This subsection describes the functionality to output the obtained statistics as a statistics file.

The following table describes the organization of this section:

Table 3-2 Organization of this section (Statistics file output functionality)

Category	Title	Reference
Description	Information types that you can collect in statistics files	3.3.1
	Information that you can collect in statistics files	3.3.2
	Output destination and number of statistics files	3.3.3
Settings	Settings for the execution environment (J2EE server settings)	3.3.4
Operations	Output format and output contents of statistics files	3.3.5

Note:

Function-specific explanation is not available for "Implementation" and "Precautions".

The statistics file output functionality collects the statistics that are output by the functionality of the J2EE server or batch server at regular interval and outputs the statistics in a text file.

The following figure illustrates the statistics output functionality:

Figure 3-1 Types of statistics and J2EE server functionality to output the statistics

The functionality that outputs the statistics is described below. The numbering of each functionality listed below corresponds to the number in the figure.

1. JavaVM
2. Process resource
3. Stateful Session Bean^#
4. Stateless Session Bean^#
5. Message-driven Bean^#
6. DB Connector
7. JCA resource
8. Transaction service
9. Web Application^#
10. Web container^#
11. URL group^#

#

Not applicable to the batch server.

The following table describes the statistics that are output:

Table 3-3 Output statistics

Statistics			Functionality that outputs the statistics
Category	Type	Information
Server performance	Execution result information	Number of received requests#	Web Application
			URL group
		Number of responded requests#	Web Application
			URL group
		Number of sessions#	Web Application
		Number of requests exceeding the upper limit of the number of requests pending for execution#	Web container
			Web Application
			URL group
		Number of messages received#	Message-driven Bean
		Number of transactions resolved	Transaction service
		Number of transaction rollbacks	Transaction service
		Number of connection failures	JCA resource
		Number of pooled PreparedStatement	DBConnector
		Number of pooled CallableStatement	DBConnector
		Frequency of invoking the PrepareStatement method	DBConnector
		Frequency of invoking the PrepareCall method	DBConnector
		Hit frequency of PreparedStatement in the pool	DBConnector
		Hit frequency of CallableStatement in the pool	DBConnector
Server resource	Flow control resource information	Number of synchronous threads#	Web container
			Web Application
			URL group
		Number of pending requests#	Web container
			Web Application
			URL group
		Number of entire pending requests#	Web container
			Web Application
		Number of pooled instances#	Stateless Session Bean
		Number of used instances in the pool#	Stateless Session Bean
		Number of pending requests#	Stateless Session Bean
		Number of connection sessions#	Stateful Session Bean
		Number of pooled instances#	Message-driven Bean
		Number of used instances in the pool#	Message-driven Bean
		Number of pooled connections	JCA resource
		Number of used connections in the pool	JCA resource
		Number of threads waiting for connection	JCA resource
	OS resource information	JavaVM heap size	JavaVM
		Frequency of copy garbage collection	JavaVM
		Frequency of full garbage collection	JavaVM
		Number of classes loaded	JavaVM
		Number of running JavaVM threads	JavaVM
		Number of threads blocked due to monitor lock	JavaVM
		Explicit heap size	JavaVM
		Number of Explicit memory blocks in the Explicit heap area	JavaVM
		Maximum size of Explicit memory block	JavaVM
		Maximum size of Explicit memory block acquired in an HTTP session	JavaVM
		Number of Explicit memory blocks acquired in an HTTP session	JavaVM
		Explicit heap size managed by containers excluding the Explicit heap area acquired in an HTTP session	JavaVM
		Explicit heap size managed by user applications and JavaVM	JavaVM
		Number of threads	Process resource
		Number of file descriptors	Process resource

#

Not applicable to batch servers.

Organization of this section

3.3.1 Information Types that You Can Collect in Statistics Files

3.3.2 Information that You Can Collect in Statistics Files

3.3.3 Output Destination and Number of Statistics Files

3.3.4 Settings for the execution environment (J2EE server settings)

3.3.5 Output Format and Output Contents of Statistics Files