Update performance monitoring section: change title, remove AMD references, and add wrk and btop usage instructions

Author: geremyCohen

content/learning-paths/servers-and-cloud-computing/multiarch_nginx_on_aks/5-apply-configuration.md

@@ -1,5 +1,5 @@
 ---
-title: Apply performance configuration and monitoring tools
+title: Monitor performance with wrk and btop
 weight: 70
 
 ### FIXED, DO NOT MODIFY
@@ -8,7 +8,11 @@ layout: learningpathall
 
 ## Apply configuration updates
 
-Now that you have all your nginx deployments running across Intel, AMD, and ARM architectures, you can apply performance optimizations and install monitoring tools across all pods using the utility script.
+Now that you have all your nginx deployments running across Intel and ARM architectures, you can monitor performance across each architecture using wrk to generate load and btop to monitor system performance.
+
+{{% notice Note %}}
+This tutorial uses wrk to generate load, which is readily available on apt and brew package managers.  [wrk2](https://github.com/giltene/wrk2) is a modern fork of wrk with additional features.  wrk was chosen for this tutorial due to its ease of install, but if you prefer to install and use wrk2 (or other http load generators) for your testing, feel free to do so.
+{{% /notice %}}
 
 ### Apply performance configuration
 
@@ -21,12 +25,12 @@ The `nginx_util.sh` script includes a `put config` command that will:
 1. Run the following command to apply the configuration updates:
 
 ```bash
-./nginx_util.sh put config
+./nginx_util.sh put btop
 ```
 
 You will see output similar to the following:
 
-```output
+```outputI
 Applying custom nginx.conf to all nginx pods...
 configmap/nginx-config created
 Updating nginx-amd-deployment...
@@ -46,17 +50,6 @@ Installing btop on nginx-intel-deployment-6f5bff9667-zdrqc...
 ✅ Custom nginx.conf applied and btop installed on all pods!
 ```
 
-### Performance optimizations applied
-
-The custom nginx configuration includes several performance optimizations:
-
-- **Auto worker processes**: `worker_processes auto` scales based on CPU cores
-- **File caching**: Optimized for high I/O performance with `open_file_cache`
-- **Access logs enabled**: Logs requests for monitoring and debugging
-- **TCP optimizations**: `tcp_nopush` and `tcp_nodelay` enabled
-- **Connection management**: Optimized timeouts and 100,000 keep-alive requests
-- **Memory management**: Automatic connection cleanup for non-responding clients
-
 ### Verify configuration updates
 
 2. Check that all pods have restarted with the new configuration:
@@ -67,32 +60,28 @@ kubectl get pods -n nginx
 
 You should see all pods with recent restart times.
 
-3. Verify the custom nginx configuration is applied by checking one pod:
-
-```bash
-kubectl exec -n nginx $(kubectl get pods -l arch=intel -n nginx -o name | sed 's/pod\///') -- grep "worker_processes auto" /etc/nginx/nginx.conf
-```
 
-You should see:
-```output
-worker_processes auto;
-```
-
-4. Verify btop is installed and available:
+4. Verify btop is installed and available on both Arm and Intel pods:
 
 ```bash
 kubectl exec -n nginx $(kubectl get pods -l arch=intel -n nginx -o name | sed 's/pod\///') -- btop --version
+kubectl exec -n nginx $(kubectl get pods -l arch=arm -n nginx -o name | sed 's/pod\///') -- btop --version
 ```
 
-You should see the btop version information.
+You should see btop version information for both pods.
+
+{{% notice Note %}}
+Because pods are ephemeral, btop will need to be reinstalled if the pods are deleted or restarted in the future.  If you get an error saying btop is not found, simply rerun the `./nginx_util.sh put btop` command to reinstall it.
+{{% /notice %}}
+
 
 ### Monitor pod performance
 
 5. You can now login to any pod and use btop to monitor system performance:
 
 ```bash
 # Login to AMD pod (replace with intel or arm as needed)
-./nginx_util.sh login amd
+./nginx_util.sh login arm
 ```
 
 Once inside the pod, run btop to see real-time system monitoring:
@@ -101,19 +90,16 @@ Once inside the pod, run btop to see real-time system monitoring:
 btop
 ```
 
-Press `q` to quit btop when finished.
-
-### Test services still work
-
-6. Verify that all services are still responding correctly after the configuration update:
+With btop open on the remote pod, from your local machine, run wrk against the pod to generate load.  The nginx_util.sh script includes a wrk wrapper command that makes it easy to use the wrk utility to load test an endpoint:
 
 ```bash
-./nginx_util.sh get intel
-./nginx_util.sh get amd
-./nginx_util.sh get arm
-./nginx_util.sh get multiarch
+./nginx_util.sh wrk arm
 ```
 
-All services should return the nginx welcome page, confirming that the performance optimizations are working correctly.
+
+Press `q` to quit btop when finished.
+
+### Test services still work
+
 
 You have successfully applied performance optimizations and monitoring tools to your multi-architecture nginx cluster!

content/learning-paths/servers-and-cloud-computing/multiarch_nginx_on_aks/_index.md

@@ -15,7 +15,7 @@ learning_objectives:
 
 prerequisites:
     - An [Azure account](https://azure.microsoft.com/en-us/free/).
-    - A local machine with [jq](https://jqlang.org/download/), [curl](https://curl.se/download.html), [Azure CLI](/install-guides/azure-cli/) and [kubectl](/install-guides/kubectl/) installed.
+    - A local machine with [jq](https://jqlang.org/download/), [curl](https://curl.se/download.html), [wrk](https://github.com/wg/wrk), [Azure CLI](/install-guides/azure-cli/) and [kubectl](/install-guides/kubectl/) installed.
 
 author:
     - Geremy Cohen