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From:Philipp Date:March 16 2003 7:49pm
Subject:Process Limit on Linux ?
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Hi there,


i wrote several times to the list asking for help with a problem
regarding process limits on linux, but never got an answer.
today i found this story:

http://www.mysql.com/press/user_stories/handy.de.html

here are the relevant sentences:

"We had some process limit problems on our Linux Systems,
but thanks to your support we where able to patch the linux boxes
and move the limit to a size that meets our needs (we've got an average of
about
1600 concurrent threads per server)."

These people use 2.2 Kernels so i dont know if the mentioned kernel and
glibc
patching is also relevant for me, as i am using 2.4 kernels only.

Here is my problem in detail:

i am using mysql-3.23.55 binary packages on linux 2.4.20 and i raised ulimit
values and configuration in my.conf to allow more then 1500 threads. but
when
there are around 750 threads a new client connecting is told something like
that (dont have the errno at the moment, i think its 11):

"cant create new thread, perhaps you are out of memory or there is a
os-depended bug".

The machine only runs apache and mysql and is a Xeon 2x2 2.4 Gz with 2 GB of
RAM.
cat /proc/meminfo sais that more then 1 Gig is used for caching, so memory
should be no
problem .


Please, if you have any ideas, let me know. If it is a kernel issue, tell me
to go to linux mailing lists
or if its some kind of "secret issue" only the support will be able to
answer let me know that.


Thanks in advance,
Philipp


Thread
Process Limit on Linux ?Philipp16 Mar
  • Re: Process Limit on Linux ?walt17 Mar
  • Re: Process Limit on Linux ?Philipp18 Mar
    • Re: Process Limit on Linux ?Joseph Bueno19 Mar
      • Re: Process Limit on Linux ?Philipp19 Mar
        • Re: Process Limit on Linux ?Dan Nelson19 Mar
          • Re: Process Limit on Linux ?Philipp19 Mar
            • Re: Process Limit on Linux ?Joseph Bueno19 Mar
            • Re: Process Limit on Linux ?Dan Nelson19 Mar
              • Re: Process Limit on Linux ?walt19 Mar
  • Re: Process Limit on Linux ?Philipp18 Mar