Diagnosing Slow Commits in Postgres

Laurenz Albe offers up some thoughts:

Sometimes one of our customers looks at the most time consuming statements in a database (either with pg_stat_statements or with pgBadger) and finds COMMIT in the high ranks. Normally, COMMIT is a very fast statement in PostgreSQL, so that is worth investigating. In this article, I will explore the possible reasons for a slow COMMIT and discuss what you can do about it.

Read on for those reasons.