Added new bash script for killing idle 9.1 transactions. Replaces earlier code.

Author: jberkus

administration/kill_idle_xact_91.sh

@@ -0,0 +1,67 @@
+#!/bin/bash
+
+# please configure by setting the folloiwng shell variables
+
+# REQUIRED: set location of log file for logging killed transactions
+LOGFILE=/var/log/postgresql/kill_idle.log
+
+# REQUIRED: set timelimit for oldest idle transaction, in minutes
+IDLETIME=15
+
+# REQUIRED: set timelimit for oldest non-idle long-running transaction
+# in minutes.  Set to 1000 if you don't really want these cancelled
+XACTTIME=120
+
+# REQUIRED: set users to be ignored and not kill idle transactions
+# generally you want to omit the postgres superuser and the user
+# pg_dump runs as from being killed
+# if you have no users like this, just set both to XXXXX
+SUPERUSER=postgres
+BACKUPUSER=XXXXX
+
+# REQUIRED: path to psql, since cron often lacks search paths
+PSQL=/usr/lib/postgresql/9.1/bin/psql
+
+# OPTIONAL: set these connection variables.  if you are running as the
+# postgres user on the local machine with passwordless login, you will 
+# not needto set any of these
+PGHOST=
+PGUSER=
+PGPORT=
+PGPASSWORD=
+
+# you should not need to change code below this line
+####################################################
+
+export PGHOST
+export PGUSER
+export PGPORT
+export PGPASSWORD
+exec >> $LOGFILE 2>&1
+SAFELIST="ARRAY['${SUPERUSER}', '${BACKUPUSER}']"
+IDLEPARAM="'${IDLETIME} minutes'"
+XACTPARAM="'${XACTTIME} minutes'"
+
+KILLQUERY="WITH idles AS (
+    SELECT datname, procpid, usename, application_name,
+        client_addr, backend_start, xact_start, query_start,
+        waiting, pg_terminate_backend(procpid)
+    FROM pg_stat_activity
+    WHERE current_query = '<IDLE> in transaction'
+        AND usename != '${SUPERUSER}'
+        AND usename != '${BACKUPUSER}'
+        AND ( ( now() - xact_start ) > '${XACTTIME} minutes'
+            OR ( now() - query_start ) > '${IDLETIME} minutes' )
+)
+SELECT array_to_string(ARRAY[ now()::TEXT,
+                idles.datname::TEXT, idles.procpid::TEXT, idles.usename::TEXT,
+                idles.application_name, idles.client_addr::TEXT,
+                idles.backend_start::TEXT, idles.xact_start::TEXT,
+                idles.waiting::TEXT], '|')
+FROM idles
+ORDER BY xact_start;"
+
+psql -q -t -c "${KILLQUERY}"
+
+exit 0
+