2021-04-09 08:00:08.692 IDTERROR: canceling statement due to statement timeout 2021-04-09 08:00:08.692 IDTCONTEXT: PL/pgSQL function orhpans_active_clean_table(character varying,integer) line 42 at FETCH PL/pgSQL function orhpans_active_removal() line 31 at assignment PL/pgSQL function ajf_backup(integer) line 39 at assignment Can a FETCH fail if the table is locked? The FETCH is stuck for the <statement_timeout> time. Should I lock all tables involved with the query? Any specific time-out on the fetch? Or should I use the general statement-timeout? I mean move from regular programming mode to paranoidic mode.... The failure is inconsistent.. Never fails in PG 11.5, but fails in PG9.5.5 about once a week... I need a full understanding of the problem in order to force big,slow customers to migrate to PG11.5. Thanks Danny