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bdbd3d9064
Soon the stats collector will be no more, with statistics instead getting stored in shared memory. There are a lot of references to the stats collector in comments. This commit replaces most of these references with "cumulative statistics system", with the remaining ones getting replaced as part of subsequent commits. This is done separately from the - quite large - shared memory statistics patch to make review easier. Author: Andres Freund <andres@anarazel.de> Reviewed-By: Justin Pryzby <pryzby@telsasoft.com> Reviewed-By: Thomas Munro <thomas.munro@gmail.com> Reviewed-By: Kyotaro Horiguchi <horikyota.ntt@gmail.com> Discussion: https://postgr.es/m/20220303021600.hs34ghqcw6zcokdh@alap3.anarazel.de Discussion: https://postgr.es/m/20220308205351.2xcn6k4x5yivcxyd@alap3.anarazel.de
122 lines
3.7 KiB
Perl
122 lines
3.7 KiB
Perl
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# Copyright (c) 2021-2022, PostgreSQL Global Development Group
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# Test replication statistics data in pg_stat_replication_slots is sane after
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# drop replication slot and restart.
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use strict;
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use warnings;
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use File::Path qw(rmtree);
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use PostgreSQL::Test::Cluster;
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use PostgreSQL::Test::Utils;
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use Test::More;
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# Test set-up
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my $node = PostgreSQL::Test::Cluster->new('test');
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$node->init(allows_streaming => 'logical');
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$node->append_conf('postgresql.conf', 'synchronous_commit = on');
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$node->start;
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# Check that replication slot stats are expected.
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sub test_slot_stats
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{
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local $Test::Builder::Level = $Test::Builder::Level + 1;
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my ($node, $expected, $msg) = @_;
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my $result = $node->safe_psql(
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'postgres', qq[
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SELECT slot_name, total_txns > 0 AS total_txn,
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total_bytes > 0 AS total_bytes
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FROM pg_stat_replication_slots
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ORDER BY slot_name]);
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is($result, $expected, $msg);
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}
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# Create table.
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$node->safe_psql('postgres', "CREATE TABLE test_repl_stat(col1 int)");
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# Create replication slots.
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$node->safe_psql(
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'postgres', qq[
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SELECT pg_create_logical_replication_slot('regression_slot1', 'test_decoding');
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SELECT pg_create_logical_replication_slot('regression_slot2', 'test_decoding');
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SELECT pg_create_logical_replication_slot('regression_slot3', 'test_decoding');
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SELECT pg_create_logical_replication_slot('regression_slot4', 'test_decoding');
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]);
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# Insert some data.
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$node->safe_psql('postgres',
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"INSERT INTO test_repl_stat values(generate_series(1, 5));");
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$node->safe_psql(
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'postgres', qq[
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SELECT data FROM pg_logical_slot_get_changes('regression_slot1', NULL,
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NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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SELECT data FROM pg_logical_slot_get_changes('regression_slot2', NULL,
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NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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SELECT data FROM pg_logical_slot_get_changes('regression_slot3', NULL,
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NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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SELECT data FROM pg_logical_slot_get_changes('regression_slot4', NULL,
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NULL, 'include-xids', '0', 'skip-empty-xacts', '1');
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]);
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# Wait for the statistics to be updated.
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$node->poll_query_until(
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'postgres', qq[
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SELECT count(slot_name) >= 4 FROM pg_stat_replication_slots
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WHERE slot_name ~ 'regression_slot'
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AND total_txns > 0 AND total_bytes > 0;
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]) or die "Timed out while waiting for statistics to be updated";
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# Test to drop one of the replication slot and verify replication statistics data is
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# fine after restart.
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$node->safe_psql('postgres',
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"SELECT pg_drop_replication_slot('regression_slot4')");
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$node->stop;
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$node->start;
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# Verify statistics data present in pg_stat_replication_slots are sane after
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# restart.
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test_slot_stats(
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$node,
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qq(regression_slot1|t|t
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regression_slot2|t|t
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regression_slot3|t|t),
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'check replication statistics are updated');
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# Test to remove one of the replication slots and adjust
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# max_replication_slots accordingly to the number of slots. This leads
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# to a mismatch between the number of slots present in the stats file and the
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# number of stats present in shared memory. We verify
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# replication statistics data is fine after restart.
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$node->stop;
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my $datadir = $node->data_dir;
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my $slot3_replslotdir = "$datadir/pg_replslot/regression_slot3";
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rmtree($slot3_replslotdir);
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$node->append_conf('postgresql.conf', 'max_replication_slots = 2');
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$node->start;
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# Verify statistics data present in pg_stat_replication_slots are sane after
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# restart.
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test_slot_stats(
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$node,
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qq(regression_slot1|t|t
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regression_slot2|t|t),
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'check replication statistics after removing the slot file');
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# cleanup
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$node->safe_psql('postgres', "DROP TABLE test_repl_stat");
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$node->safe_psql('postgres',
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"SELECT pg_drop_replication_slot('regression_slot1')");
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$node->safe_psql('postgres',
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"SELECT pg_drop_replication_slot('regression_slot2')");
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# shutdown
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$node->stop;
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done_testing();
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