486 lines
21 KiB
Bash
Executable File
486 lines
21 KiB
Bash
Executable File
#!/bin/bash
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# +------------------------------------------------------------------+
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# | ____ _ _ __ __ _ __ |
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# | / ___| |__ ___ ___| | __ | \/ | |/ / |
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# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
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# | | |___| | | | __/ (__| < | | | | . \ |
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# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
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# | |
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# | Copyright Mathias Kettner 2015 mk@mathias-kettner.de |
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# +------------------------------------------------------------------+
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#
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# This file is part of Check_MK.
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# The official homepage is at http://mathias-kettner.de/check_mk.
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#
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# check_mk is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation in version 2. check_mk is distributed
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# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
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# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE. See the GNU General Public License for more de-
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# tails. You should have received a copy of the GNU General Public
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# License along with GNU Make; see the file COPYING. If not, write
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# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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# Boston, MA 02110-1301 USA.
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# TODO postgres_connections output format
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# .--common funcs--------------------------------------------------------.
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# | __ |
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# | ___ ___ _ __ ___ _ __ ___ ___ _ __ / _|_ _ _ __ ___ ___ |
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# | / __/ _ \| '_ ` _ \| '_ ` _ \ / _ \| '_ \ | |_| | | | '_ \ / __/ __| |
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# || (_| (_) | | | | | | | | | | | (_) | | | || _| |_| | | | | (__\__ \ |
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# | \___\___/|_| |_| |_|_| |_| |_|\___/|_| |_||_| \__,_|_| |_|\___|___/ |
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# | |
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# '----------------------------------------------------------------------'
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function compare_version_greater_equal() {
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local GREATER_ONE
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GREATER_ONE=$(echo "$1 $2" | awk '{if ($1 >= $2) print $1; else print $2}')
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if [ "$GREATER_ONE" == "$1" ] ; then
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return 0
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else
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return 1
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fi
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}
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#.
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# .--section funcs-------------------------------------------------------.
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# | _ _ __ |
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# | ___ ___ ___| |_(_) ___ _ __ / _|_ _ _ __ ___ ___ |
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# | / __|/ _ \/ __| __| |/ _ \| '_ \ | |_| | | | '_ \ / __/ __| |
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# | \__ \ __/ (__| |_| | (_) | | | | | _| |_| | | | | (__\__ \ |
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# | |___/\___|\___|\__|_|\___/|_| |_| |_| \__,_|_| |_|\___|___/ |
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# | |
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# '----------------------------------------------------------------------'
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function postgres_instances() {
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echo '<<<postgres_instances>>>'
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# If we have no instances we take db id (pqsql/postgres) because
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# ps output may be unreadable
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# In case of instances ps output shows them readable
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if [ ! -z "${1}" ]; then
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echo "[[[${1}]]]"
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fi
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pgrep -laf bin/postgres
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}
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function postgres_sessions() {
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# Postgres 9.2 uses 'query' instead of 'current_query'
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local OUTPUT
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OUTPUT="$(echo "\echo '<<<postgres_sessions>>>${INSTANCE_SECTION}'
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SELECT (
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SELECT column_name
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FROM information_schema.columns
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WHERE table_name='pg_stat_activity' AND column_name in ('query', 'current_query')
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) = '<IDLE>' as query, count(*)
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FROM pg_stat_activity
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GROUP BY (query = '<IDLE>');" |\
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su - "$DBUSER" -c "$export_PGPASSFILE $psql -X --variable ON_ERROR_STOP=1 -d $PGDATABASE ${EXTRA_ARGS} -A -t -F' '" 2>/dev/null)"
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echo "$OUTPUT"
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# line with number of idle sessions is sometimes missing on Postgres 8.x. This can lead
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# to an altogether empty section and thus the check disappearing.
