diff --git a/control_plane/src/compute.rs b/control_plane/src/compute.rs
index f520642175..200dcd02e6 100644
--- a/control_plane/src/compute.rs
+++ b/control_plane/src/compute.rs
@@ -324,7 +324,6 @@ impl PostgresNode {
                  max_connections = 100\n\
                  wal_sender_timeout = 0\n\
                  wal_level = replica\n\
-				 zenith.file_cache_size = 4096\n\
                  listen_addresses = '{address}'\n\
                  port = {port}\n",
                 address = self.address.ip(),
diff --git a/test_runner/batch_others/test_pgbench.py b/test_runner/batch_others/test_pgbench.py
index 567b124b60..a5423cf3d7 100644
--- a/test_runner/batch_others/test_pgbench.py
+++ b/test_runner/batch_others/test_pgbench.py
@@ -12,5 +12,5 @@ def test_pgbench(postgres: PostgresFactory, pg_bin, zenith_cli):
 
     connstr = pg.connstr()
 
-    pg_bin.run_capture(['pgbench', '-i', '-s', '100', connstr])
-    pg_bin.run_capture(['pgbench'] + '-c 10 -T 100 -N -P 1 -M prepared'.split() + [connstr])
+    pg_bin.run_capture(['pgbench', '-i', connstr])
+    pg_bin.run_capture(['pgbench'] + '-c 10 -T 5 -P 1 -M prepared'.split() + [connstr])
diff --git a/vendor/postgres b/vendor/postgres
index cc967022e8..ef039e4222 160000
--- a/vendor/postgres
+++ b/vendor/postgres
@@ -1 +1 @@
-Subproject commit cc967022e85649d4b763ba77de15ff1d15809669
+Subproject commit ef039e422200f84064621b04eaab692ae940c6ca