[haiku-development] Re: How to increase files limit?
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Sat, 24 Apr 2010 17:22:01 +0200
On 2010-04-24 at 15:25:40 [+0200], Ingo Weinhold <ingo_weinhold@xxxxxx>
wrote:
> On 2010-04-24 at 14:43:59 [+0200], Andreas Färber <andreas.faerber@xxxxxx>
> wrote:
> > I've been playing with Subversion 1.7.0 (r936039, r937623) and for non-
> > trivial stuff keep getting errors like this:
> >
> > svn: Can't open '/tmp/svn-tempfile.2.tmp': Too many open files
> > svn: unable to open database file
> >
> > This is reproducible by running:
> >
> > svn co svn://anonsvn.mono-project.com/source/trunk/mcs
> >
> > As well as by subsequent `svn cleanup` and `svn up`, or by `svn
> > upgrade` on a previous repository. With 1.6.x this didn't occur, so I
> > suspect this is related to their upgrade of the repository format and/
> > or their use of SQLite (here 3.6.23.1).
> >
> > On Linux it would be possible to do something like `echo 1024 > /proc/
> > sys/kernel/file-max` or `ulimit -n 1024`. On Haiku the latter results
> > in:
> > sh: ulimit: cannot modify limit: Operation not allowed
> > How can we achieve the equivalent on Haiku? Is there something like
> > NR_FILE defined in the kernel?
>
> Haiku supports setrlimit() and RLIMIT_NOFILE, but not all RLIMIT_*
> constants. bash's config.h doesn't define HAVE_RESOURCE, which is why
> setrlimit() isn't used at all. Defining it may or may not work.
Now I see, config-bot.h defines HAVE_RESOURCE. Very inventive.
On 2010-04-24 at 16:37:08 [+0200], Jérôme Duval <korli@xxxxxxxxxxxxxxxx>
wrote:
> 2010/4/24 Andreas Färber <andreas.faerber@xxxxxx>:
> > On Linux it would be possible to do something like `echo 1024 >
> > /proc/sys/kernel/file-max` or `ulimit -n 1024`. On Haiku the latter
> > results
> > in:
> > sh: ulimit: cannot modify limit: Operation not allowed
> > How can we achieve the equivalent on Haiku? Is there something like
> > NR_FILE
> > defined in the kernel?
>
> ulimit has a soft value and a hard value. On Haiku, the hard limit is
> 8192 and fixed, hence the Operation not allowed message.
> You can however set the soft value with `ulimit -Sn 1024`.
The specs for setrlimit() say that the appropriate privileges are required
to raise the hard limit. Interestingly enough "ulimit -n ..." works fine
under Linux when run as a normal user. I suspect we're doing something wrong.
CU, Ingo
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