diff --git a/README.md b/README.md
index 9f195db..044e72d 100644
--- a/README.md
+++ b/README.md
@@ -27,40 +27,46 @@ Web API:
 
 Prometheus query examples of key metrics to measure and alert upon:
 
-**Request Rate** - the number of requests per second by URL path
+**Request Rate** - the number of requests per second by instance
 
-```js
-sum(irate(http_requests_count{job=~".*podinfo"}[1m])) by (path)
+```
+sum(irate(http_requests_count{job=~".*podinfo"}[1m])) by (instance)
 ```
 
-**Request Errors** - the number of failed requests per second by instance
+**Request Errors** - the number of failed requests per second by URL path
 
-```js
-sum(irate(http_requests_count{job=~".*podinfo", status_code=~"5.."}[1m])) by (instance)
+```
+sum(irate(http_requests_count{job=~".*podinfo", status=~"5.."}[1m])) by (path)
 ```
 
 **Request Duration** - average duration of each request over 10 minutes
 
-```js
+```
 sum(rate(http_requests_sum{job=~".*podinfo"}[10m])) / 
 sum(rate(http_requests_count{job=~".*podinfo"}[10m]))
 ```
 
 **Request Latency** - 99th percentile request latency over 10 minutes
 
-```js
+```
 histogram_quantile(0.99, sum(rate(http_requests_bucket{job=~".*podinfo"}[10m])) by (le))
 ```
 
 **Goroutines Rate** - the number of running goroutines over 10 minutes
 
-```js
+```
 sum(irate(go_goroutines{job=~".*podinfo"}[10m]))
 ```
 
+**Memory Usage** - the average number of bytes in use by instance
+
+```
+avg(go_memstats_alloc_bytes{job=~".*podinfo"}) by (instance)
+```
+
 **GC Duration** -  average duration of GC invocations over 10 minutes
 
-```js
+```
 sum(rate(go_gc_duration_seconds_sum{job=~".*podinfo"}[10m])) / 
 sum(rate(go_gc_duration_seconds_count{job=~".*podinfo"}[10m]))
 ```