Add --max-history tip and to the quickstart helm init docs (#5328)

Signed-off-by: 0verc1ocker <anton.ouzounov@gmail.com>

docs/quickstart.md

@@ -54,9 +54,11 @@ Once you have Helm ready, you can initialize the local CLI and also
 install Tiller into your Kubernetes cluster in one step:
 
 ```console
-$ helm init
+$ helm init --max-history 200
 ```
 
+**TIP:** Setting `--max-history` on helm init is recommended as configmaps and other objects in helm history can grow large in number if not purged by max limit. Without a max history set the history is kept indefinitely, leaving a large number of records for helm and tiller to maintain.
+
 This will install Tiller into the Kubernetes cluster you saw with
 `kubectl config current-context`.
 

docs/rbac.md

@@ -43,7 +43,7 @@ _Note: The cluster-admin role is created by default in a Kubernetes cluster, so
 $ kubectl create -f rbac-config.yaml
 serviceaccount "tiller" created
 clusterrolebinding "tiller" created
-$ helm init --service-account tiller
+$ helm init --service-account tiller --max-history 200
 ```
 
 ### Example: Deploy Tiller in a namespace, restricted to deploying resources only in that namespace