9.9 Checking the operating status of the system

To analyze the current state of the system in order to change the system configuration or environment definition, you need to verify the operating status of the system by referring to the operation information file. The operation information gathering functionality of Application Server regularly collects system operating information about the Java EE server, and then outputs this information to the operation information file. You can use this file to check and analyze information that indicates the operating status of the system.

Procedure

1. From the directory where the operation information file is output, get the files for the period to be verified.

   The default output destination directory is: installation_directory_for_Application_Server/javaee/logs/nodes/node_name/server_instance_name/statistics.

2. Check the operating information file to view the operating status of the system.

   The operation information file and items to be verified are displayed as follows. The file name includes the date and time that the file was output in the YYYYMMDDhhmm format. In addition, the numeric time zone offset from GMT (+0900 for Japan Standard Time) is set to the TZ parameter.

   • The Java VM memory extension operation information file (File name: JVMMemoryExtensionsStatistics_server_instance_name_YYYYMMDDhhmmTZ.csv)

     Item to check	Attribute name	Explanation
     ThreadBlockedCount	ThreadBlockedCount.Count	The number of threads in the block state for monitoring locks in the Java VM
     EdenUsedMemorySize	EdenUsedMemorySize.Count	The memory size of the Eden area that is currently being used
     EdenTotalMemorySize	EdenTotalMemorySize.Count	The guaranteed memory size of the Eden area that can be used
     EdenMaxMemorySize	EdenMaxMemorySize.Count	The maximum memory size of the Eden area that can be used
     SurvivorUsedMemorySize	SurvivorUsedMemorySize.Count	The memory size of the Survivor area that is currently being used
     SurvivorTotalMemorySize	SurvivorTotalMemorySize.Count	The guaranteed memory size of the Survivor area that can be used
     SurvivorMaxMemorySize	SurvivorMaxMemorySize.Count	The maximum memory size of the Survivor area that can be used
     TenuredUsedMemorySize	TenuredUsedMemorySize.Count	The memory size of the Tenured area that is currently being used
     TenuredTotalMemorySize	TenuredTotalMemorySize.Count	The guaranteed memory size of the Tenured area that can be used
     TenuredMaxMemorySize	TenuredMaxMemorySize.Count	The maximum memory size of the Tenured area that can be used
     MetaspaceUsedMemorySize	MetaspaceUsedMemorySize.Count	The memory size of the Metaspace area that is currently being used
     MetaspaceTotalMemorySize	MetaspaceTotalMemorySize.Count	The guaranteed memory size of the Metaspace area that can be used
     MetaspaceMaxMemorySize	MetaspaceMaxMemorySize.Count	The maximum memory size of the Metaspace area that can be used
     ExplicitHeapSize	ExplicitHeapSize.Count	The Explicit heap size
     ExplicitMemoryBlockCount	ExplicitMemoryBlockCount.Count	The number of Explicit memory blocks in the Explicit heap area
     ExplicitMemoryBlockMaxSize	ExplicitMemoryBlockMaxSize.Count	The maximum size of the Explicit memory blocks
     HttpSessionExplicitMemoryBlockMaxSize	HttpSessionExplicitMemoryBlockMaxSize.Count	The maximum size of the Explicit memory blocks acquired in the HTTP session
     HttpSessionExplicitMemoryBlockCount	HttpSessionExplicitMemoryBlockCount.Count	The number of Explicit memory blocks acquired in the HTTP session
     ContainerExplicitHeapSize	ContainerExplicitHeapSize.Count	The Explicit heap size managed by the container, excluding the Explicit heap area acquired in the HTTP session
     ApplicationExplicitHeapSize	ApplicationExplicitHeapSize.Count	The Explicit heap size managed by applications and the Java VM

   • Network connection queue statistics file (file name: NetworkConnectionQueueStatistics_server_instance_name_YYYYMMDDhhmmTZ.csv)

     Item to check	Attribute name	Explanation
     CountOverflows	CountOverflows.Count	The cumulative total number of excessive connections that the connection queue could not contain
     ExCountQueued	n/a	The number of connections in the queue
     	ExCountQueued.Current	The current value of the connection queue
     	ExCountQueued.HighWaterMark	The maximum number of connections that were stored in the connection queue after statistics were initialized until statistics were collected
     	ExCountQueued.LowWaterMark	The minimum number of connections that were stored in the connection queue after statistics were initialized until statistics were collected

     (Legend) n/a: Not applicable

   • Network thread pool statistics file (file name: NetworkThreadPoolStatistics_server_instance_name_YYYYMMDDhhmmTZ.csv)

     Item to check	Attribute name	Explanation
     ExCurrentThreadsBusy	n/a	The number of request-processing threads used in the listener thread pool that processes requests
     	ExCurrentThreadsBusy.Current	The current value of the thread being executed
     	ExCurrentThreadsBusy.HighWaterMark	The maximum number of threads that were concurrently executed after statistics were initialized until statistics were collected
     	ExCurrentThreadsBusy.LowWaterMark	The minimum number of threads that were concurrently executed after statistics were initialized until statistics were collected

     (Legend) n/a: Not applicable

   • Web session statistics file (file name: WebSessionStatistics_server_instance_name_YYYYMMDDhhmmTZ.csv)

     Item to check	Attribute name	Explanation
     ActiveSessions	n/a	The number of active sessions
     	ActiveSessions.Current	The current number of sessions
     	ActiveSessions.HighWaterMark	The maximum number of sessions that existed after statistics were initialized until statistics were collected
     	ActiveSessions.LowWaterMark	The minimum number of sessions that existed after statistics were initialized until statistics were collected

     (Legend) n/a: Not applicable

   • JDBC connection pool statistics file (file name: JDBCConnectionPoolStatistics_server_instance_name_YYYYMMDDhhmmTZ.csv)

     Item to check	Attribute name	Explanation
     NumConnUsed	n/a	The total number of connections being used
     	NumConnUsed.Current	The current value of the connection being used
     	NumConnUsed.HighWaterMark	The maximum number of connections that were used in the pool after statistics were initialized until statistics were collected
     	NumConnUsed.LowWaterMark	The minimum number of connections that were used in the pool after statistics were initialized until statistics were collected
     NumConnFree	n/a	The total number of connections in the pool when the sampling was last performed
     	NumConnUsed.Current	The current value of the unused connection
     	NumConnUsed.HighWaterMark	The maximum number of connections that were unused in the pool after statistics were initialized until statistics were collected
     	NumConnUsed.LowWaterMark	The minimum number of connections that were unused in the pool after statistics were initialized until statistics were collected

     (Legend) n/a: Not applicable

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