| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com>, "Imai, Yoshikazu" <imai(dot)yoshikazu(at)jp(dot)fujitsu(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Simon Riggs <simon(at)2ndquadrant(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Speed up transaction completion faster after many relations are accessed in a transaction |
| Date: | 2019-04-07 15:40:52 |
| Message-ID: | CAKJS1f_eLoAzWyTgTy7Cafve_brB8VWw_BezNh5cTz0Bz_AjYg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, 8 Apr 2019 at 03:20, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> writes:
> > The reason I thought it was a good idea to track some history there
> > was to stop the lock table constantly being shrunk back to the default
> > size every time a simple single table query was executed.
>
> I think that's probably gilding the lily, considering that this whole
> issue is pretty new. There's no evidence that expanding the local
> lock table is a significant drag on queries that need a lot of locks.
Okay. Here's another version with all the average locks code removed
that only recreates the table when it's completely empty.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
| Attachment | Content-Type | Size |
|---|---|---|
| shrink_bloated_locallocktable_v2.patch | application/octet-stream | 2.3 KB |
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