Horton

Re: Lowering the ever-growing heap->pd_lower

Peter Geoghegan <pg@bowt.ie>

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From: Peter Geoghegan <pg@bowt.ie>
To: Andres Freund <andres@anarazel.de>
Cc: Matthias van de Meent <boekewurm+postgres@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2022-04-07T23:03:41Z
Lists: pgsql-hackers 
On Thu, Apr 7, 2022 at 4:01 PM Andres Freund <andres@anarazel.de> wrote:
> I'm on-board with that - but I think we should rewrite a bunch of places that
> use MaxHeapTuplesPerPage sized-arrays on the stack first. It's not great using
> several KB of stack at the current the current value already (*), but if it grows
> further...

No arguments here. There are probably quite a few places that won't
need to be fixed, because it just doesn't matter, but
lazy_scan_prune() will.

-- 
Peter Geoghegan

Commits

  1. Truncate line pointer array during heap pruning.

  2. Truncate line pointer array during VACUUM.