<p>I found something wrong at HPA for istio gateway.</p>
<p>Why did 10m equal 10%? Wasn't 10m 1%?</p>
<p>Kubernetes version is 1.18.5.</p>
<pre><code># kubectl get hpa --all-namespaces
NAMESPACE      NAME                   REFERENCE                         TARGETS   MINPODS   MAXPODS   REPLICAS   AGE
istio-system   istio-egressgateway    Deployment/istio-egressgateway    7%/80%    2         10        2          13d
istio-system   istio-ingressgateway   Deployment/istio-ingressgateway   10%/80%   2         10        2          21d
istio-system   istiod                 Deployment/istiod                 0%/80%    1         5         1          21d
qa2            graph                  Deployment/graph                  2%/50%    1         10        1          7h35m
qa2            member                 Deployment/member                 0%/50%    1         10        1          7h38m
</code></pre>
<pre><code># kubectl describe hpa istio-ingressgateway -n istio-system | grep &quot;resource cpu&quot;
  resource cpu on pods  (as a percentage of request):  10% (10m) / 80%

# kubectl describe hpa istio-egressgateway -n istio-system | grep &quot;resource cpu&quot;
  resource cpu on pods  (as a percentage of request):  7% (7m) / 80%

# kubectl describe hpa istiod -n istio-system | grep &quot;resource cpu&quot;
  resource cpu on pods  (as a percentage of request):  0% (3m) / 80%

# kubectl describe hpa graph -n qa2 | grep &quot;resource cpu&quot;
  resource cpu on pods  (as a percentage of request):  2% (24m) / 50%

# kubectl describe hpa member -n qa2 | grep &quot;resource cpu&quot;
  resource cpu on pods  (as a percentage of request):  1% (12m) / 50%

</code></pre>

<p>These values are not the same, and they are not directly calculated from each other.</p>
<p>The value in percents is the target average utilization (corresponding to the <code>targetAverageUtilization</code> parameter), which is relative to the requested value.</p>
<p>The value in the brackets is the target average value (<code>targetAverageValue</code>), which is not measured in percents - this is an absolute raw value for the metric.</p>
