93 lines
2.7 KiB
Plaintext
93 lines
2.7 KiB
Plaintext
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#!/usr/bin/perl -w
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# Sun JVM tenured GC statistics. Parses a verbose log of tenured GC
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# stats. Reads the entire log file and sums time in seconds spent on
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# GC and number of times it is performed. Thus we obtain counters.
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# The counters are reset when the log is rotated. (note: the minorgcs
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# plugin uses a state file, we did not make it a priority to use a
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# state file in this plugin...)
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# The two numbers are graphed in _one_ graph. Where it has been used
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# until now these two numbers have been in the same order of
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# magnitude.
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# Configuration (common with the other sun_jvm_* plugins in this family):
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# [jvm_sun_*]
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# env.logfile /var/foo/java.log (default: /var/log/munin/java.log)
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# env.graphtitle (default: "Sun Java")
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# You need to configure your Sun JVM with these options:
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# -verbose:gc
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# -Xloggc:/var/log/app/jvm/gc.log
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# -XX:+PrintGCTimeStamps
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# -XX:+PrintGCDetails
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# History:
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# This plugin was developed by various people over some time - no logs
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# of this has been found. - In 2006 significant contributions was
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# financed by NRK (Norwegian Broadcasting Coproration) and performed
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# by Nicolai Langfeldt of Linpro AS in Oslo, Norway.
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# $Id: $
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use strict;
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use warnings;
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# Full path to jvm log file
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my $logfile = $ENV{logfile} || "/var/log/app/jvm/gc.log";
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my $grtitle = $ENV{graphtitle} || 'Sun Java';
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# Title that appears on munin graph
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my $title = "$grtitle tenured GCs pr second";
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# Extended information that appears below munin graph
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my $info = "Amount is the number of Tenured GC pr. second.\nSeconds spent is the total time spent on those Tenured GCs.";
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my $record = "";
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my %elements;
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# Print config information to munin server
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if ( $ARGV[0] and $ARGV[0] eq "config" ) {
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print "graph_title $grtitle tenured GCs pr minute\n";
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print "graph_period minute\n";
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print "graph_category Java\n";
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print "graph_args --lower-limit 0\n";
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print "graph_info $info\n";
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print "activity.label Number of GCs\n";
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print "activity.type DERIVE\n";
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print "activity.min 0\n";
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print "time.label Seconds spent on GCs\n";
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print "time.type DERIVE\n";
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print "time.min 0\n";
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exit 0;
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}
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# Scan through the log file and keep the last instance of a
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# Tenured record in $record.
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open( FILE, "< $logfile" ) or die "Can't open $logfile : $!";
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my $counter = 0;
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my $record_time_spent;
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my $time_spent;
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while (<FILE>) {
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chomp;
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if (m/.+Tenured.+/) {
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$record = $_;
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} elsif (m/^:.+/) {
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$record .= $_;
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}
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if ( $record =~ m/(\d+)\..+Tenured.+(\d+\.\d+) secs\]/ ) {
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# print "Record: $record\n";
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$record_time_spent = $2;
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# print "Time spent: ",$record_time_spent,"\n";
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$counter++;
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$time_spent += $record_time_spent;
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}
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$record = "";
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}
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close FILE;
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print "activity.value $counter\n";
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print "time.value ",int($time_spent),"\n";
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