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echo "$OUTPUT" | grep -q '^t ' || echo "t 0"
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}
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function postgres_simple_queries() {
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# Querytime
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# Supports versions >= 8.3, > 9.1
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local QUERYTIME_QUERY
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if compare_version_greater_equal "$POSTGRES_VERSION" "9.2" ; then
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QUERYTIME_QUERY="SELECT datname, datid, usename, client_addr, state AS state, COALESCE(ROUND(EXTRACT(epoch FROM now()-query_start)),0) AS seconds,
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pid, regexp_replace(query, E'[\\n\\r\\u2028]+', ' ', 'g' ) AS current_query FROM pg_stat_activity WHERE (query_start IS NOT NULL AND (state NOT LIKE 'idle%' OR state IS NULL)) ORDER BY query_start, pid DESC;"
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else
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QUERYTIME_QUERY="SELECT datname, datid, usename, client_addr, '' AS state, COALESCE(ROUND(EXTRACT(epoch FROM now()-query_start)),0) AS seconds,
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procpid as pid, regexp_replace(current_query, E'[\\n\\r\\u2028]+', ' ', 'g' ) AS current_query FROM pg_stat_activity WHERE (query_start IS NOT NULL AND current_query NOT LIKE '<IDLE>%') ORDER BY query_start, procpid DESC;"
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fi
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# Number of current connections per database
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# We need to output the databases, too.
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# This query does not report databases without an active query
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local CONNECTIONS_QUERY
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if compare_version_greater_equal "$POSTGRES_VERSION" "9.2" ; then
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CONNECTIONS_QUERY="SELECT COUNT(datid) AS current,
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(SELECT setting AS mc FROM pg_settings WHERE name = 'max_connections') AS mc,
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d.datname
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FROM pg_database d
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LEFT JOIN pg_stat_activity s ON (s.datid = d.oid) WHERE state <> 'idle'
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GROUP BY 2,3
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ORDER BY datname;"
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else
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CONNECTIONS_QUERY="SELECT COUNT(datid) AS current,
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(SELECT setting AS mc FROM pg_settings WHERE name = 'max_connections') AS mc,
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d.datname
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FROM pg_database d
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LEFT JOIN pg_stat_activity s ON (s.datid = d.oid) WHERE current_query <> '<IDLE>'
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GROUP BY 2,3
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ORDER BY datname;"
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fi
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echo "\pset footer off
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\echo '<<<postgres_stat_database:sep(59)>>>${INSTANCE_SECTION}'
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SELECT datid, datname, numbackends, xact_commit, xact_rollback, blks_read, blks_hit, tup_returned, tup_fetched, tup_inserted, tup_updated, tup_deleted, pg_database_size(datname) AS datsize FROM pg_stat_database;
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\echo '<<<postgres_locks:sep(59)>>>${INSTANCE_SECTION}'
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\echo '[databases_start]'
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$ECHO_DATABASES
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\echo '[databases_end]'
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SELECT datname, granted, mode FROM pg_locks l RIGHT JOIN pg_database d ON (d.oid=l.database) WHERE d.datallowconn;
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\echo '<<<postgres_query_duration:sep(59)>>>${INSTANCE_SECTION}'
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\echo '[databases_start]'
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$ECHO_DATABASES
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\echo '[databases_end]'
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$QUERYTIME_QUERY
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\echo '<<<postgres_connections:sep(59)>>>${INSTANCE_SECTION}'
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\echo '[databases_start]'
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$ECHO_DATABASES
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\echo '[databases_end]'
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$CONNECTIONS_QUERY" \
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| su - "$DBUSER" -c "$export_PGPASSFILE $psql -X -d $PGDATABASE ${EXTRA_ARGS} -q -A -F';'"
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}
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function postgres_stats() {
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# Contains last vacuum time and analyze time
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local LASTVACUUM="SELECT current_database() AS datname, nspname AS sname, relname AS tname,
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CASE WHEN v IS NULL THEN -1 ELSE round(extract(epoch FROM v)) END AS vtime,
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CASE WHEN g IS NULL THEN -1 ELSE round(extract(epoch FROM v)) END AS atime
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FROM (SELECT nspname, relname, GREATEST(pg_stat_get_last_vacuum_time(c.oid), pg_stat_get_last_autovacuum_time(c.oid)) AS v,
