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This patch adds 'stats_since' and 'minmax_stats_since' columns to the pg_stat_statements view and pg_stat_statements() function. The new min/max reset mode for the pg_stat_stetments_reset() function is controlled by the parameter minmax_only. 'stat_since' column is populated with the current timestamp when a new statement is added to the pg_stat_statements hashtable. It provides clean information about statistics collection time intervals for each statement. Besides it can be used by sampling solutions to detect situations when a statement was evicted and stored again between samples. Such a sampling solution could derive any pg_stat_statements statistic values for an interval between two samples with the exception of all min/max statistics. To address this issue this patch adds the ability to reset min/max statistics independently of the statement reset using the new minmax_only parameter of the pg_stat_statements_reset(userid oid, dbid oid, queryid bigint, minmax_only boolean) function. The timestamp of such reset is stored in the minmax_stats_since field for each statement. pg_stat_statements_reset() function now returns the timestamp of a reset as the result. Discussion: https://postgr.es/m/flat/72e80e7b160a6eb189df9ef6f068cce3765d37f8.camel%40moonset.ru Author: Andrei Zubkov Reviewed-by: Julien Rouhaud, Hayato Kuroda, Yuki Seino, Chengxi Sun Reviewed-by: Anton Melnikov, Darren Rush, Michael Paquier, Sergei Kornilov Reviewed-by: Alena Rybakina, Andrei Lepikhov
63 lines
1.7 KiB
Meson
63 lines
1.7 KiB
Meson
# Copyright (c) 2022-2023, PostgreSQL Global Development Group
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pg_stat_statements_sources = files(
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'pg_stat_statements.c',
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)
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if host_system == 'windows'
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pg_stat_statements_sources += rc_lib_gen.process(win32ver_rc, extra_args: [
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'--NAME', 'pg_stat_statements',
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'--FILEDESC', 'pg_stat_statements - execution statistics of SQL statements',])
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endif
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pg_stat_statements = shared_module('pg_stat_statements',
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pg_stat_statements_sources,
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kwargs: contrib_mod_args + {
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'dependencies': contrib_mod_args['dependencies'],
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},
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)
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contrib_targets += pg_stat_statements
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install_data(
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'pg_stat_statements.control',
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'pg_stat_statements--1.4.sql',
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'pg_stat_statements--1.10--1.11.sql',
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'pg_stat_statements--1.9--1.10.sql',
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'pg_stat_statements--1.8--1.9.sql',
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'pg_stat_statements--1.7--1.8.sql',
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'pg_stat_statements--1.6--1.7.sql',
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'pg_stat_statements--1.5--1.6.sql',
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'pg_stat_statements--1.4--1.5.sql',
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'pg_stat_statements--1.3--1.4.sql',
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'pg_stat_statements--1.2--1.3.sql',
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'pg_stat_statements--1.1--1.2.sql',
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'pg_stat_statements--1.0--1.1.sql',
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kwargs: contrib_data_args,
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)
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tests += {
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'name': 'pg_stat_statements',
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'sd': meson.current_source_dir(),
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'bd': meson.current_build_dir(),
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'regress': {
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'sql': [
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'select',
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'dml',
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'cursors',
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'utility',
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'level_tracking',
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'planning',
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'user_activity',
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'wal',
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'entry_timestamp',
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'cleanup',
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'oldextversions',
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],
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'regress_args': ['--temp-config', files('pg_stat_statements.conf')],
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# Disabled because these tests require
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# "shared_preload_libraries=pg_stat_statements", which typical
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# runningcheck users do not have (e.g. buildfarm clients).
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'runningcheck': false,
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},
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}
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