Showing posts from November, 2017

Monitoring statements in pg10

Recently we migrated our first client to postgres 10.1, the database used to run on 9.2. Everything went smooth with a total downtime of 12 seconds but obviously monitoring broke so i had to fix that and i thought to share the new statements to save people some trouble. The statements that broke had to do with the change of xlog -> wal (and location -> lsn) which mostly affected replication monitoring statements. Bellow is what i used to have on PG 9 and what i got for PG 10. Replication Slot monitoring Postgres 9: SELECT slot_name, database , active,pg_xlog_location_diff(pg_current_xlog_insert_location(), restart_lsn AS retained_bytes FROM pg_replication_slots; Replication Slot monitoring Postgres 10: SELECT slot_name, database , active, pg_wal_lsn_diff (pg_current_wal_insert_lsn(), restart_lsn) AS retained_bytes FROM pg_replication_slots; Replication Lag monitoring Postgres 9 : SELECT pg_xlog_location_diff(pg_current_xlog_insert_locat