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f3fa31327e
It was pointed out that pg_buffercache_summary()'s report of the overall average usage count isn't that useful, and what would be more helpful in many cases is to report totals for each possible usage count. Add a new function to do it like that. Since pg_buffercache 1.4 is already new for v16, we don't need to create a new extension version; we'll just define this as part of 1.4. Nathan Bossart Discussion: https://postgr.es/m/20230130233040.GA2800702@nathanxps13
29 lines
1021 B
SQL
29 lines
1021 B
SQL
/* contrib/pg_buffercache/pg_buffercache--1.3--1.4.sql */
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-- complain if script is sourced in psql, rather than via ALTER EXTENSION
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\echo Use "ALTER EXTENSION pg_buffercache UPDATE TO '1.4'" to load this file. \quit
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CREATE FUNCTION pg_buffercache_summary(
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OUT buffers_used int4,
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OUT buffers_unused int4,
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OUT buffers_dirty int4,
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OUT buffers_pinned int4,
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OUT usagecount_avg float8)
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AS 'MODULE_PATHNAME', 'pg_buffercache_summary'
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LANGUAGE C PARALLEL SAFE;
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CREATE FUNCTION pg_buffercache_usage_counts(
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OUT usage_count int4,
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OUT buffers int4,
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OUT dirty int4,
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OUT pinned int4)
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RETURNS SETOF record
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AS 'MODULE_PATHNAME', 'pg_buffercache_usage_counts'
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LANGUAGE C PARALLEL SAFE;
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-- Don't want these to be available to public.
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REVOKE ALL ON FUNCTION pg_buffercache_summary() FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION pg_buffercache_summary() TO pg_monitor;
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REVOKE ALL ON FUNCTION pg_buffercache_usage_counts() FROM PUBLIC;
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GRANT EXECUTE ON FUNCTION pg_buffercache_usage_counts() TO pg_monitor;
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