| From: | Alexander Korotkov <a(dot)korotkov(at)postgrespro(dot)ru> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Merlin Moncure <mmoncure(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, YUriy Zhuravlev <u(dot)zhuravlev(at)postgrespro(dot)ru>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Move PinBuffer and UnpinBuffer to atomics |
| Date: | 2016-04-10 05:36:10 |
| Message-ID: | CAPpHfdu09fSG2XoCeq1K2sfBf67pc6WnX3z_hN4fkVO0G4Uiyg@mail.gmail.com |
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On Sat, Apr 9, 2016 at 10:49 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
>
> On April 9, 2016 12:43:03 PM PDT, Andres Freund <andres(at)anarazel(dot)de>
> wrote:
> >On 2016-04-09 22:38:31 +0300, Alexander Korotkov wrote:
> >> There are results with 5364b357 reverted.
> >
> >Crazy that this has such a negative impact. Amit, can you reproduce
> >that? Alexander, I guess for r/w workload 5364b357 is a benefit on that
> >machine as well?
>
> How sure are you about these measurements?
I'm pretty sure. I've retried it multiple times by hand before re-run the
script.
> Because there really shouldn't be clog lookups one a steady state is
> reached...
>
Hm... I'm also surprised. There shouldn't be clog lookups once hint bits
are set.
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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