2 # Plugin to monitor response time of search queries.
4 # Based on a plugin by Dalibo <cedric.villemain@dalibo.com> 2007
5 # Based on a plugin (postgres_block_read_) from Björn Ruberg <bjorn@linpro.no>
7 # Licenced under GPL v2.
11 # If required, give username, password and/or Postgresql server
12 # host through environment variables. See man page of psql for
21 #%# capabilities=autoconf
25 use vars qw ( $debug $configure );
26 use constant _PGMINI => 70400;
28 my $dbhost = $ENV{'PGHOST'} || '';
29 my $dbname = $ENV{'PGDATABASE'} || 'nominatim';
30 my $dbuser = $ENV{'PGUSER'} || 'postgres';
31 my $dbport = $ENV{'PGPORT'} || '5432';
33 my $dsn = "DBI:Pg:dbname=$dbname";
34 $dsn .=";host=$dbhost;port=$dbport" if $dbhost;
35 my $pg_server_version;
37 if (exists $ARGV[0]) {
38 if ($ARGV[0] eq 'autoconf') {
40 if (! eval "require DBD::Pg;") {
41 print "no (DBD::Pg not found)";
44 my $dbh = DBI->connect ($dsn,
49 $pg_server_version = $dbh->{'pg_server_version'};
50 if ($pg_server_version < (_PGMINI)) {
51 $pg_server_version =~ /(\d)(\d){2,2}(\d){2,2}/;
52 print "PostgreSQL Server version " . (_PGMINI) . " or above is needed. Current is $1.$2.$3 \n";
58 print "no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr;
61 } elsif ($ARGV[0] eq 'debug') {
64 } elsif ($ARGV[0] eq 'config') {
70 print "# $dsn\n" if $debug;
71 my $dbh = DBI->connect ($dsn,
76 die ("no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr."\n") unless($dbh);
77 $pg_server_version = $dbh->{'pg_server_version'};
80 print "graph_title Total Nominatim response time\n";
81 print "graph_vlabel Time to response\n";
82 print "graph_category Nominatim \n";
83 print "graph_period minute\n";
84 print "graph_args --base 1000\n";
86 print "avg.label Average time to response\n";
87 print "avg.draw LINE\n";
88 print "avg.type GAUGE\n";
90 print "avg.info Moving 5 minute average time to perform search\n";
91 print "avg.label Average time to response\n";
93 print "min.label Fastest time to response\n";
94 print "min.draw LINE\n";
95 print "min.type GAUGE\n";
97 print "min.info Fastest query in last 5 minutes\n";
99 print "max.label Slowest time to response\n";
100 print "max.draw LINE\n";
101 print "max.type GAUGE\n";
103 print "max.info Slowest query in last 5 minutes\n";
107 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 new_query_log where starttime > 'now'::timestamp - '5 minutes'::interval";
108 print "# $sql\n" if $debug;
109 my $sth = $dbh->prepare($sql);
111 printf ("# Rows: %d\n", $sth->rows) if $debug;
112 if ($sth->rows > 0) {
113 my ($avg, $min, $max) = $sth->fetchrow_array();
114 print "avg.value $avg\n";
115 print "min.value $min\n";
116 print "max.value $max\n";