From 97977383f13fe74d73472ced1610624cdcd508a5 Mon Sep 17 00:00:00 2001
From: Guilherme Augusto da Rocha Silva <unknown@munin-monitoring.org>
Date: Fri, 30 Nov 2007 12:52:42 +0100
Subject: [PATCH] Initial version

---
 plugins/other/postgresql_database_ratio | 57 +++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100755 plugins/other/postgresql_database_ratio

diff --git a/plugins/other/postgresql_database_ratio b/plugins/other/postgresql_database_ratio
new file mode 100755
index 00000000..298e5f55
--- /dev/null
+++ b/plugins/other/postgresql_database_ratio
@@ -0,0 +1,57 @@
+#!/bin/bash
+#
+# Plugin to monitor PostgreSQL Database Ratios (blocks read X blocks hit)
+#
+# Author:
+#    Guilherme Augusto da Rocha Silva <gars.dba@gmail.com>
+#
+# Created:
+#    5th of november 2007
+#
+# Usage:
+#    Place in /etc/munin/plugins/ (or link it there using ln -s)
+#
+# Parameters:
+#    config   (required)
+#
+# General info:
+#    Require permission for database access and read (no writes are processed).
+#    Recomended user is PostgreSQL database owner (default: postgres).
+#
+# Log info:
+# 2007/11/30 - Review on comments
+#
+
+dbserver='localhost'
+dbuser='postgres'
+
+if [ "$1" = "config" ]; then
+   echo 'graph_args --base 1000 --lower-limit 0 --upper-limit 100'
+   echo 'graph_category Postgresql'
+   echo 'graph_info Shows each database read/hit (%) on the PostgreSQL Server.'
+   echo 'graph_scale no'
+   echo 'graph_title PostgreSQL Database Hit/Read Ratios'
+   echo 'graph_vlabel % of blocks read and hits'
+
+   psql -h ${dbserver} -U ${dbuser} -tc "SELECT datname FROM pg_stat_database WHERE datname != 'template0' ORDER BY 1;" | while read name
+   do
+      test -z "${name}" && continue
+      echo ${name}'.label '${name}
+      echo ${name}'.type GAUGE'
+      echo ${name}'.min 0'
+      echo ${name}'.max 100'
+      if [ "${name}" == "template0" ]; then
+         echo ${name}'.info PostgreSQL template database.'
+      elif [ "${name}" == "template1" ]; then
+         echo ${name}'.info PostgreSQL and/or user template database.'
+      elif [ "${name}" == "postgres" ]; then
+         echo ${name}'.info User postgres database.'
+      else
+         echo ${name}'.info User defined database.'
+         echo ${name}'.critical 50:min'
+         echo ${name}'.warning 75:min'
+      fi
+   done
+   exit 0
+fi
+psql -h ${dbserver} -U ${dbuser} -tc "SELECT '\n'||datname||'.value '||(CASE WHEN (blks_hit > 0) THEN ROUND((blks_hit::NUMERIC / (blks_hit + blks_read)::NUMERIC) * 100, 2) ELSE 0 END)::TEXT FROM pg_stat_database WHERE datname != 'template0' ORDER BY datname;"