updated runner

runner/readme.md

@@ -89,9 +89,22 @@ python db_tester.py --stress-test
 You can also specify a custom number of threads:
 
 ```bash
-python db_tester.py --stress-test --threads 50
+python db_tester.py --stress-test --threads 200
 ```
 
+Example stress test results with 200 connections:
+
+```
+📊 Stress test results:
+  - Total connections: 200
+  - Successful connections: 200
+  - Failed connections: 0
+  - Duration: 1.46 seconds
+  - Connections per second: 136.80
+```
+
+These results demonstrate excellent performance with the optimized PostgreSQL configuration (4 CPUs, 16GB RAM).
+
 ### Run All Tests
 
 ```bash