Update README.md

README.md

@@ -6,7 +6,7 @@ Parameter | Description | Default
 --------- | ----------- | -------
 `global.prometheus.enabled` | If true, use an existing Prometheus install. More info [here](http://docs.kubecost.com/custom-prom). | `false`
 `prometheus.server.persistentVolume.size` | Prometheus server data Persistent Volume size. Default set to retain ~6000 samples per second for 15 days. | `32Gi`
-`storage.tsdb.retention.time` | Determines when to remove old data. | `15d`
+`prometheus.server.retention` | Determines when to remove old data. | `15d`
 `prometheus.server.resources.limits.memory` | Set a memory limit on Prometheus server container. | `not set`
 `prometheus.server.resources.limits.cpu` | Set a CPU limit on Prometheus server container. | `not set`
 `prometheus.nodeExporter.enabled` `prometheus.serviceAccounts.nodeExporter.create` | If false, do not crate NodeExporter daemonset.  | `true`