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GREATEST(pg_stat_get_last_analyze_time(c.oid), pg_stat_get_last_autoanalyze_time(c.oid)) AS g
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FROM pg_class c, pg_namespace n
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WHERE relkind = 'r' AND n.oid = c.relnamespace AND n.nspname <> 'information_schema'
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ORDER BY 3) AS foo;"
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local FIRST=
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local QUERY="\pset footer off
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BEGIN;
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SET statement_timeout=30000;
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COMMIT;
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\echo '<<<postgres_stats:sep(59)>>>${INSTANCE_SECTION}'
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\echo '[databases_start]'
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$ECHO_DATABASES
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\echo '[databases_end]'"
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for db in $DATABASES ; do
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QUERY="$QUERY
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\c $db
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$LASTVACUUM
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"
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if [ -z $FIRST ] ; then
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FIRST=false
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QUERY="$QUERY
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\pset tuples_only on
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"
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fi
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done
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echo "$QUERY" | su - "$DBUSER" -c "$export_PGPASSFILE $psql -X ${EXTRA_ARGS} -q -A -F';'" | grep -v -e 'COMMIT$' -e 'SET$' -e 'BEGIN$'
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}
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function postgres_version() {
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# Postgres version an connection time
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echo -e "<<<postgres_version:sep(1)>>>${INSTANCE_SECTION}"
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(TIMEFORMAT='%3R'; time echo "SELECT version() AS v" |\
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su - "$DBUSER" -c "$export_PGPASSFILE $psql -X -d $PGDATABASE ${EXTRA_ARGS} -t -A -F';'; echo -e '<<<postgres_conn_time>>>${INSTANCE_SECTION}'") 2>&1
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}
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function postgres_bloat() {
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# Bloat index and tables
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# Supports versions <9.0, >=9.0
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# This huge query has been gratefully taken from Greg Sabino Mullane's check_postgres.pl
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local BLOAT_QUERY
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if compare_version_greater_equal "$POSTGRES_VERSION" "9.0" ; then
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BLOAT_QUERY="SELECT
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current_database() AS db, schemaname, tablename, reltuples::bigint AS tups, relpages::bigint AS pages, otta,
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ROUND(CASE WHEN otta=0 OR sml.relpages=0 OR sml.relpages=otta THEN 0.0 ELSE sml.relpages/otta::numeric END,1) AS tbloat,
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CASE WHEN relpages < otta THEN 0 ELSE relpages::bigint - otta END AS wastedpages,
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CASE WHEN relpages < otta THEN 0 ELSE bs*(sml.relpages-otta)::bigint END AS wastedbytes,
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CASE WHEN relpages < otta THEN 0 ELSE (bs*(relpages-otta))::bigint END AS wastedsize,
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iname, ituples::bigint AS itups, ipages::bigint AS ipages, iotta,
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ROUND(CASE WHEN iotta=0 OR ipages=0 OR ipages=iotta THEN 0.0 ELSE ipages/iotta::numeric END,1) AS ibloat,
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CASE WHEN ipages < iotta THEN 0 ELSE ipages::bigint - iotta END AS wastedipages,
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CASE WHEN ipages < iotta THEN 0 ELSE bs*(ipages-iotta) END AS wastedibytes,
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CASE WHEN ipages < iotta THEN 0 ELSE (bs*(ipages-iotta))::bigint END AS wastedisize,
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CASE WHEN relpages < otta THEN
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CASE WHEN ipages < iotta THEN 0 ELSE bs*(ipages-iotta::bigint) END
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ELSE CASE WHEN ipages < iotta THEN bs*(relpages-otta::bigint)
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ELSE bs*(relpages-otta::bigint + ipages-iotta::bigint) END
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END AS totalwastedbytes
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FROM (
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SELECT
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nn.nspname AS schemaname,
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cc.relname AS tablename,
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COALESCE(cc.reltuples,0) AS reltuples,
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COALESCE(cc.relpages,0) AS relpages,
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COALESCE(bs,0) AS bs,
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COALESCE(CEIL((cc.reltuples*((datahdr+ma-
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(CASE WHEN datahdr%ma=0 THEN ma ELSE datahdr%ma END))+nullhdr2+4))/(bs-20::float)),0) AS otta,
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COALESCE(c2.relname,'?') AS iname, COALESCE(c2.reltuples,0) AS ituples, COALESCE(c2.relpages,0) AS ipages,
