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Add regression test for recovery pause.

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Previously there was no regression test for recovery pause feature.
This commit adds the test that checks

- recovery can be paused or resumed expectedly
- pg_get_wal_replay_pause_state() reports the correct pause state
- the paused state ends and promotion continues if a promotion
   is triggered while recovery is paused

Suggested-by: Michael Paquier
Author: Fujii Masao
Reviewed-by: Kyotaro Horiguchi, Dilip Kumar
Discussion: https://postgr.es/m/YKNirzqM1HYyk5h4@paquier.xyz
This commit is contained in:
Fujii Masao 2021-06-02 12:19:39 +09:00
parent 42344ad0ed
commit 6bbc5c5e96
1 changed files with 57 additions and 2 deletions
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59
src/test/recovery/t/005_replay_delay.pl
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@ -1,13 +1,13 @@
# Copyright (c) 2021, PostgreSQL Global Development Group
# Checks for recovery_min_apply_delay
# Checks for recovery_min_apply_delay and recovery pause
use strict;
use warnings;
use PostgresNode;
use TestLib;
use Test::More tests => 1;
use Test::More tests => 3;
# Initialize primary node
my $node_primary = get_new_node('primary');
@ -55,3 +55,58 @@ $node_standby->poll_query_until('postgres',
# the configured apply delay.
ok(time() - $primary_insert_time >= $delay,
"standby applies WAL only after replication delay");
# Check that recovery can be paused or resumed expectedly.
my $node_standby2 = get_new_node('standby2');
$node_standby2->init_from_backup($node_primary, $backup_name,
has_streaming => 1);
$node_standby2->start;
# Recovery is not yet paused.
is($node_standby2->safe_psql('postgres',
"SELECT pg_get_wal_replay_pause_state()"),
'not paused', 'pg_get_wal_replay_pause_state() reports not paused');
# Request to pause recovery and wait until it's actually paused.
$node_standby2->safe_psql('postgres', "SELECT pg_wal_replay_pause()");
$node_primary->safe_psql('postgres',
"INSERT INTO tab_int VALUES (generate_series(21,30))");
$node_standby2->poll_query_until('postgres',
"SELECT pg_get_wal_replay_pause_state() = 'paused'")
or die "Timed out while waiting for recovery to be paused";
# Even if new WAL records are streamed from the primary,
# recovery in the paused state doesn't replay them.
my $receive_lsn = $node_standby2->safe_psql('postgres',
"SELECT pg_last_wal_receive_lsn()");
my $replay_lsn = $node_standby2->safe_psql('postgres',
"SELECT pg_last_wal_replay_lsn()");
$node_primary->safe_psql('postgres',
"INSERT INTO tab_int VALUES (generate_series(31,40))");
$node_standby2->poll_query_until('postgres',
"SELECT '$receive_lsn'::pg_lsn < pg_last_wal_receive_lsn()")
or die "Timed out while waiting for new WAL to be streamed";
is($node_standby2->safe_psql('postgres',
"SELECT pg_last_wal_replay_lsn()"),
qq($replay_lsn), 'no WAL is replayed in the paused state');
# Request to resume recovery and wait until it's actually resumed.
$node_standby2->safe_psql('postgres', "SELECT pg_wal_replay_resume()");
$node_standby2->poll_query_until('postgres',
"SELECT pg_get_wal_replay_pause_state() = 'not paused' AND pg_last_wal_replay_lsn() > '$replay_lsn'::pg_lsn")
or die "Timed out while waiting for recovery to be resumed";
# Check that the paused state ends and promotion continues if a promotion
# is triggered while recovery is paused.
$node_standby2->safe_psql('postgres', "SELECT pg_wal_replay_pause()");
$node_primary->safe_psql('postgres',
"INSERT INTO tab_int VALUES (generate_series(41,50))");
$node_standby2->poll_query_until('postgres',
"SELECT pg_get_wal_replay_pause_state() = 'paused'")
or die "Timed out while waiting for recovery to be paused";
$node_standby2->promote;
$node_standby2->poll_query_until('postgres',
"SELECT NOT pg_is_in_recovery()")
or die "Timed out while waiting for promotion to finish";