On Tue, Sep 25, 2018 at 11:00 AM, Daniel Wood <hexexpert@comcast.net> wrote:
> I was about to suggest creating a single shared snapshot instead of having
> multiple backends compute what is essentially the same snapshot. Luckily,
> before posting, I discovered Avoiding repeated snapshot computation from
> Pavan and POC: Cache data in GetSnapshotData() from Andres.
>
I think Mithun has also worked on this[1] and posted some analysis
about which cases he has seen improvement and also the cases where it
did not perform well, you might want to have a look.
[1] https://www.postgresql.org/message-id/CAD__OujRZEjE5y3vfmmZmSSr3oYGZSHRxwDwF7kyhBHB2BpW_g%40mail.gmail.com
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Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com