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-rw-r--r--src/test/recovery/t/027_stream_regress.pl6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/test/recovery/t/027_stream_regress.pl b/src/test/recovery/t/027_stream_regress.pl
index aa972f89584..be9799c0a46 100644
--- a/src/test/recovery/t/027_stream_regress.pl
+++ b/src/test/recovery/t/027_stream_regress.pl
@@ -16,8 +16,14 @@ if (PostgreSQL::Test::Utils::has_wal_read_bug)
# Initialize primary node
my $node_primary = PostgreSQL::Test::Cluster->new('primary');
$node_primary->init(allows_streaming => 1);
+
+# Increase some settings that Cluster->new makes too low by default.
$node_primary->adjust_conf('postgresql.conf', 'max_connections', '25');
$node_primary->append_conf('postgresql.conf', 'max_prepared_transactions = 10');
+# We'll stick with Cluster->new's small default shared_buffers, but since that
+# makes synchronized seqscans more probable, it risks changing the results of
+# some test queries. Disable synchronized seqscans to prevent that.
+$node_primary->append_conf('postgresql.conf', 'synchronize_seqscans = off');
# WAL consistency checking is resource intensive so require opt-in with the
# PG_TEST_EXTRA environment variable.