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COALESCE(CEIL((c2.reltuples*(datahdr-12))/(bs-20::float)),0) AS iotta -- very rough approximation, assumes all cols
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FROM
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pg_class cc
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JOIN pg_namespace nn ON cc.relnamespace = nn.oid AND nn.nspname <> 'information_schema'
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LEFT JOIN
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(
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SELECT
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ma,bs,foo.nspname,foo.relname,
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(datawidth+(hdr+ma-(case when hdr%ma=0 THEN ma ELSE hdr%ma END)))::numeric AS datahdr,
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(maxfracsum*(nullhdr+ma-(case when nullhdr%ma=0 THEN ma ELSE nullhdr%ma END))) AS nullhdr2
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FROM (
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SELECT
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ns.nspname, tbl.relname, hdr, ma, bs,
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SUM((1-coalesce(null_frac,0))*coalesce(avg_width, 2048)) AS datawidth,
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MAX(coalesce(null_frac,0)) AS maxfracsum,
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hdr+(
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SELECT 1+count(*)/8
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FROM pg_stats s2
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WHERE null_frac<>0 AND s2.schemaname = ns.nspname AND s2.tablename = tbl.relname
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) AS nullhdr
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FROM pg_attribute att
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JOIN pg_class tbl ON att.attrelid = tbl.oid
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JOIN pg_namespace ns ON ns.oid = tbl.relnamespace
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LEFT JOIN pg_stats s ON s.schemaname=ns.nspname
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AND s.tablename = tbl.relname
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AND s.inherited=false
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AND s.attname=att.attname,
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(
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SELECT
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(SELECT current_setting('block_size')::numeric) AS bs,
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CASE WHEN SUBSTRING(SPLIT_PART(v, ' ', 2) FROM '#\[0-9]+.[0-9]+#\%' for '#')
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IN ('8.0','8.1','8.2') THEN 27 ELSE 23 END AS hdr,
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CASE WHEN v ~ 'mingw32' OR v ~ '64-bit' THEN 8 ELSE 4 END AS ma
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FROM (SELECT version() AS v) AS foo
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) AS constants
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WHERE att.attnum > 0 AND tbl.relkind='r'
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GROUP BY 1,2,3,4,5
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) AS foo
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) AS rs
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ON cc.relname = rs.relname AND nn.nspname = rs.nspname
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LEFT JOIN pg_index i ON indrelid = cc.oid
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LEFT JOIN pg_class c2 ON c2.oid = i.indexrelid
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) AS sml
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WHERE sml.relpages - otta > 0 OR ipages - iotta > 10 ORDER BY totalwastedbytes DESC LIMIT 10;"
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else
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BLOAT_QUERY="SELECT
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current_database() AS db, schemaname, tablename, reltuples::bigint AS tups, relpages::bigint AS pages, otta,
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ROUND(CASE WHEN otta=0 OR sml.relpages=0 OR sml.relpages=otta THEN 0.0 ELSE sml.relpages/otta::numeric END,1) AS tbloat,
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CASE WHEN relpages < otta THEN 0 ELSE relpages::bigint - otta END AS wastedpages,
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CASE WHEN relpages < otta THEN 0 ELSE bs*(sml.relpages-otta)::bigint END AS wastedbytes,
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CASE WHEN relpages < otta THEN '0 bytes'::text ELSE (bs*(relpages-otta))::bigint || ' bytes' END AS wastedsize,
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iname, ituples::bigint AS itups, ipages::bigint AS ipages, iotta,
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ROUND(CASE WHEN iotta=0 OR ipages=0 OR ipages=iotta THEN 0.0 ELSE ipages/iotta::numeric END,1) AS ibloat,
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CASE WHEN ipages < iotta THEN 0 ELSE ipages::bigint - iotta END AS wastedipages,
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CASE WHEN ipages < iotta THEN 0 ELSE bs*(ipages-iotta) END AS wastedibytes,
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CASE WHEN ipages < iotta THEN '0 bytes' ELSE (bs*(ipages-iotta))::bigint || ' bytes' END AS wastedisize,
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CASE WHEN relpages < otta THEN
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CASE WHEN ipages < iotta THEN 0 ELSE bs*(ipages-iotta::bigint) END
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ELSE CASE WHEN ipages < iotta THEN bs*(relpages-otta::bigint)
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ELSE bs*(relpages-otta::bigint + ipages-iotta::bigint) END
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END AS totalwastedbytes
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FROM (
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SELECT
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nn.nspname AS schemaname,
