65 lines
3.6 KiB
Plaintext
65 lines
3.6 KiB
Plaintext
CREATE EXTENSION pg_stat_monitor;
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SET pg_stat_monitor.pgsm_normalized_query='off';
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CREATE TABLE t1 (a TEXT, b TEXT, c TEXT);
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SELECT pg_stat_monitor_reset();
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pg_stat_monitor_reset
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-----------------------
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(1 row)
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-- First test, execute cheap query then heavy query.
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-- Ensure denormalized heavy query replaces the cheaper one.
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PREPARE prepstmt(TEXT, TEXT, TEXT) AS INSERT INTO t1(a, b, c) VALUES($1, $2, $3);
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EXECUTE prepstmt('A', 'B', 'C');
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
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substring | calls
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--------------------------------------------------------------------------------+-------
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PREPARE prepstmt(TEXT, TEXT, TEXT) AS INSERT INTO t1(a, b, c) VALUES(A, B, C); | 1
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SELECT pg_stat_monitor_reset() | 1
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(2 rows)
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EXECUTE prepstmt(REPEAT('XYZ', 8192), md5(random()::text), REPEAT('RANDOM', 4096));
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
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substring | calls
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---------------------------------------------------------------------------------------------------------------------------------+-------
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PREPARE prepstmt(TEXT, TEXT, TEXT) AS INSERT INTO t1(a, b, c) VALUES(XYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZX | 2
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C" | 1
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SELECT pg_stat_monitor_reset() | 1
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(3 rows)
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TRUNCATE TABLE t1;
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SELECT pg_stat_monitor_reset();
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pg_stat_monitor_reset
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-----------------------
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(1 row)
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-- Second test, execute heavy query then cheap query.
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-- Ensure denormalized heavy query is not replaced by the cheaper one.
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EXECUTE prepstmt(REPEAT('XYZ', 8192), md5(random()::text), REPEAT('RANDOM', 4096));
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
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substring | calls
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---------------------------------------------------------------------------------------------------------------------------------+-------
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PREPARE prepstmt(TEXT, TEXT, TEXT) AS INSERT INTO t1(a, b, c) VALUES(XYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZX | 1
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SELECT pg_stat_monitor_reset() | 1
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(2 rows)
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EXECUTE prepstmt('A', 'B', 'C');
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C";
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substring | calls
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---------------------------------------------------------------------------------------------------------------------------------+-------
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PREPARE prepstmt(TEXT, TEXT, TEXT) AS INSERT INTO t1(a, b, c) VALUES(XYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZXYZX | 2
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SELECT SUBSTRING(query, 0, 128), calls FROM pg_stat_monitor ORDER BY query COLLATE "C" | 1
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SELECT pg_stat_monitor_reset() | 1
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(3 rows)
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DROP TABLE t1;
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SELECT pg_stat_monitor_reset();
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pg_stat_monitor_reset
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-----------------------
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(1 row)
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SET pg_stat_monitor.pgsm_normalized_query='on';
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DROP EXTENSION pg_stat_monitor;
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