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du-2: fix resource consumption when first running the plugin 

when installing / first running the plugin, it can take longer than
one munin-update call to create the $TIMEFILE. so until it is created
we assume the $LOCKFILE is not too old yet and let the first run finish
before we spawn additional processes.
This commit is contained in:
Andreas Perhab 2022-05-30 10:24:21 +02:00 committed by Lars Kruse
parent a620b1a507
commit 8dcc914938
1 changed files with 15 additions and 8 deletions
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23
plugins/disk/du-2
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@ -8,6 +8,7 @@
=head1 AUTHOR AND COPYRIGHT
Copyright 2011-2014 Luc Didry <luc AT didry.org>
Copyright 2022 Andreas Perhab, WT-IO-IT GmbH <a.perhab@wtioit.at>
=head1 HOWTO CONFIGURE AND USE :
@ -160,15 +161,21 @@ sub cache_is_too_old {
sub du_not_running {
if (-e $LOCKFILE) {
my ($time) = `cat $TIMEFILE`;
chomp $time;
if ( (time - $time) > ($ENV{interval}*60*60) ) {
# The cache is really old (60xinterval) => Maybe the lockfile wasn't properly deleted.
# Let's delete it.
system("rm $LOCKFILE;");
return 1;
if (-e $TIMEFILE) {
my ($time) = `cat $TIMEFILE`;
chomp $time;
if ( (time - $time) > ($ENV{interval}*60*60) ) {
# The cache is really old (60xinterval) => Maybe the lockfile wasn't properly deleted.
# Let's delete it.
unlink($LOCKFILE);
return 1;
} else {
return 0;
}
} else {
return 0;
# when $TIMEFILE is not yet created (first run is not yet finished), $LOCKFILE is honoured
# to prevent spawning multiple resource intensive processes
return 0;
}
} else {
return 1;