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@camallen
camallen / pg_find_unused_indexes.sql
Created December 2, 2016 13:44
PostgreSQL - find unused indexes
SELECT
relid::regclass AS table,
indexrelid::regclass AS index,
pg_size_pretty(pg_relation_size(indexrelid::regclass)) AS index_size,
idx_tup_read,
idx_tup_fetch,
idx_scan
FROM
pg_stat_user_indexes
JOIN pg_index USING (indexrelid)
@camallen
camallen / pg_locks.sql
Last active February 8, 2020 04:37 — forked from parrish/pg_locks.sql
Show info on postgres locks
SELECT bl.pid AS blocked_pid,
a.usename AS blocked_user,
ka.query AS current_statement_in_blocking_process,
now() - ka.query_start AS blocking_duration,
kl.pid AS blocking_pid,
ka.usename AS blocking_user,
a.query AS blocked_statement,
now() - a.query_start AS blocked_duration
FROM pg_catalog.pg_locks bl
JOIN pg_catalog.pg_stat_activity a ON a.pid = bl.pid
@rgreenjr
rgreenjr / postgres_queries_and_commands.sql
Last active April 19, 2025 04:39
Useful PostgreSQL Queries and Commands
-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query
FROM pg_stat_activity
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
ORDER BY query_start desc;
-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query
FROM pg_stat_activity
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%'