Re: snapshot too old, configured by time - Mailing list pgsql-hackers

From Peter Geoghegan
Subject Re: snapshot too old, configured by time
Date
Msg-id CAM3SWZRw88gMAHzVP53Wd9Bqo-Rk0X2g8Gr9e_PE2O2_+WbibA@mail.gmail.com
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In response to Re: snapshot too old, configured by time  (Jeff Janes <jeff.janes@gmail.com>)
Responses Re: snapshot too old, configured by time  (Jeff Janes <jeff.janes@gmail.com>)
List pgsql-hackers
On Sun, Apr 3, 2016 at 2:09 PM, Jeff Janes <jeff.janes@gmail.com> wrote:
> Also, HOT-cleanup should stop the bloat increase once the snapshot
> crosses the old_snapshot_threshold without even needing to wait until
> the next autovac runs.
>
> Does the code intentionally only work for manual vacuums?  If so, that
> seems quite surprising.  Or perhaps I am missing something else here.

What proportion of the statements in your simulated workload were
updates? Per my last mail to this thread, I'm interested in knowing if
this was a delete heavy workload.

-- 
Peter Geoghegan



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