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postgresqlpostgresql-9.3rails-postgresql

postgresql 9.3 log slow queries

I am using Rails application with Postgres 9.3 database and doing some performance fixes. I would like to know how to find out slowest queries in log files. let say queries taking more then 30ms.

Solution

  • In postgresql.conf you should uncomment line

    #log_min_duration_statement = -1

    and change its value to 30. This way queries longer than 30ms will be logged