Here's a patch to clarify the BRIN indexes documentation, particularly with regards to autosummarize, vacuum and autovacuum. It basically breaks down a big blob of a paragraph into multiple paragraphs for clarity, plus explicitly tells how summarization happens manually or automatically.
I also added cross-references to various relevant sections, including the create index page. On this topic... I'm not familiar with with the internals of BRIN indexes and in backend/access/common/reloptions.c I see: { "autosummarize", "Enables automatic summarization on this BRIN index", RELOPT_KIND_BRIN, AccessExclusiveLock }, Is the exclusive lock on the index why autosummarize is off by default? What would be the downside (if any) of having autosummarize=on by default? Roberto -- Crunchy Data - passion for open source PostgreSQL
brin-autosummarize-docs.patch
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