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cf54a2c002
The view pg_stat_statements gains two columns: - parallel_workers_to_launch, the number of parallel workers planned to be launched. - parallel_workers_launched, the number of parallel workers actually launched. The ratio of both columns offers hints that parallel workers are lacking on a per-statement basis, requiring some tuning, in coordination with "calls", the number of times a query is executed. As of now, these numbers are tracked within Gather and GatherMerge nodes. They could be extended to utilities that make use of parallel workers (parallel btree and brin, VACUUM). The module is bumped to 1.12. Author: Guillaume Lelarge Discussion: https://postgr.es/m/CAECtzeWtTGOK0UgKXdDGpfTVSa5bd_VbUt6K6xn8P7X+_dZqKw@mail.gmail.com
67 lines
2.6 KiB
SQL
67 lines
2.6 KiB
SQL
-- test old extension version entry points
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CREATE EXTENSION pg_stat_statements WITH VERSION '1.4';
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-- Execution of pg_stat_statements_reset() is granted only to
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-- superusers in 1.4, so this fails.
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SET SESSION AUTHORIZATION pg_read_all_stats;
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SELECT pg_stat_statements_reset();
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RESET SESSION AUTHORIZATION;
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.5';
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-- Execution of pg_stat_statements_reset() should be granted to
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-- pg_read_all_stats now, so this works.
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SET SESSION AUTHORIZATION pg_read_all_stats;
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SELECT pg_stat_statements_reset();
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RESET SESSION AUTHORIZATION;
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-- In 1.6, it got restricted back to superusers.
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.6';
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SET SESSION AUTHORIZATION pg_read_all_stats;
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SELECT pg_stat_statements_reset();
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RESET SESSION AUTHORIZATION;
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SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
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-- New function for pg_stat_statements_reset introduced, still
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-- restricted for non-superusers.
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.7';
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SET SESSION AUTHORIZATION pg_read_all_stats;
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SELECT pg_stat_statements_reset();
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RESET SESSION AUTHORIZATION;
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SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
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SELECT pg_stat_statements_reset();
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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-- New functions and views for pg_stat_statements in 1.8
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.8';
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SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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-- New function pg_stat_statement_info, and new function
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-- and view for pg_stat_statements introduced in 1.9
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.9';
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SELECT pg_get_functiondef('pg_stat_statements_info'::regproc);
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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-- New functions and views for pg_stat_statements in 1.10
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.10';
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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-- New functions and views for pg_stat_statements in 1.11
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.11';
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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-- New parameter minmax_only of pg_stat_statements_reset function
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SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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-- New functions and views for pg_stat_statements in 1.12
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AlTER EXTENSION pg_stat_statements UPDATE TO '1.12';
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\d pg_stat_statements
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SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
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DROP EXTENSION pg_stat_statements;
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