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Added warning about expense of forking/exec to determine system load. Added SEE ALSO links to the postings containing the plugin and an alternate.

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Richard Siddall 2014-03-21 09:56:32 -04:00
parent ab965b585c
commit aabefce3b9
1 changed files with 10 additions and 0 deletions
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plugins/loadcheck
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@ -15,6 +15,8 @@ If this is running on a system that provides /kern/loadavg or
Once a load value is determined, it is cached for a period of time.
See the cache_time below.
Since fork/exec is expensive in perl you'll want to use cache_time to avoid increasing your load on every connection by checking system load.
=head1 CONFIG
max_load
@ -38,6 +40,14 @@ loadcheck cache_time 30
loadcheck max_load 7 uptime /usr/bin/uptime
=head1 SEE ALSO
Original version: http://www.nntp.perl.org/group/perl.qpsmtpd/2006/01/msg4422.html
Variant with caching: http://www.nntp.perl.org/group/perl.qpsmtpd/2006/03/msg4710.html
Steve Kemp's announcement of an alternate load limiter: http://www.nntp.perl.org/group/perl.qpsmtpd/2008/03/msg7814.html
=head1 AUTHOR
Written by Peter Eisch <peter@boku.net>.