List databases

Show all databases with size and encoding

psql -U postgres -c '\l+'
tool
postgres29 commands
tags
postgres

More postgres commands

  • List tables in schema
    psql -U myuser -d mydb -c '\dt public.*'

    List all tables in the public schema

  • EXPLAIN ANALYZE a query
    psql -U myuser -d mydb -c 'EXPLAIN (ANALYZE, BUFFERS, FORMAT TEXT) SELECT * FROM orders WHERE status = $1;'

    Show query plan with actual timings and buffer usage

  • Show slow queries (pg_stat_statements)
    psql -U postgres -d mydb -c "SELECT round(total_exec_time::numeric,2) ms, calls, round((total_exec_time/calls)::numeric,2) avg_ms, query FROM pg_stat_statements ORDER BY total_exec_time DESC LIMIT 10;"

    Top 10 slowest queries by total execution time

  • Show active queries
    psql -U postgres -c "SELECT pid, now()-query_start AS duration, state, left(query,80) FROM pg_stat_activity WHERE state <> 'idle' ORDER BY duration DESC;"

    Running queries with duration and truncated SQL

  • Kill long-running query
    psql -U postgres -c "SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE now()-query_start > interval '5 min' AND state = 'active';"

    Terminate all queries running longer than 5 minutes

all 29 postgres commands