Активные запросы postgres
Выполняющиеся запросы с длительностью и SQL
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;"
more postgres
all 29 commands →
Убить долгий запрос
psql -U postgres -c "SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE now()-query_start > interval '5 min' AND state = 'active';"
Размеры таблиц
psql -U myuser -d mydb -c "SELECT schemaname, tablename, pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) size FROM pg_tables ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC LIMIT 20;"
Использование индексов
psql -U myuser -d mydb -c "SELECT relname, indexrelname, idx_scan, idx_tup_read FROM pg_stat_user_indexes ORDER BY idx_scan DESC LIMIT 20;"
Неиспользуемые индексы
psql -U myuser -d mydb -c "SELECT schemaname, tablename, indexname, idx_scan FROM pg_stat_user_indexes WHERE idx_scan = 0 AND NOT indisprimary ORDER BY pg_relation_size(indexrelid) DESC;"
Дамп базы данных
pg_dump -U myuser -d mydb -F c -f mydb.dump