Enterprise Java Beans attributes
The attributes provide EJB performance information.
The Enterprise Java™ Beans attributes provide performance information about each Enterprise Java Bean (EJB) deployed to the application server.
These attributes provide information about bean activity and bean object pool activity. Use the Enterprise Java Beans attributes in situations to monitor performance and problems for an individual bean. The attributes within this group are used to build the Enterprise Java Beans workspace.
- The attributes within this attribute group contain zeros for performance data if your site set configuration value Resource Data Collection Method to On Demand (for on-demand sampling) and 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 then reselect it later. Each time you reselect the workspace, these attributes are updated with the latest data.
Activate Count The number of times a bean instance was activated during the interval. The valid format is a positive integer.
Activation Rate (per sec) The bean instance activations (per second) during the interval. The valid format is a decimal (formatted to 3 decimal places).
Active Method Count The average number of invocations being processed concurrently for all the methods during the interval. The valid format is a decimal (formatted to 3 decimal places). This value is an average of several values collected over an interval. The interval can be either between this time and the previous time you activated this workspace, or fixed (normally 60 seconds), depending on the configuration of the monitoring agent.
Application EJB Module Name The name of the Web Application or EJB Module. The valid format is an alphanumeric string, with a maximum of 64 characters.
Average Concurrently Live Beans The average number of live bean objects during the interval, which include objects that were instantiated but not yet destroyed. This is a load value providing data on the average level as a function of time. It is the average number of bean objects that exist in the run time, whether active or pooled. This is a measure of how many resources the home interface is consuming. The valid format is a decimal (formatted to 3 decimal places). This value is an average of several values collected over an interval. The interval can be either between this time and the previous time you activated this workspace, or fixed (normally 60 seconds), depending on the configuration of the monitoring agent.
Average Concurrently Ready Beans The average number of active beans during the interval. This is a load value providing data on the average level as a function of time. It is the average number of bean instances of the home that are in the ready state. This is a measure of how busy the server is. The valid format is a decimal (formatted to 3 decimal places). This value is an average of several values collected over an interval. The interval can be either between this time and the previous time you activated this workspace, or fixed (normally 60 seconds), depending on the configuration of the monitoring agent.
Average Objects Discarded The average number of objects that were discarded each time the bean object pool was emptied of idle objects during the interval. The valid format is a decimal (formatted to 3 decimal places).
Average Objects in Pool The average number of objects in the bean object pool during the interval. The valid format is a decimal (formatted to 3 decimal places). This value is an average of several values collected over an interval. The interval can be either between this time and the previous time you activated this workspace, or fixed (normally 60 seconds), depending on the configuration of the monitoring agent.
Bean Name The name of the Enterprise JavaBean (EJB). This name prefixes the application name and the EJB jar name. The valid format is an alphanumeric string, with a maximum of 128 characters.
Bean Type The type of bean. Valid values are Stateless, Stateful, Entity, and Message Driven.
Create Average Time (ms) The average method response time to create bean objects during the interval. The valid format is a decimal (formatted to 3 decimal places).
Create Count The number of create calls during the interval. The valid format is a positive integer.
Creation Rate (per sec) The create calls (per second) during the interval. The valid format is a decimal (formatted to 3 decimal places).
Destroy Count The average number of times bean objects were destroyed by garbage collection during the interval. The valid format is a positive integer.
Destruction Rate The rate of destructions (per second) for bean objects by the garbage collector during the interval. The valid format is a decimal (formatted to 3 decimal places).
Discard Count The number of times the returned object to the bean object pool was discarded because the bean object pool was already full during the interval. The valid format is a positive integer.
Discard Rate (per sec) The bean object pool discards (per second) during the interval. The valid format is a decimal (formatted to 3 decimal places).
Drain Count The number of times the bean object pool was found idle and an attempt was made to remove idle objects during the interval. The valid format is a positive integer.
Drain Rate (per sec) The drain rate (per second) for the bean object pool during the interval. The valid format is a decimal (formatted to 3 decimal places).
Entity Bean Load Count The number of times bean data was loaded during the interval. The valid format is a positive integer.
Entity Bean Load Rate (per sec) The bean data loads (per second) during the interval. The valid format is a decimal (formatted to 3 decimal places).
Entity Bean Store Count The number of times bean data was written to the database during the interval. The valid format is a positive integer.
Entity Bean Store Rate (per sec) The rate at which data was written (per second) to the database for the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
Find Count The number of times a retrieval call found an object available in the bean object pool during the interval. The valid format is a positive integer.
Find Rate (per sec) The bean object pool retrieve availability (per second) for the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
Get Count The number of calls that retrieved an object from the bean object pool during the interval. The valid format is a positive integer.
Get Rate (per sec) The number of times bean objects were retrieved (per second) during the interval. The valid format is a decimal (formatted to 3 decimal places).
Instantiate Count The number of times bean objects were created during the interval. The valid format is a positive integer.
Instantiation Rate (per sec) The bean objects created (per second) for the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
Instrumentation Level The instrumentation level of this enterprise bean. For WebSphere Version 6 or later, the valid values are None, Basic, Extended, All, Custom. Blank if no instrumentation level is set.
Interval (sec) The length (in seconds) of the interval. The valid format is a positive integer.
Method Average Response Time (ms) The average response time (in milliseconds) for all methods of the remote interface for this bean during the interval. The valid format is a decimal (formatted to 3 decimal places).
Method Invocation Rate (per sec) The invocations (per second) for all methods during the sampling interval. This is a load value that provides data on the average level as a function of time. This is a measure of how busy the server is. The valid format is a decimal (formatted to 3 decimal places).
Method Invocations The total number of remote interface method invocations during the interval. The valid format is a positive integer.
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.
Passivate Count The number of times a bean instance was passivated during the interval. The valid format is a positive integer.
Passivation Rate (per sec) The number of passivations (per second) during the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
Removal Rate (per sec) The remove calls (per second) for the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
Remove Average Time (ms) The average method response time to remove bean objects during the interval. The valid format is a decimal (formatted to 3 decimal places).
Remove Count The number of remove calls during the interval. The valid format is a positive integer.
Return Count The number of calls that returned an object to the bean object pool during the interval. The valid format is a positive integer.
Return Rate (per sec) The bean object pool returns (per second) for the interval since the previous sample. The valid format is a decimal (formatted to 3 decimal places).
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.
Set Instrumentation Level Type Indicates the WebSphere resource category, which is used by the agent to modify the Instrumentation Level for transaction data collection.