diff --git a/plugins/other/oracle__database_hitratio b/plugins/other/oracle__database_hitratio
new file mode 100755
index 00000000..15d696ef
--- /dev/null
+++ b/plugins/other/oracle__database_hitratio
@@ -0,0 +1,111 @@
+#!/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";
+