52 lines
1.6 KiB
Bash
Executable File
52 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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#
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# Plugin to monitor PostgreSQL Backends
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#
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# Author:
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# Guilherme Augusto da Rocha Silva <gars.dba@gmail.com>
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#
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# Created:
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# 5th of november 2007
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#
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# Usage:
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# Place in /etc/munin/plugins/ (or link it there using ln -s)
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#
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# Parameters:
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# config (required)
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#
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# General info:
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# Require permission for database access and read (no writes are processed).
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# Recommended user is PostgreSQL database owner (default: postgres).
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#
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# Log info:
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# 2007/11/30 - Review on comments
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# 2012/12/19 - Updated to connect locally instead of localhost by default
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# (PostgreSQL has different permissions for these).
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#
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dbserver='' #'-h hostname'
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dbuser='postgres'
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if [ "$1" = "config" ]; then
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maximum=$(psql ${dbserver} -U ${dbuser} -tc "SHOW max_connections;" | bc)
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reserved=$(psql ${dbserver} -U ${dbuser} -tc "SHOW superuser_reserved_connections;" | bc)
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warning=$(((maximum-reserved)*70/100))
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critical=$(((maximum-reserved)*90/100))
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echo 'graph_args --base 1000 --lower-limit 0 --upper-limit '${maximum}
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echo 'graph_category db'
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echo 'graph_info Shows open backends on the PostgreSQL Server.'
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echo 'graph_scale no'
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echo 'graph_title PostgreSQL Active Backends'
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echo 'graph_vlabel Number of active backends'
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echo 'backends.label backends'
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echo 'backends.type GAUGE'
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echo 'backends.min 0'
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echo 'backends.max '${maximum}
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echo 'backends.warning '${warning}
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echo 'backends.critical '${critical}
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echo 'backends.info Number of open sessions.'
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exit 0
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fi
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echo 'backends.value '$(psql ${dbserver} -U ${dbuser} -tc "SELECT SUM(numbackends) FROM pg_stat_database;" | bc)
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