测量长时间运行的数据库事务

SELECT
  service,
  transaction_name,
  release,
  COUNT(*) AS transactions,
  approx_percentile_cont(duration_ms, 0.95) AS p95_duration_ms,
  MAX(duration_ms) AS max_duration_ms,
  SUM(CASE WHEN outcome <> 'committed' THEN 1 ELSE 0 END) AS unsuccessful
FROM database_transaction_events
WHERE timestamp_utc >= now() - INTERVAL '7 days'
GROUP BY service, transaction_name, release
ORDER BY p95_duration_ms DESC, unsuccessful DESC;