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Showing posts from March, 2018

Postgres Query Stats using pg_stat_statements

Just wanted to share how to configure Postgres to capture query statistics using pg_stat_statements , including how often queries are run, how long they take to execute, along with a whole host of other useful information. First, you need to edit the Postgres configuration, adding pg_stat_statements to preshared libraries shared_preload_libraries = 'pg_stat_statements' pg_stat_statements.track = all After editing postgresql.conf, restart postgres. On Ubuntu sudo /etc/init.d/postgresql stop sudo /etc/init.d/postgresql start After restarting Postgres, you need to enabled the pg_stat_statements extension. You can enable it per database, or for all databases on the same Postgres server by installing on the postgres database. CREATE EXTENSION pg_stat_statements; Once pg_stat_statements is added to the preshared libraries and the extension is enabled, you can query pg_stat_statements to get useful information about running queries. SELECT   query,   sum(calls)