Обсуждение: Backups failing despite many settings that should prevent it
Hi all,
I've been getting some backup failures when trying to back up a fairly large database. I've tried setting:
* vacuum_defer_cleanup_age very high on the master
* hot_standby_feedback = on on the slave
* max_standby_streaming_delay = 300s and max_standby_archive_delay = 300s on the slave
* vacuum_defer_cleanup_age very high on the master
* hot_standby_feedback = on on the slave
* max_standby_streaming_delay = 300s and max_standby_archive_delay = 300s on the slave
Nothing seems to stop it failing intermittently. The error I'm getting is below:
pg_dump: Dumping the contents of table "impressions" failed: PQgetResult() failed.
pg_dump: Error message from server: ERROR: canceling statement due to conflict with recovery
DETAIL: User was holding a relation lock for too long.
pg_dump: The command was: COPY public.impressions (id, ... ) TO stdout;
The following system errors were returned:
Errno::EPERM: Operation not permitted - 'pg_dump' returned exit code: 1
pg_dump: Dumping the contents of table "impressions" failed: PQgetResult() failed.
pg_dump: Error message from server: ERROR: canceling statement due to conflict with recovery
DETAIL: User was holding a relation lock for too long.
pg_dump: The command was: COPY public.impressions (id, ... ) TO stdout;
The following system errors were returned:
Errno::EPERM: Operation not permitted - 'pg_dump' returned exit code: 1
Any ideas what setting I'm missing?
Thanks,
John Sherwood <john.sherwood.was.taken@gmail.com> writes: > I've been getting some backup failures when trying to back up a fairly > large database. I've tried setting: > * vacuum_defer_cleanup_age very high on the master > * hot_standby_feedback = on on the slave > * max_standby_streaming_delay = 300s and max_standby_archive_delay = 300s > on the slave > Nothing seems to stop it failing intermittently. The error I'm getting is > below: > pg_dump: Dumping the contents of table "impressions" failed: > PQgetResult() failed. > pg_dump: Error message from server: ERROR: canceling statement due to > conflict with recovery > DETAIL: User was holding a relation lock for too long. > pg_dump: The command was: COPY public.impressions (id, ... ) TO stdout; > The following system errors were returned: > Errno::EPERM: Operation not permitted - 'pg_dump' returned exit code: 1 > Any ideas what setting I'm missing? Sure looks like max_standby_streaming_delay violation from here. You sure 300s is enough time to back up your "fairly large" database? How long does the pg_dump run before failing, anyway? regards, tom lane