On Mar 25, 2010, at 8:59 AM, Fritz Borgstedt wrote:
> ASSP development mailing list <assp-test@lists.sourceforge.net>
> schreibt:
>> Does anybody know a solution for me?
>
> ulimit -a
>
> ulimit -u
I can not remember all the details, but keep in mind, on OS X, ulimit is a bit
more mysterious that on other nix's. ulimit and sysctl do not seem to be as
relevant on OS X. Default max values are terribly low, something like 256,
which you can adjust higher, but also will hit a wall with the kernel stopping
you from going anywhere near the ~65K some other OS's are able to.
On OS X 10.5 and above I believe, 10.6 for certain, you need to use:
launchctl limit
This defaults to:
cpu unlimited unlimited
filesize unlimited unlimited
data unlimited unlimited
stack 8388608 67104768
core 0 unlimited
rss unlimited unlimited
memlock unlimited unlimited
maxproc 266 532
maxfiles 256 unlimited
To adjust:
launchctl limit maxfiles user max system max
For example:
launchctl limit maxfiles 2048 unlimited
These changes will not stick past a reboot until you put them in:
/etc/launchd.conf
For one of my machines, I put this in the launchd.conf file:
limit maxfiles 4096 unlimited
And remember, this is all launchd controlled, so you need to either reload the
launchd item, or restart to get the changes to take effect.
I do not remember what the max values are that are compiled into the kernel,
and I believe OS X will happily take a larger value in a conf file, even
telling you that value is the one being used, but the lower kernel value will
be the one holding true. Don't quote me on that, please do your research
first, I am going on information I had to find a year ago in a hurry to solve a
problem and did not docuemnt it well.
What I remember taking away from it is, that Mac OS X has a hard limit that is
rather low, and starts with an even lower default value than what would be
useful on any "server" type of deploy.
If all these dying ASSP's were on Mac OS X, I would say that we need to look
there, but it is apparently happening on other OS's as well. Either way, if
ASSP is to support running on OS X, it will have to be pretty friendly to
number of files values.
Hope this sheds some light onto have Mac OS X deals with this, as it is
entirely different than linux, but probably identical to some of the BSD's.
Granted, I bet most of those BSD's compile with much higher defaults.
--
Scott * If you contact me off list replace talklists@ with scott@ *
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