From: Melanie Plageman <melanieplageman@gmail.com>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Count pages set all-visible and all-frozen in VM during vacuum
Date: Tue, 17 Dec 2024 19:21:18 +0000
Message-ID: <E1tNd8A-0004wB-4P@gemulon.postgresql.org> (raw)
Count pages set all-visible and all-frozen in VM during vacuum
Heap vacuum already counts and logs pages with newly frozen tuples. Now
count and log the number of pages newly set all-visible and all-frozen
in the visibility map.
Pages that are all-visible but not all-frozen are debt for future
aggressive vacuums. The counts of newly all-visible and all-frozen pages
give us insight into the rate at which this debt is being accrued and
paid down.
Author: Melanie Plageman
Reviewed-by: Masahiko Sawada, Alastair Turner, Nitin Jadhav, Andres Freund, Bilal Yavuz, Tomas Vondra
Discussion: https://postgr.es/m/flat/CAAKRu_ZQe26xdvAqo4weHLR%3DivQ8J4xrSfDDD8uXnh-O-6P6Lg%40mail.gmail.com#6d8d...,
https://postgr.es/m/ctdjzroezaxmiyah3gwbwm67defsrwj2b5fpfs4ku6msfpxeia%40mwjyqlhwr2wu
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/dc6acfd910b868351f115382fd92f95e5345992c
Modified Files
--------------
src/backend/access/heap/vacuumlazy.c | 123 +++++++++++++++++++++++++++++++----
1 file changed, 111 insertions(+), 12 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: melanieplageman@gmail.com, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Count pages set all-visible and all-frozen in VM during vacuum
In-Reply-To: <E1tNd8A-0004wB-4P@gemulon.postgresql.org>
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