mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-07-18 08:21:10 +02:00
2589434ae0
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
18 lines
650 B
SQL
18 lines
650 B
SQL
/* contrib/pg_buffercache/pg_buffercache--1.3--1.4.sql */
|
|
|
|
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
|
|
\echo Use "ALTER EXTENSION pg_buffercache UPDATE TO '1.4'" to load this file. \quit
|
|
|
|
CREATE FUNCTION pg_buffercache_summary(
|
|
OUT buffers_used int4,
|
|
OUT buffers_unused int4,
|
|
OUT buffers_dirty int4,
|
|
OUT buffers_pinned int4,
|
|
OUT usagecount_avg float8)
|
|
AS 'MODULE_PATHNAME', 'pg_buffercache_summary'
|
|
LANGUAGE C PARALLEL SAFE;
|
|
|
|
-- Don't want these to be available to public.
|
|
REVOKE ALL ON FUNCTION pg_buffercache_summary() FROM PUBLIC;
|
|
GRANT EXECUTE ON FUNCTION pg_buffercache_summary() TO pg_monitor;
|