Messaging Engine Communications attributes
The attributes display statistics for messaging engines hosted by the current application server.
The Messaging Engine Communications attributes display statistics for all the messaging engines being hosted by the current application server.
The attributes within this group are used to build the Messaging Engine Communications workspace.
- The attributes within this attribute group contain zeros for performance data if your site has set configuration value Resource Data Collection Method to On Demand (for on-demand sampling) and if you have not yet run applications that generate performance data. To report performance data in these attributes after installing and configuring the data collector, use the WebSphere® administrative console to set the appropriate PMI instrumentation level.
- The monitoring agent is set by default to provide on-demand sampling; thus the attributes within this attribute group initially contain zeros until you select the workspace and select it again later. Each time you select the workspace, these attributes are updated with the latest data.
- Attributes in this group are only provided for WebSphere Application Server Version 6 or later.
API Connections The number of sessions being used by messaging engines that are currently network connected to this application server. The valid format is a positive integer.
Buffered Reads (bytes) The number of bytes of data that have been received from the network and are held pending further processing. Large values might indicate that the application server is unable to process data fast enough to keep up with the other application server processes hosting messaging engines. The valid format is a positive integer.
Buffered Writes (bytes) The number of bytes of data being held pending transmission. Large values might indicate network congestion or application server processes hosting messaging engines which are unable to process data fast enough to keep up with the application server. The valid format is a positive integer.
Errors The communication errors that have occurred and resulted in a network connection to a messaging engine being disconnected. The valid format is a positive integer.
Instrumentation Level The instrumentation level for the Messaging Engine Communications. For WebSphere 6 or higher, the valid values are None, Basic, Extended, All, Custom. Blank if no instrumentation level is set.
Interval (sec) The length (in seconds) of the sampling interval. The valid format is a positive integer.
Message Read (bytes) The number of bytes of message data received from application server processes hosting messaging engines over network connections. This does not include data used to negotiate the transmission of messages. The valid format is a positive integer.
Message Written (bytes) The number of bytes of message data sent to application server processes hosting messaging engines over network connections. This does not include data used to negotiate the transmission of messages. The valid format is a positive integer.
Messaging Engine Attached The number of distinct application server processes hosting messaging engines currently network connected to this application server. The valid format is a positive integer.
Messaging Engine Name The name of the message engine. The value format is an alphanumeric string, with a maximum of 256 characters.
Node Name The name of the system on which the server is running. The value format is an alphanumeric string, with a maximum of 256 characters.
Origin Node The name of the server subnode. The valid format is an alphanumeric string, with a maximum of 128 characters.
Reads The number of read operations used to receive data from application server processes hosting messaging engines via network connections. The valid format is a positive integer.
Reads Blocked The number of read operations that could not be completed immediately. This number can be used as an indicator of network congestion when communicating with application server processes hosting messaging engines. The valid format is a positive integer.
Sample Date and Time The date and time the monitoring agent collected the data. The valid format is a 12-character timestamp. For the STR and SCAN functions, the format is MM/DD/YY HH:MM:SS; the following table shows the values contained in this character string.
| Character String | Meaning |
|---|---|
| MM | Month |
| DD | Day |
| YY | Year |
| HH | Hour |
| MM | Minute |
| SS | Second |
Example: 09/13/06 18:32:03 indicates the data was collected on September 13 2006, at 18:32:03.
This attribute was designed for logging and reporting data-collection times rather than for creating situations. To specify a time and date for comparison and testing, use attributes from the Universal Time or Local Time groups.
Server Name The name of the application server. The valid format is an alphanumeric string, with a maximum of 256 characters.
Summary Whether this row is a summary row of statistical totals for all messaging engine communications. Valid values are No and Yes.
Total Read (bytes) The Number of bytes of data received from application server processes hosting messaging engines. The valid format is a positive integer.
Total Written (bytes) The Number of bytes of data sent to application server processes hosting messaging engines. The valid format is a positive integer.
Writes The number of write operations used to transmit data to application server processes hosting messaging engines via network connections. The valid format is a positive integer.
Writes Blocked The number of write operations that could not be completed immediately. This number can be used as an indicator of network congestion when communicating with application server processes hosting messaging engines. The valid format is a positive integer.