Re: Improving connection scalability: GetSnapshotData() - Mailing list pgsql-hackers

From Andres Freund
Subject Re: Improving connection scalability: GetSnapshotData()
Date
Msg-id 20200904173519.zb7orhmxiyjh3fqm@alap3.anarazel.de
Whole thread Raw
In response to Re: Improving connection scalability: GetSnapshotData()  (Michael Paquier <michael@paquier.xyz>)
Responses Re: Improving connection scalability: GetSnapshotData()
List pgsql-hackers
Hi,

On 2020-09-03 17:18:29 +0900, Michael Paquier wrote:
> On Sun, Aug 16, 2020 at 02:26:57PM -0700, Andres Freund wrote:
> > So we get some builfarm results while thinking about this.
> 
> Andres, there is an entry in the CF for this thread:
> https://commitfest.postgresql.org/29/2500/
> 
> A lot of work has been committed with 623a9ba, 73487a6, 5788e25, etc.
> Now that PGXACT is done, how much work is remaining here?

I think it's best to close the entry. There's substantial further wins
possible, in particular not acquiring ProcArrayLock in GetSnapshotData()
when the cache is valid improves performance substantially. But it's
non-trivial enough that it's probably best dealth with in a separate
patch / CF entry.

Closed.

Greetings,

Andres Freund



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