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This adds the statistics about total transactions count and total transaction data logically sent to the decoding output plugin from ReorderBuffer. Users can query the pg_stat_replication_slots view to check these stats. Suggested-by: Andres Freund Author: Vignesh C and Amit Kapila Reviewed-by: Sawada Masahiko, Amit Kapila Discussion: https://postgr.es/m/20210319185247.ldebgpdaxsowiflw@alap3.anarazel.de
77 lines
2.7 KiB
Perl
77 lines
2.7 KiB
Perl
# 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 PostgresNode;
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use TestLib;
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use Test::More tests => 1;
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# Test set-up
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my $node = get_new_node('test');
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$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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# Create table.
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$node->safe_psql('postgres',
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"CREATE TABLE test_repl_stat(col1 int)");
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# Create replication slots.
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$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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$node->safe_psql('postgres', "INSERT INTO test_repl_stat values(generate_series(1, 5));");
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$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', "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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my $result = $node->safe_psql('postgres',
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"SELECT slot_name, total_txns > 0 AS total_txn,
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total_bytes > 0 AS total_bytes FROM pg_stat_replication_slots
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ORDER BY slot_name"
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);
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is($result, qq(regression_slot1|t|t
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regression_slot2|t|t
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regression_slot3|t|t), 'check replication statistics are updated');
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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', "SELECT pg_drop_replication_slot('regression_slot1')");
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$node->safe_psql('postgres', "SELECT pg_drop_replication_slot('regression_slot2')");
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$node->safe_psql('postgres', "SELECT pg_drop_replication_slot('regression_slot3')");
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# shutdown
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$node->stop;
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