Charts and Statistics
You can monitor the performance metrics and status of your clusters, using the console.
To monitor a cluster:
-
Sign into the Hazelcast Viridian console and select your cluster.
-
Below the Cluster details section, charts are grouped into two sections:
-
Cluster metrics: Charts for both cluster and client metrics.
-
Map metrics: Charts for monitoring maps.
Charts are updated every 5 seconds. When you hover your mouse cursor onto any chart area, you can see the related value corresponding to the cursor’s location.
-
| Metrics may not represent the current state of the cluster. The displayed metrics are sometimes 5-10 seconds older than the current state of the cluster because of the latency between the cluster reporting the metrics and the charts reading and displaying them. |
Cluster Metrics
In the Cluster Metrics section, you can see the following charts.
Cluster Memory Chart
This chart shows your cluster’s memory capacity (Cluster Max Memory, the blue line) and the size of currently used memory (Cluster Used Memory, the green line). As the green line approaches the blue line, you should think about scaling out. Note that Cluster Used Memory is the total amount of memory used for both primary and backup entries.
Map Metrics
Below the Cluster Metrics, you see the Map Metrics where the charts specific to maps are displayed. You can select the map that you want to monitor from the drop down just under the Map Metrics heading.
In the Map Metrics part of the Cluster Details page, you can see the charts described in the below sections.
Map Used Memory Chart
This chart shows how many megabytes of data are being used by this map. The value is the total memory of both primary and backup entries. For example, if you have put 100 entries with 1 KB of size each and if your map’s backup count is 1, then the value of Map Used Memory should be 200 KB.
Average Latency Chart
This chart shows the average latency values (in milliseconds) for the get, put, and remove operations.
Throughput Chart
This chart shows the total number of get, put, and remove operations executed by the cluster per second.
Entry Count Chart
This chart shows the count of entries in the map. This count does not include the backup entries. So, it provides the same count as the map.size() API.