Horton

Provide ReadRecentBuffer() to re-pin buffers by ID.

Thomas Munro <tmunro@postgresql.org>

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Commit: 2f27f8c511494cca9e0e9a4eeeb102fa9f193002
Author: Thomas Munro <tmunro@postgresql.org>
Date: 2021-04-08T05:50:25Z
Releases: 14.0 
Provide ReadRecentBuffer() to re-pin buffers by ID.

If you know the ID of a buffer that recently held a block that you would
like to pin, this function can be used check if it's still there.  It
can be used to avoid a second lookup in the buffer mapping table after
PrefetchBuffer() reports a cache hit.

Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA+hUKGJ4VJN8ttxScUFM8dOKX0BrBiboo5uz1cq=AovOddfHpA@mail.gmail.com

Files

PathChange+/−
src/backend/storage/buffer/bufmgr.c modified +78 −0
src/include/storage/bufmgr.h modified +2 −0

Discussion