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Joan Carles Soler 2007-03-07 10:21:34 +01:00 committed by Steve Schnepp
parent 55d100de1b
commit 5f607d2780
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plugins/other/oracle__database_hitratio Executable file
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#!/usr/bin/perl -w
# Plugin for monitor oracle database reads.
#
# 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/oracle__database__hitratio \
# /etc/munin/plugins/oracle_<databasename>_database__hitratio
# This should, however, be given through autoconf and suggest.
#
# If required, give username, password and/or Oracle server
# host through environment variables.
#
#
# Parameters:
#
# config (required)
#
# Config variables:
#
# dbhost - Which database server to use. Defaults to
# 'localhost'.
# dbname - Which database to use. Defaults to orl1
# dbuser - A Oracle user account with read permission to
# the given database. Defaults to
# 'oracle'. Anyway, Munin must be told which user
# this plugin should be run as.
# dbpass - The corresponding password, if
# applicable. Default to undef.
#
# Magic markers
#%# family=auto
#%# capabilities=autoconf
use strict;
use DBI;
my $dbhost = $ENV{'dbhost'} || '127.0.0.1';
my $dbname = $ENV{'dbname'} || 'orl1';
my $dbuser = $ENV{'dbuser'} || 'oracle';
my $dbport = $ENV{'dbport'} || '1521';
my $dbpass = $ENV{'dbpass'} || '';
# Check for DBD::Oracle
if (! eval "require DBD::Oracle;") {
exit 1;
}
my $dsn = "DBI:Oracle:dbname=$dbname;host=$dbhost;port=$dbport;sid=$dbname";
#print "$dsn\n";
my $dbh = DBI->connect ($dsn, $dbuser,
$dbpass,
{RaiseError =>1}) || die "";
if (exists $ARGV[0]) {
if ($ARGV[0] eq 'autoconf') {
# Check for DBD::Oracle
if (! eval "require DBD::Oracle;") {
print "no (DBD::Oracle not found)";
exit 1;
}
if ($dbh) {
print "yes\n";
exit 0;
} else {
print "no Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr;
exit 1;
}
}
if ($ARGV[0] eq "config") {
print "graph_title Oracle library and buffer cache hit ratios from $dbname\n";
print "graph_args --upper-limit 110 -l 0\n";
print "graph_vlabel %\n";
print "graph_category Oracle\n";
print "graph_info This graph shows the percentage of blocks and libraries read from the cache\n";
print "read_hitratio.label Cache hitratio\n";
print "read_hitratio.type GAUGE\n";
print "read_hitratio.draw LINE2\n";
print "lib_hitratio.label Library hitratio\n";
print "lib_hitratio.type GAUGE\n";
print "lib_hitratio.draw LINE2\n";
exit 0;
}
}
#cache hitratio
my $sql_curr = "select (1-(pr.value/(dbg.value+cg.value)))*100 \
from v\$sysstat pr, v\$sysstat dbg, v\$sysstat cg \
where pr.name='physical reads' and dbg.name='db block gets' and cg.name='consistent gets'";
my $sth_curr = $dbh->prepare($sql_curr);
$sth_curr->execute();
my ($read_hitratio) = $sth_curr->fetchrow();
print "read_hitratio.value $read_hitratio\n";
#libray hit ratio
$sql_curr = "select sum(lc.pins)/(sum(lc.pins)+sum(lc.reloads))*100 \
from v\$librarycache lc";
$sth_curr = $dbh->prepare($sql_curr);
$sth_curr->execute();
my ($lib_hitratio) = $sth_curr->fetchrow();
print "lib_hitratio.value $lib_hitratio\n";