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f8a1c1d5a3
Commit 7f46eaf added the regression test which checks that
gin_clean_pending_list() cleans up the GIN pending list and returns >0.
This usually works fine. But if autovacuum comes along and cleans
the list before gin_clean_pending_list() starts, the function may
return 0, and then the regression test may fail.
To fix the problem, this commit disables autovacuum on the target
index of gin_clean_pending_list() by setting autovacuum_enabled
reloption to off when creating the table.
Also this commit sets gin_pending_list_limit reloption to 4MB on
the target index. Otherwise when running "make installcheck" with
small gin_pending_list_limit GUC, insertions of data may trigger
the cleanup of pending list before gin_clean_pending_list() starts
and the function may return 0. This could cause the regression test
to fail.
Per buildfarm member spoonbill.
Reported-By: Tom Lane
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
--
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-- Test GIN indexes.
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--
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-- There are other tests to test different GIN opclassed. This is for testing
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-- GIN itself.
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-- Create and populate a test table with a GIN index.
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create table gin_test_tbl(i int4[]) with (autovacuum_enabled = off);
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create index gin_test_idx on gin_test_tbl using gin (i)
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with (fastupdate = on, gin_pending_list_limit = 4096);
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insert into gin_test_tbl select array[1, 2, g] from generate_series(1, 20000) g;
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insert into gin_test_tbl select array[1, 3, g] from generate_series(1, 1000) g;
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select gin_clean_pending_list('gin_test_idx')>10 as many; -- flush the fastupdate buffers
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many
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------
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t
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(1 row)
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insert into gin_test_tbl select array[3, 1, g] from generate_series(1, 1000) g;
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vacuum gin_test_tbl; -- flush the fastupdate buffers
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select gin_clean_pending_list('gin_test_idx'); -- nothing to flush
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gin_clean_pending_list
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------------------------
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0
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(1 row)
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-- Test vacuuming
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delete from gin_test_tbl where i @> array[2];
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vacuum gin_test_tbl;
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-- Disable fastupdate, and do more insertions. With fastupdate enabled, most
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-- insertions (by flushing the list pages) cause page splits. Without
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-- fastupdate, we get more churn in the GIN data leaf pages, and exercise the
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-- recompression codepaths.
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alter index gin_test_idx set (fastupdate = off);
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insert into gin_test_tbl select array[1, 2, g] from generate_series(1, 1000) g;
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insert into gin_test_tbl select array[1, 3, g] from generate_series(1, 1000) g;
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delete from gin_test_tbl where i @> array[2];
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vacuum gin_test_tbl;
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