8. vCloud Management and Monitoring Examples : 8.1 vCenter Operations Manager : 8.1.5 vCenter Operations Manager Dashboards : 8.1.5.5. Memory Dashboard
   
8.1.5.5. Memory Dashboard
The Memory Dashboard can be used to monitor the cluster memory usage and demand. Figure 54 shows a sample dashboard that has been created using four widgets. These widgets include:
*Generic Scoreboard (Figure 55).
*Heat Map (Figure 56).
*Metric Graph (Figure 57).
*Health Status (Figure 53).
Figure 54. Cluster Memory Dashboard
 
The Generic Scoreboard widget has been configured with these metrics defined at the cluster level. The Resource cluster is used for the memory metric selections.
Table 3: Generic Scoreboard Configuration
Metric
Unit
Green Range
Yellow Range
Orange Range
Red Range
Memory Granted
KB
8000
8000–12000
12000–13000
13000
Usage
%
50
50–75
75–80
80
Usage/Usable
%
50
50–75
75–80
80
Contention
%
50
50–75
75–80
80
Swap In Rate
KBps
300
300–400
400–500
500
Swap Out Rate
KBps
5
5–10
10–20
20
 
Note: These threshold/ranges are only examples. These values should be based on the cluster design threshold values and the customer requirements.
Figure 55. Cluster Memory Scoreboard Widget
The Heat Map is configured with three metrics, created from the cluster resource, as follows:
*Swap Out Rate (KBps).
*Swap In Rate (KBps).
*Mem Swap Used (Kb).
The settings for the Heat Map widget are shown in the following table.
Metric
Value
Attribute Kinds
Memory
Tags to Filter
Cluster compute resource (select the correct cluster)
Minimum Value
(Custom setting to environment)
Maximum Value
(Custom setting to environment)
 
Figure 56. Cluster Memory Heat Map Widget
 
The Metric Graph Widget can display line graphs of historical memory statistics. This example selects the following memory metrics to be displayed over a 24-hour period. Note that the historical time can be changed to up to one year and can also indicate the DT (dynamic threshold) values.
Table 18. Cluster Memory Metric Graph Settings
Metric
Memory | Contention (%)
Memory | Guest Active (KB)
Memory | Granted (KB)
Memory | Usage (%)
 
Figure 57. Cluster Memory Metric Graph Widget