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Re: File handle limit?


I still have a problem if the normal operation of my server (which tests are simulating) requires more file descriptors than I am given. From my perspective OSX is making it harder for me to get what I want by giving child processes a smaller file handle limit than the soft limit I have defined in the parent shell (e.g., by setting default to MAX_OPEN). I'm not clear what purpose this serves.

If the soft limit is reachable (i.e. at or below hard-limit and maxfilesperprocess and maxfiles), then the soft limit should be inherited by the shell's child process.

If the soft limit is unreachable, i.e. above hard-limit or maxfilesperprocess or maxfiles, then the soft limit will be capped at the max reachable value.

I have never observed anything different from Mac OS X, using either the shell's ulimit or using other means (e.g. child processes spawned after Suite/P code changes hard or soft limits).

If you have a fail-case, please provide specific steps to reproduce it, including any prior changes made to /etc/sysctl.conf.

Just because a hard-limit returns "unlimited" does not mean it really is unlimited.

Also, the 'ulimit' builtin changes both hard and soft limits unless told otherwise.

Finally, hard limits for a process can only be decreased, not raised, unless the process is running as root. See 'man setrlimit' and find the word "irreversibly". Remember this when using 'ulimit' without -S.

  -- GG

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