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cc.relname AS tablename,
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COALESCE(cc.reltuples,0) AS reltuples,
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COALESCE(cc.relpages,0) AS relpages,
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COALESCE(bs,0) AS bs,
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COALESCE(CEIL((cc.reltuples*((datahdr+ma-
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(CASE WHEN datahdr%ma=0 THEN ma ELSE datahdr%ma END))+nullhdr2+4))/(bs-20::float)),0) AS otta,
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COALESCE(c2.relname,'?') AS iname, COALESCE(c2.reltuples,0) AS ituples, COALESCE(c2.relpages,0) AS ipages,
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COALESCE(CEIL((c2.reltuples*(datahdr-12))/(bs-20::float)),0) AS iotta -- very rough approximation, assumes all cols
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FROM
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pg_class cc
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JOIN pg_namespace nn ON cc.relnamespace = nn.oid AND nn.nspname <> 'information_schema'
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LEFT JOIN
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(
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SELECT
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ma,bs,foo.nspname,foo.relname,
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(datawidth+(hdr+ma-(case when hdr%ma=0 THEN ma ELSE hdr%ma END)))::numeric AS datahdr,
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(maxfracsum*(nullhdr+ma-(case when nullhdr%ma=0 THEN ma ELSE nullhdr%ma END))) AS nullhdr2
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FROM (
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SELECT
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ns.nspname, tbl.relname, hdr, ma, bs,
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SUM((1-coalesce(null_frac,0))*coalesce(avg_width, 2048)) AS datawidth,
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MAX(coalesce(null_frac,0)) AS maxfracsum,
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hdr+(
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SELECT 1+count(*)/8
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FROM pg_stats s2
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WHERE null_frac<>0 AND s2.schemaname = ns.nspname AND s2.tablename = tbl.relname
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) AS nullhdr
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FROM pg_attribute att
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JOIN pg_class tbl ON att.attrelid = tbl.oid
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JOIN pg_namespace ns ON ns.oid = tbl.relnamespace
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LEFT JOIN pg_stats s ON s.schemaname=ns.nspname
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AND s.tablename = tbl.relname
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AND s.attname=att.attname,
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(
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SELECT
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(SELECT current_setting('block_size')::numeric) AS bs,
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CASE WHEN SUBSTRING(SPLIT_PART(v, ' ', 2) FROM '#\"[0-9]+.[0-9]+#\"%' for '#')
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IN ('8.0','8.1','8.2') THEN 27 ELSE 23 END AS hdr,
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CASE WHEN v ~ 'mingw32' OR v ~ '64-bit' THEN 8 ELSE 4 END AS ma
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FROM (SELECT version() AS v) AS foo
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) AS constants
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WHERE att.attnum > 0 AND tbl.relkind='r'
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GROUP BY 1,2,3,4,5
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) AS foo
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) AS rs
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ON cc.relname = rs.relname AND nn.nspname = rs.nspname
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LEFT JOIN pg_index i ON indrelid = cc.oid
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LEFT JOIN pg_class c2 ON c2.oid = i.indexrelid
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) AS sml
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WHERE sml.relpages - otta > 0 OR ipages - iotta > 10 ORDER BY totalwastedbytes DESC LIMIT 10;"
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fi
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local FIRST=
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local QUERY="\pset footer off
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\echo '<<<postgres_bloat:sep(59)>>>${INSTANCE_SECTION}'
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\echo '[databases_start]'
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$ECHO_DATABASES
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\echo '[databases_end]'"
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for db in $DATABASES ; do
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QUERY="$QUERY
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\c $db
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$BLOAT_QUERY
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"
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if [ -z $FIRST ] ; then
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FIRST=false
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QUERY="$QUERY
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\pset tuples_only on
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"
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fi
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done
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echo "$QUERY" | su - "$DBUSER" -c "$export_PGPASSFILE $psql -X ${EXTRA_ARGS} -q -A -F';'"
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}
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#.
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# .--main----------------------------------------------------------------.
