Horton

Re: heavily contended lwlocks with long wait queues scale badly

Andres Freund <andres@anarazel.de>

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From: Andres Freund <andres@anarazel.de>
To: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Cc: pgsql-hackers@postgresql.org, Thomas Munro <thomas.munro@gmail.com>, Yura Sokolov <y.sokolov@postgrespro.ru>
Date: 2022-11-10T01:03:13Z
Lists: pgsql-hackers 
On 2022-11-09 09:38:08 -0800, Andres Freund wrote:
> I'm on a hike, without any connectivity, Thu afternoon - Sun. I think it's OK
> to push it to HEAD if I get it done in the next few hours. Bigger issues,
> which I do not expect, should show up before tomorrow afternoon. Smaller
> things could wait till Sunday if necessary.

I didn't get to it in time, so I'll leave it for when I'm back.

Commits

  1. lwlock: Fix quadratic behavior with very long wait lists