03 inetd[915]: ftp/tcp: accept: Bad file number
Mar 20 23:31:22 cs_svr03 vmunix: kthread: ta...
Mar 20 10:37:02 cs_svr03 ACEAGENT: Failed to create Thread.
-----------------------------------------------
I guess the reason may be related to system resource limits. but I don't know which parameter should I tune? could you give me a hand?

sincerely yours

Andy.

Re: vmunix: kthread: table is full

Muthukumar_5 — Tue, 21 Mar 2006 01:06:47 GMT

It is related with nkthread kernel parameter.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=63788

--
Muthu

Re: vmunix: kthread: table is full

Arunvijai_4 — Tue, 21 Mar 2006 01:10:00 GMT

Hi Andy,

Can you post the output of this ?

# kmtune -l -q nkthread

# kmtune -l -q nproc

In my system, it is

#kmtune -l -q nkthread
Parameter: nkthread
Current: 499
Planned: (((NPROC*7)/4)+16)
Default: (((NPROC*7)/4)+16)
Minimum: -
Module: -
Version: -
Dynamic: No

#kmtune -l -q nproc
Parameter: nproc
Current: 276
Planned: (20+8*MAXUSERS)
Default: (20+8*MAXUSERS)
Minimum: -
Module: -
Version: -
Dynamic: No

-Arun

Re: vmunix: kthread: table is full

RAC_1 — Tue, 21 Mar 2006 01:10:31 GMT

You might be hitting,nkthread or max_thread_proc parameter. check both.

Re: vmunix: kthread: table is full

wangzhida — Tue, 21 Mar 2006 01:14:18 GMT

Sorry. I forgot some informations might be helpful for solving the problem. some parameters' value are here.
maxusers = 512
max_thread_proc = 4096

Re: vmunix: kthread: table is full

wangzhida — Tue, 21 Mar 2006 02:20:50 GMT

hi, Arun
I've seen the problem. nkthread's value is 9458. it's even less than default value 17971 (((NPROC*7)/4)+16). the nproc is 10260.

Now I plan to reconfigure the kernel. Would you please have a look at the steps I wanna follow and correct it?
step 1: cd /stand; cp system system.prev
step 2: select "Process New Kernel" from the SAM action menu.
step 3: select "Move kernel into place"
step 4: select "Shutdown/Reboot System Now"

thanks!

Re: vmunix: kthread: table is full

Yogeeraj_1 — Tue, 21 Mar 2006 02:45:31 GMT

hi andy,

The steps are ok except:

step 1: cd /stand; cp system system.prev

i would also copy vmunix
e.g. cp vmunix vmunix.prev

just to be cautious...

kind regards
yogeeraj

Re: vmunix: kthread: table is full

Arunvijai_4 — Tue, 21 Mar 2006 03:03:38 GMT

Hi Andy,

To Reconfigure kernel, you can follow these steps,

1) Copy /stand/system & /stand/vmunix

2) /stand/dlkm

3) Use SAM to reconfigure and build kernel

4) Reboot using new kernel.

-Arun

Re: vmunix: kthread: table is full

Muthukumar_5 — Tue, 21 Mar 2006 03:18:59 GMT

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=63788

Refer mike tully's reply. It is telling all about kernel rebuild after parameter change.

--
Muthu

Re: vmunix: kthread: table is full

Arunvijai_4 — Tue, 21 Mar 2006 03:22:43 GMT

Hi Andy,

There are several threads discussed about how to reconfigure kernel, you do a search in ITRC,

http://www2.itrc.hp.com/service/james/search.do?searchtext=rebuild+kernel&submit.x=0&submit.y=0&hpl=1&todo=search&searchcriteria=allwords&from=forums&searchcategory=ALL&rn=25&presort=rank&source=7000&esc=us.support.itrc.hp.com&wpa=forums1.itrc.hp.com%3A80&origin=0&chkServStor=on

-Arun