| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org,Robert Haas <robertmhaas(at)gmail(dot)com>,Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>,pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: POC: Cache data in GetSnapshotData() |
| Date: | 2017-09-21 02:32:36 |
| Message-ID: | CB10979C-1FB1-42DA-A322-5E8D1541927A@anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
On September 20, 2017 7:22:00 PM PDT, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>On Wed, Sep 20, 2017 at 10:04 PM, Mithun Cy
><mithun(dot)cy(at)enterprisedb(dot)com> wrote:
>> My current tests show on scylla (2 socket machine with 28 CPU core) I
>> do not see any improvement at all as similar to Jesper. But same
>tests
>> on power2 (4 sockets) and Cthulhu(8 socket machine) we can see
>> improvements.
>
>OK, makes sense. So for whatever reason, this appears to be something
>that will only help users with >2 sockets. But that's not necessarily
>a bad thing.
Wonder how much of that is microarchitecture, how much number of sockets.
Andres
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Sent from my Android device with K-9 Mail. Please excuse my brevity.
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