Re: Queries intermittently slow

On 1/6/16, 11:14 PM, "Jim Nasby" <Jim.Nasby@BlueTreble.com> wrote:


>On 1/6/16 12:01 PM, Scott Rankin wrote:
>> I guess we’re back to lock contention?
>
>Is there by chance an anti-wraparound vacuum happening on that table?
>
>Actually, for that matter... if autovacuum is hitting that table it's
>locking could be causing problems, and it won't release it's locks until
>the deadlock detector kicks in.
>--
>Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
>Experts in Analytics, Data Architecture and PostgreSQL
>Data in Trouble? Get it in Treble! http://BlueTreble.com

Hi Jim, Tom,

Thanks both of you for your help, by the way.

I lowered the deadlock_timeout this morning to 100ms and ran for a little while, but I did not see any lock waits even
whenthe statements ran slowly.
 

Jim, to your point, I enabled auto vacuum logging (log_autovacuum_min_duration=0) but no vacuums are taking place even
whenI see slow queries.
 

Any other ideas?

Thanks,
Scott
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