topic Re: ulimit in Operating System - HP-UX

ulimit

Anil Raj_1 — Tue, 26 Oct 2004 14:37:22 GMT

Hi All,

Can I know more about 'ulimit'

Thanks

Anil

Re: ulimit

Deoncia Grayson_1 — Tue, 26 Oct 2004 14:42:52 GMT

ulimit command is used to limit user resources. If you used the -a opton is lists current resource limits. Its very useful if you want to specify a limit for resources,
ex: if you don't want the shell to create a core file larger than 1024 blocks , you can use the following command:

ulimit -c 1024
ulimit -a

Re: ulimit

John Poff — Tue, 26 Oct 2004 14:43:42 GMT

Hi,

The 'ulimit' command lets you set or display resource limits.

One place to find out about it is in the man page for the POSIX shell. Do a 'man sh-posix' and search for 'ulimit'.

JP

Re: ulimit

A. Clay Stephenson — Tue, 26 Oct 2004 14:45:08 GMT

Not unless you define it a bit better. Are you referring to the file size ulimit? (most common); core dump limit? number of file descriptors? limit of stack or data areas?

Ulimit can apply to all of these and it epends upon which shell you are running as to how many of these can be changed. There are also "hard" limits (set in the kernel) which cannot be exceeded and "soft" limits which can be increased up to the "hard" value. Man sh-posix (search for ulimit) and man 2 ulimit for details. These man pages should tell you everything you need to know -- or at least get you to the point of better asking your question.

Re: ulimit

RAC_1 — Tue, 26 Oct 2004 14:46:01 GMT

man sh-posix for details.
ulimit -Sa -- to know soft limits
ulimit -Ha -- Hard limits

ulimit -c xx (core file size)
ulimit -n xx (no. of file descriptors)
ulimit -s xx (stack size)
ulimit -d xx (data size)
ulimit -f xx (file blocks)
ulimit -t xx (time in secs)

Anil

Re: ulimit

G. Vrijhoeven — Tue, 26 Oct 2004 14:46:40 GMT

Hi Anil,

ulimit, for the korn shell:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90046/B2355-90046_top.html&con=/hpux/onlinedocs/B2355-90046/00/01/120-con.html&toc=/hpux/onlinedocs/B2355-90046/00/01/120-toc.html&searchterms=ulimit&queryid=20041026-133909

ulimit system call:
http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B3921-90010/B3921-90010_top.html&con=/hpux/onlinedocs/B3921-90010/00/11/1167-con.html&toc=/hpux/onlinedocs/B3921-90010/00/11/1167-toc.html&searchterms=ulimit&queryid=20041026-134440

HTH,

Gideon

Re: ulimit

Geoff Wild — Tue, 26 Oct 2004 14:53:26 GMT

You sure can:

ulimit - get and set user limits

You can also use it to limit the size of core dumps:

To completely suppress core dumps:

Bourne-style shells: "ulimit -c 0"
C-style shells: "limit coredumpsize 0"

If you want to limit dumps to a specific size, specify a number instead of 0, in blocks for Bourne-style shells, or kilobytes for C-style shells.

Rgds...Geoff

BTW : a google for ulimit unix returns 29,800 pages.

Re: ulimit

Anil Raj_1 — Tue, 26 Oct 2004 15:09:03 GMT

hi all,

thanks for the info.

regards
Anil