> Hi,
>
> I have a 1.6TB database with over 330 tables on a 4TB NVMe SSD. All
> tables are static (no updates); most in 8M and 33M row sizes. Queries have
> been great, until recently.
> Also attached is the relevant system journal entries for one query that
> took 2 seconds and two more that took 62 and 52 seconds... Unlike the
> above, these had 3 processes in disk-wait -- see attached screenshot...
>
> I just stopped PG, updated the full backup which was done overnight (so
> the update took about a second), restarted PG and the problem persists...
>
> Any suggestions where to look next?
>
> Thanks,
> Pierre
Hi Pierre,
I have seen this type of behavior when parallel queries were enabled and
PostgreSQL decided that a parallel sequential scan query was the fastest
option. Try disabling them and see if that helps.
Regards,
Ken