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| author | Andres Freund <andres@anarazel.de> | 2023-05-17 11:17:02 -0700 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2023-05-17 11:17:41 -0700 |
| commit | 322875597c0c15cd85d03c8621038f4945c8caa3 (patch) | |
| tree | 6deb7cf14db09b346857b378025d6f7a3427c7f6 | |
| parent | b9a7a822723aebb16cbe7e5fb874e5124745b07e (diff) | |
| download | postgresql-322875597c0c15cd85d03c8621038f4945c8caa3.tar.gz | |
Use BUFFER_USAGE_LIMIT to reduce needed test table size
Using the minimum BUFFER_USAGE_LIMIT value, we can make one of the pg_stat_io
test tables smaller while still causing reuses.
Author: Melanie Plageman <melanieplageman@gmail.com>
Discussion: https://postgr.es/m/CAAKRu_acc6iL4M3hvOTeztf_ZPpsB3Pqio5aVHgZ5q=Pi3BZKg@mail.gmail.com
| -rw-r--r-- | src/test/regress/expected/stats.out | 6 | ||||
| -rw-r--r-- | src/test/regress/sql/stats.sql | 6 |
2 files changed, 8 insertions, 4 deletions
diff --git a/src/test/regress/expected/stats.out b/src/test/regress/expected/stats.out index 4d965aadb1..ef5608e1d2 100644 --- a/src/test/regress/expected/stats.out +++ b/src/test/regress/expected/stats.out @@ -1396,11 +1396,13 @@ SET wal_skip_threshold = '1 kB'; SELECT sum(reuses) AS reuses, sum(reads) AS reads FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_before_ CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false'); -INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i; +INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 4500)i; -- Ensure that the next VACUUM will need to perform IO by rewriting the table -- first with VACUUM (FULL). VACUUM (FULL) test_io_vac_strategy; -VACUUM (PARALLEL 0) test_io_vac_strategy; +-- Use the minimum BUFFER_USAGE_LIMIT to cause reuses with the smallest table +-- possible. +VACUUM (PARALLEL 0, BUFFER_USAGE_LIMIT 128) test_io_vac_strategy; SELECT pg_stat_force_next_flush(); pg_stat_force_next_flush -------------------------- diff --git a/src/test/regress/sql/stats.sql b/src/test/regress/sql/stats.sql index 4e2c3067f9..0a5d04c22f 100644 --- a/src/test/regress/sql/stats.sql +++ b/src/test/regress/sql/stats.sql @@ -690,11 +690,13 @@ SET wal_skip_threshold = '1 kB'; SELECT sum(reuses) AS reuses, sum(reads) AS reads FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_before_ CREATE TABLE test_io_vac_strategy(a int, b int) WITH (autovacuum_enabled = 'false'); -INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 8000)i; +INSERT INTO test_io_vac_strategy SELECT i, i from generate_series(1, 4500)i; -- Ensure that the next VACUUM will need to perform IO by rewriting the table -- first with VACUUM (FULL). VACUUM (FULL) test_io_vac_strategy; -VACUUM (PARALLEL 0) test_io_vac_strategy; +-- Use the minimum BUFFER_USAGE_LIMIT to cause reuses with the smallest table +-- possible. +VACUUM (PARALLEL 0, BUFFER_USAGE_LIMIT 128) test_io_vac_strategy; SELECT pg_stat_force_next_flush(); SELECT sum(reuses) AS reuses, sum(reads) AS reads FROM pg_stat_io WHERE context = 'vacuum' \gset io_sum_vac_strategy_after_ |