tests: minor improvemnt for "merge" module

Author: gsmolk

tests/merge.py

@@ -261,7 +261,7 @@ def test_merge_compressed_and_uncompressed_backups(self):
         node.slow_start()
 
         # Fill with data
-        node.pgbench_init(scale=5)
+        node.pgbench_init(scale=10)
 
         # Do compressed FULL backup
         self.backup_node(backup_dir, "node", node, options=[
@@ -272,7 +272,7 @@ def test_merge_compressed_and_uncompressed_backups(self):
         self.assertEqual(show_backup["backup-mode"], "FULL")
 
         # Change data
-        pgbench = node.pgbench(options=['-T', '20', '-c', '2', '--no-vacuum'])
+        pgbench = node.pgbench(options=['-T', '10', '-c', '1', '--no-vacuum'])
         pgbench.wait()
 
         # Do compressed DELTA backup
@@ -281,7 +281,7 @@ def test_merge_compressed_and_uncompressed_backups(self):
             options=['--compress', '--stream'])
 
         # Change data
-        pgbench = node.pgbench(options=['-T', '20', '-c', '2', '--no-vacuum'])
+        pgbench = node.pgbench(options=['-T', '10', '-c', '1', '--no-vacuum'])
         pgbench.wait()
 
         # Do uncompressed PAGE backup