--- /dev/null
+#!/usr/bin/perl -w
+# Plugin to monitor pg_stat_*_tables (user by default)
+#
+# Copyright Dalibo <cedric.villemain@dalibo.com> 2007
+# Based on a plugin (postgres_block_read_) from Björn Ruberg <bjorn@linpro.no>
+#
+# Licenced under GPL v2.
+#
+# Usage:
+#
+# Symlink into /etc/munin/plugins/ and add the monitored
+# database to the filename. e.g.:
+#
+# ln -s /usr/share/munin/plugins/pg__stat_tables \
+# /etc/munin/plugins/pg_<databasename>_stat_tables
+# This should, however, be given through autoconf and suggest.
+#
+# If required, give username, password and/or Postgresql server
+# host through environment variables.
+#
+# You must also activate Postgresql statistics. See
+# http://www.postgresql.org/docs/8.1/interactive/monitoring-stats.html
+# for how to enable this. Specifically, the following lines must
+# exist in your postgresql.conf:
+#
+# stats_start_collector = true
+# stats_block_level = true
+#
+#
+# Parameters:
+#
+# config (required)
+#
+# Config variables:
+#
+# dbhost - Which database server to use. Defaults to
+# 'localhost'.
+# dbname - Which database to use. Defaults to template1
+# dbuser - A Postgresql user account with read permission to
+# the given database. Defaults to
+# 'postgres'. Anyway, Munin must be told which user
+# this plugin should be run as.
+# dbpass - The corresponding password, if
+# applicable. Default to undef. Remember that
+# pg_hba.conf must be configured accordingly.
+#
+# Magic markers
+#%# family=auto
+#%# capabilities=autoconf
+
+use strict;
+use DBI;
+use vars qw ( $debug $configure );
+use constant _PGMINI => 70400;
+
+my $dbhost = $ENV{'dbhost'} || '';
+my $dbname = $ENV{'dbname'} || 'template1';
+my $dbuser = $ENV{'dbuser'} || 'postgres';
+my $dbport = $ENV{'dbport'} || '5432';
+my $dbpass = $ENV{'dbpass'} || '';
+my $statscope = $ENV{'statscope'} || 'user';
+
+my $dsn = "DBI:Pg:dbname=$dbname";
+$dsn .=";host=$dbhost;port=$dbport" if $dbhost;
+my $pg_server_version;
+
+if (exists $ARGV[0]) {
+ if ($ARGV[0] eq 'autoconf') {
+ # Check for DBD::Pg
+ if (! eval "require DBD::Pg;") {
+ print "no (DBD::Pg not found)";
+ exit 1;
+ }
+ my $dbh = DBI->connect ($dsn,
+ $dbuser,
+ $dbpass,
+ {RaiseError =>1});
+ if ($dbh) {
+ $pg_server_version = $dbh->{'pg_server_version'};
+ if ($pg_server_version < (_PGMINI)) {
+ $pg_server_version =~ /(\d)(\d){2,2}(\d){2,2}/;
+ print "PostgreSQL Server version " . (_PGMINI) . " or above is needed. Current is $1.$2.$3 \n";
+ exit 1;
+ }
+ print "yes\n";
+ exit 0;
+ } else {
+ print "no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr;
+ exit 1;
+ }
+ } elsif ($ARGV[0] eq 'debug') {
+ # Set debug flag
+ $debug = 1;
+ } elsif ($ARGV[0] eq 'config') {
+ # Set config flag
+ $configure = 1;
+ }
+}
+
+print "# $dsn\n" if $debug;
+my $dbh = DBI->connect ($dsn,
+ $dbuser,
+ $dbpass,
+ {RaiseError =>1});
+
+die ("no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr."\n") unless($dbh);
+$pg_server_version = $dbh->{'pg_server_version'};
+
+if ($configure) {
+ print "graph_title Total Nominatim response time\n";
+ print "graph_vlabel Time to response\n";
+ print "graph_category Nominatim \n";
+ print "graph_period minute\n";
+ print "graph_args --base 1000\n";
+
+ print "avg.label Average time to response\n";
+ print "avg.draw LINE\n";
+ print "avg.type GAUGE\n";
+ print "avg.min 0\n";
+ print "avg.info Moving 5 minute average time to perform search\n";
+ print "avg.label Average time to response\n";
+
+ print "min.label Fastest time to response\n";
+ print "min.draw LINE\n";
+ print "min.type GAUGE\n";
+ print "min.min 0\n";
+ print "min.info Fastest query in last 5 minutes\n";
+
+ print "max.label Slowest time to response\n";
+ print "max.draw LINE\n";
+ print "max.type GAUGE\n";
+ print "max.min 0\n";
+ print "max.info Slowest query in last 5 minutes\n";
+
+} else {
+
+ my $sql = "select TO_CHAR(avg(endtime-starttime),'SS.MS'),TO_CHAR(min(endtime-starttime),'SS.MS'),TO_CHAR(max(endtime-starttime),'SS.MS') from query_log where starttime > 'now'::timestamp - '5 minutes'::interval";
+ print "# $sql\n" if $debug;
+ my $sth = $dbh->prepare($sql);
+ $sth->execute();
+ printf ("# Rows: %d\n", $sth->rows) if $debug;
+ if ($sth->rows > 0) {
+ my ($avg, $min, $max) = $sth->fetchrow_array();
+ print "avg.value $avg\n";
+ print "min.value $min\n";
+ print "max.value $max\n";
+ }
+}
+
+exit 0;
+