Benchmark with pgbench

Run 60s load test with 32 clients across 8 threads, progress every 5s

pgbench -c 32 -j 8 -T 60 -P 5 -d <name>; -- init once: pgbench -i -s 100 <name>
tool
postgres29 commands
tags
postgresperformancemonitoring

More postgres commands

  • Connect to database
    psql -h localhost -U myuser -d mydb

    Interactive psql session to a database

  • List databases
    psql -U postgres -c '\l+'

    Show all databases with size and encoding

  • 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

all 29 postgres commands