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# | _ |
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# | _ __ ___ __ _(_)_ __ |
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# | | '_ ` _ \ / _` | | '_ \ |
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# | | | | | | | (_| | | | | | |
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# | |_| |_| |_|\__,_|_|_| |_| |
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# | |
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# '----------------------------------------------------------------------'
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### postgres.cfg ##
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# DBUSER=OS_USER_NAME
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# INSTANCE=/home/postgres/db1.env:USER_NAME:/PATH/TO/.pgpass
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# INSTANCE=/home/postgres/db2.env:USER_NAME:/PATH/TO/.pgpass
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# TODO @dba USERNAME in .pgpass ?
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# INSTANCE=/home/postgres/db2.env:/PATH/TO/.pgpass
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function postgres_main() {
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if [ -z "$DBUSER" ] || [ -z "$PGDATABASE" ] ; then
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exit 0
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fi
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EXTRA_ARGS=""
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if [ ! -z "$PGUSER" ]; then
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EXTRA_ARGS=$EXTRA_ARGS" -U $PGUSER"
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fi
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if [ ! -z "$PGPORT" ]; then
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EXTRA_ARGS=$EXTRA_ARGS" -p $PGPORT"
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fi
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if [ ! -z "$PGPASSFILE" ]; then
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export_PGPASSFILE="export PGPASSFILE=$PGPASSFILE; "
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fi
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DATABASES="$(echo "SELECT datname FROM pg_database WHERE datistemplate = false;" |\
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su - "$DBUSER" -c "$export_PGPASSFILE $psql -X -d $PGDATABASE ${EXTRA_ARGS} -t -A -F';'")"
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ECHO_DATABASES="$(echo "$DATABASES" | sed 's/^/\\echo /')"
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POSTGRES_VERSION=$(su - "$DBUSER" -c "$psql -X -V -d $PGDATABASE ${EXTRA_ARGS} | egrep -o '[0-9]{1,}\.[0-9]{1,}'")
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postgres_sessions
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postgres_simple_queries
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postgres_stats
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postgres_version
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postgres_bloat
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}
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MK_CONFFILE=$MK_CONFDIR/postgres.cfg
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if [ -e "$MK_CONFFILE" ]; then
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postgres_instances
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DBUSER=$(grep DBUSER "$MK_CONFFILE" | sed 's/.*=//g')
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cat "$MK_CONFFILE" | while read line
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do
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case $line in
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INSTANCE*)
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instance=$line
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;;
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*)
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instance=
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;;
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esac
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if [ ! -z "$instance" ]; then
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instance_path=$(echo "$instance" | sed 's/.*=\(.*\):.*:.*$/\1/g')
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instance_name=$(echo "$instance_path" | sed -e 's/.*\/\(.*\)/\1/g' -e 's/\.env$//g')
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if [ ! -z "$instance_name" ]; then
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INSTANCE_SECTION="\n[[[$instance_name]]]"
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else
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INSTANCE_SECTION=""
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fi
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psql="/$DBUSER/$(grep "^export PGVERSION=" "$instance_path" |
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sed -e 's/.*=//g' -e 's/\s*#.*$//g')/bin/psql"
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PGUSER=$(echo "$instance" | sed 's/.*=.*:\(.*\):.*$/\1/g')
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PGPASSFILE="$(echo "$instance" | sed 's/.*=.*:.*:\(.*\)$/\1/g')"
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PGDATABASE=$(grep "^export PGDATABASE=" "$instance_path" |
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sed -e 's/.*=//g' -e 's/\s*#.*$//g')
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PGPORT=$(grep "^export PGPORT=" "$instance_path" |
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sed -e 's/.*=//g' -e 's/\s*#.*$//g')
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# Fallback
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if [ ! -f "$psql" ]; then
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psql="$(cat $instance_path | grep "^export PGHOME=" |
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sed -e 's/.*=//g' -e 's/\s*#.*$//g')/psql"
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fi
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postgres_main
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fi
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done
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else
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if id pgsql >/dev/null 2>&1; then
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DBUSER=pgsql
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elif id postgres >/dev/null 2>&1; then
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DBUSER=postgres
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else
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exit 0
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fi
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INSTANCE_SECTION=""
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postgres_instances "$DBUSER"
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psql="psql"
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PGDATABASE=postgres
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postgres_main
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fi
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