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pg_buffercache: Add pg_buffercache_summary()

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Using pg_buffercache_summary() is significantly cheaper than querying
pg_buffercache and summarizing in SQL.

Author: Melih Mutlu <m.melihmutlu@gmail.com>
Reviewed-by: Andres Freund <andres@anarazel.de>
Reviewed-by: Aleksander Alekseev <aleksander@timescale.com>
Reviewed-by: Zhang Mingli <zmlpostgres@gmail.com>
Discussion: https://postgr.es/m/CAGPVpCQAXYo54Q%3D8gqBsS%3Du0uk9qhnnq4%2B710BtUhUisX1XGEg%40mail.gmail.com
This commit is contained in:
Andres Freund
2022-10-13 09:55:46 -07:00
parent 7f8d9cedb3
commit 2589434ae0
8 changed files with 250 additions and 5 deletions
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2
contrib/pg_buffercache/pg_buffercache.control
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@ -1,5 +1,5 @@
# pg_buffercache extension
comment = 'examine the shared buffer cache'
default_version = '1.3'
default_version = '1.4'
module_pathname = '$libdir/pg_buffercache'
relocatable = true