kernel option to increase max open files

[Sunil Sunder Raj]

Hi,
Run sysctl -w kern.maxfiles=#### to what ever value is needed. To get it 
updated at startup you can put a line like "kern.maxfiles=####" in 
/etc/sysctl.conf to have the change on every reboot. You may also have to 
edit /etc/login.conf and adjust any "openfiles=####" lines that might be 
lowering the per-process limit.

By default the openfiles value is unlimited OR infinite.

Regards
SSR


>From: John Fox <readbsd at mind.net>
>To: freebsd-questions at freebsd.org
>Subject: kernel option to increase max open files
>Date: Thu, 16 Oct 2003 10:09:14 -0700
>
>Hi, folks.
>
>I've got a 2.2.2 machine which I can't currently upgrade, due to funding
>issues.  This machine handles a lot of mail, and I am lately finding
>dmesg output to be full of "file: table is full" messages, and entries
>like these in the sendmail log:
>
>    SYSERR(UID0): readqf: cannot open dfAAA29006: Too many open files in \
>    system
>
>    SYSERR(UID0): Cannot open hash database /etc/aliases: Too many open \
>    files in system
>
>So I figure I need to increase the max number of open files available.
>
>I've looked around, and it appears I have two different options:
>
>1) Kernel option "options         OPEN_MAX=###" which sets the max number
>of open files per user (which would be 'root' in this case, as that's who
>sendmail runs as).
>
>2) a login.conf class setting assigned to root.  The 'openfiles' setting 
>seems
>somewhat equivalent to the OPEN_MAX option.  However, I am not certain
>that limits set in login.conf apply to a process being run by a user that
>didn't log in (sendmail being started by init at boot, rather than from
>root's login session).
>
>
>I welcome any thoughts/advice on this matter, as I don't want to try either
>of these changes without having done due diligence.
>
>Thank you,
>
>
>-John
>--
>+---------------------------------------------------------------------------+
>| John Fox <readbsd at mind.net>   |  System Administrator   | InfoStructure   
>|
>+---------------------------------------------------------------------------+
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>|
>|         Galen: I don't. I have no surviving enemies...at all.             
>|
>|             -- "Crusdade", _Racing the Night_                             
>|
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