Logging slow queries on Google Cloud SQL PostgreSQL instances

Question

The company I work for uses Google Cloud SQL to manage their SQL databases in production.

We\'re having performance issues and I thought it\'d be a good idea (among othe

Answer 1

Not ideal by any measure, but what we do is run something like this on a cron once a minute and log out the result:

SELECT EXTRACT(EPOCH FROM now() - query_start) AS seconds, query
 FROM  pg_stat_activity 
 WHERE state = 'active' AND now() - query_start > interval '1 seconds' AND query NOT LIKE '%pg_stat_activity%'
 ORDER BY seconds DESC LIMIT 20

You'd need to fiddle with the query to get millisecond granularity, and even then it'll only catch queries that overlap with your cron frequency, but probably better than nothing?