From: Andrey Borodin <x4mmm(at)yandex-team(dot)ru>
To: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Костя Кузнецов <chapaev28(at)ya(dot)ru>
Subject: Re: GiST VACUUM
Date: 2018-07-19 10:52:34
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> 19 июля 2018 г., в 1:12, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> написал(а):
> Yeah, please, I think this is the way to go.

Here's v11 divided into proposed steps.

In second step I still use paloc's memory, but only to store two bitmaps: bitmap of internal pages and bitmap of empty leafs. Second physical scan only reads internal pages. I can omit that bitmap, if I'll scan everything.
Also, I can replace emptyLeafs bitmap with array\list, but I do not really think it will be big.

Anyway I propose focusing on first step.

Best regards, Andrey Borodin.

Attachment Content-Type Size
0002-Delete-pages-during-GiST-VACUUM-v11.patch application/octet-stream 19.5 KB
0001-Physical-GiST-scan-in-VACUUM-v11.patch application/octet-stream 8.4 KB

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