Hans Braxmeier <hans.braxme...@outlook.com> writes:
> After restarting postgres (even with a new cluster) and creating a new
> database, postgres is hanging while extracting the dump: gunzip -c pixabay.gz
> | psql pixabay
> The log file shows that the autovacuum task is running (almost) endless...
> 2017-07-12 18:05:52.367 CEST [19586] hans@pixabay LOG: duration: 11.609 ms
> statement: CREATE INDEX photos_indexphoto_created ON photos_indexphoto USING
> btree (created);
> 2017-07-12 20:34:58.943 CEST [19626] ERROR: canceling autovacuum task
> 2017-07-12 20:34:58.943 CEST [19626] CONTEXT: automatic analyze of table
> "pixabay.public.photos_photo"
> 2017-07-12 20:34:59.942 CEST [19586] hans@pixabay LOG: duration: 8947575.013
> ms statement: CREATE INDEX photos_photo_approved_by_id ON photos_photo USING
> btree (approved_by_id);
What that looks like is it took the system an unusually long time to
notice that it needed to cancel the autovacuum to avoid a deadlock
with the CREATE INDEX. Was either process consuming a noticeable
amount of CPU during that interval? Do you have deadlock_timeout
set higher than the default 1s?
regards, tom lane
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