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Measures reported by SapWasClusMsgTest
AS Java cluster elements communicate via cluster messages. The system is able to send messages to one cluster element, to a group of elements, or to all elements in the cluster. Cluster elements use messages to broadcast notification events. The Cluster Manager is responsible for managing this
communication. There are several types of cluster communication depending on the abilities they provide for transferring messages. The type of cluster communication that is used when processing one message is determined by the Cluster Manager and is transparent for the cluster elements. The successful message delivery is guaranteed, except in cases when the corresponding element stops or is timed out. In this case, the corresponding exception occurs and can be handled by the sending party. To figure out which cluster element had sent the maximum number of cluster messages and transferred the maximum amount of data, administrators can use the SapWasClusMsgTest test.
For each Cluster element of the SAP Java System, this test reports the total messages and broadcast messages sent. The P2P messages and requests sent from each cluster element is also monitored and the cluster element that is sending the maximum number of such messages and requests are identified. The data transferred from each cluster element is monitored periodically and the cluster element that is transferring the maximum amount of data is identified.
Outputs of the test : One set of results for each cluster element of the SAP JAVA System being monitored.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Total_Messages |
Indicates the total messages sent by this cluster element during the last measurement period. |
Number |
Comparing the value of this measure across the cluster elements will reveal the cluster element that was sending the maximum amount of total messages. |
| Data_Transferred |
Indicates the rate at which data was transferred from this cluster element during the last measurement
period. |
KB/min |
Compare the value of this measure across the cluster elements to figure out the cluster element that had transferred the maximum amount of data. |
| Average_message |
Indicates the average length of messages sent by this cluster element during the last measurement period. |
KB |
Use the detailed diagnosis of this measure to identify services performing large data transfers and downloads. |
| Message_rate |
Indicates the rate at which messages were sent by this cluster element during the last measurement
period. |
Messages/min |
|
| P2P_messages |
Indicates the rate at which messages were sent from this cluster element to another during the last
measurement period. |
Messages/min |
|
| P2P_requests |
Indicates the rate at which message requests were sent from this cluster element to another during the last measurement period. |
Messages/min |
|
| P2P_replies |
Indicates the rate of responses received by this cluster element from another cluster element during the last measurement period. |
Messages/min |
|
| Broadcast_messages |
Indicates the rate at which messages were broadcasted from this cluster element to another cluster element during the last measurement period. |
Messages/min |
Broadcast messages and requests should be used appropriately as they have significant impact on overall cluster communication including critical P2P cluster communication traffic. |
| Broadcast_requests |
Indicates the rate at which requests were broadcasted from this cluster element to another cluster element during the last measurement period. |
Messages/min |
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