Add more information on PostgreSQL max_connections tuning

Author: crivetimihai

docs/docs/deployment/ibm-code-engine.md

@@ -305,9 +305,12 @@ Scale up at any time with:
 ```bash
 ibmcloud cdb deployment-scaling-set mcpgw-db \
     --members 3 --memory-gb 16
+
+# Update the number of maximum connections:
+ibmcloud cdb deployment-configuration YOUR_DB_CRN '{"configuration":{"max_connections":215}}'    
 ```
 
-The gateway will reconnect transparently because the host name remains stable.
+The gateway will reconnect transparently because the host name remains stable. See the [documentation for more details](https://cloud.ibm.com/docs/databases-for-postgresql?topic=databases-for-postgresql-managing-connections&locale=en#raise-connection-limit).
 
 ---
 

docs/docs/manage/tuning.md

@@ -6,7 +6,7 @@
 >
 > 1. Tune the **runtime environment** via `.env` and configure mcpgateway to use PostgreSQL and Redis.
 > 2. Adjust **Gunicorn** workers & time‑outs in `gunicorn.conf.py`.
-> 3. Right‑size **CPU/RAM** for the container or spin up more instances (with shared Redis state).
+> 3. Right‑size **CPU/RAM** for the container or spin up more instances (with shared Redis state) and change the database settings (ex: connection limits).
 > 4. Benchmark with **hey** (or your favourite load‑generator) before & after.
 
 ---
@@ -51,6 +51,8 @@ Edit the file **before** building the image, then redeploy.
 
 > Always test with **your** workload; JSON‑RPC payload size and backend model latency change the equation.
 
+To change your database connection settings, see the respective documentation for your selected database or managed service. For example, when using IBM Cloud Databases for PostgreSQL - you can [raise the maximum number of connections](https://cloud.ibm.com/docs/databases-for-postgresql?topic=databases-for-postgresql-managing-connections&locale=en#postgres-connection-limits).
+
 ---
 
 ## 4 · Performance testing

tests/hey/hey.sh

@@ -113,6 +113,7 @@ HEY_CMD=(
   -m "$METHOD"
   -T "$CONTENT_TYPE"
   -D "$PAYLOAD_FILE"
+  -t 60
 )
 
 # Append each header