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base repository: postgresql-cfbot/postgresql
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head repository: postgresql-cfbot/postgresql
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  • 2 commits
  • 8 files changed
  • 2 contributors

Commits on Apr 8, 2025

  1. Add pg_buffercache_evict_{relation,all} functions 

    In addition to the added functions, the pg_buffercache_evict() function now
shows whether the buffer was flushed.

pg_buffercache_evict_relation(): Evicts all shared buffers in a
relation at once.
pg_buffercache_evict_all(): Evicts all shared buffers at once.

Both functions provide mechanism to evict multiple shared buffers at
once. They are designed to address the inefficiency of repeatedly calling
pg_buffercache_evict() for each individual buffer, which can be time-consuming
when dealing with large shared buffer pools. (e.g., ~477ms vs. ~2576ms for
16GB of fully populated shared buffers).

These functions are intended for developer testing and debugging
purposes and are available to superusers only.

Minimal tests for the new functions are included. Also, there was no test for
pg_buffercache_evict(), test for this added too.

No new extension version is needed, as it was already increased this release
by ba2a3c2.

Author: Nazir Bilal Yavuz <[email protected]>
Reviewed-by: Andres Freund <[email protected]>
Reviewed-by: Aidar Imamov <[email protected]>
Reviewed-by: Joseph Koshakow <[email protected]>
Discussion: https://postgr.es/m/CAN55FZ0h_YoSqqutxV6DES1RW8ig6wcA8CR9rJk358YRMxZFmw%40mail.gmail.com
    @anarazel
    anarazel authored and Commitfest Bot committed Apr 8, 2025
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  2. [CF 5493] v8 - Add pg_buffercache_evict_all() and pg_buffercache_mark… 

    …_dirty[_all]() functions

This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5493

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/itcll7zmkvmuyqkcicztyk3pvjr5fkxsadd6hr4dpcrbtgcdox@3mk7hjiecyvr
Author(s): Nazir Bilal Yavuz
    Commitfest Bot committed Apr 8, 2025
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