fix: reduce pool size to 3, add server_reset_query for transaction mode

pgbouncer/configmap.yaml

@@ -16,10 +16,11 @@ data:
     auth_file = /etc/pgbouncer/userlist.txt
     pool_mode = transaction
     max_client_conn = 200
-    default_pool_size = 5
-    min_pool_size = 1
-    reserve_pool_size = 2
+    default_pool_size = 3
+    min_pool_size = 0
+    reserve_pool_size = 1
     server_tls_sslmode = require
+    server_reset_query = DISCARD ALL
     ignore_startup_parameters = extra_float_digits
     log_connections = 0
     log_disconnections = 0