On Fri, 2020-06-19 at 11:46 +0300, Toomas Kristin wrote: > I executed a database dump with 4 jobs and here are logs how this ended. > > 2020-06-19 02:38:28 UTC:[30953]:ERROR:40001:canceling statement due to conflict with recovery > 2020-06-19 02:38:28 UTC:[30953]:DETAIL:User query might have needed to see row versions that must be removed. > 2020-06-19 02:38:28 UTC:[30953]:LOCATION:ProcessInterrupts, postgres.c:3057 > 2020-06-19 02:38:28 UTC:[30953]:STATEMENT: > 2020-06-19 02:38:28 UTC:[30926]:FATAL:40001:terminating connection due to conflict with recovery > 2020-06-19 02:38:28 UTC:[30926]:DETAIL:User query might have needed to see row versions that must be removed. > 2020-06-19 02:38:28 UTC:[30926]:HINT:In a moment you should be able to reconnect to the database and repeat your command. > 2020-06-19 02:38:28 UTC:[30926]:LOCATION:ProcessInterrupts, postgres.c:2987 > 2020-06-19 02:38:28 UTC:[30952]:ERROR:40001:canceling statement due to conflict with recovery > 2020-06-19 02:38:28 UTC:[30952]:DETAIL:User query might have needed to see row versions that must be removed. > 2020-06-19 02:38:28 UTC:[30952]:LOCATION:ProcessInterrupts, postgres.c:3057 > 2020-06-19 02:38:28 UTC:[30952]:STATEMENT: > 2020-06-19 02:38:28 UTC:[30953]:LOG:08006:could not receive data from client:Connection reset by peer > 2020-06-19 02:38:28 UTC:[30953]:LOCATION:pq_recvbuf, pqcomm.c:978 > > Does it give any hints for anyone? Or how to find right version of source code what to analyse? Yes, that are conflicts with VACUUM. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com