Thread Pools attributes
The attributes provide thread pool information.
The Thread Pools attribute group provides information about the data source, as well as connection statistics, for database connection pools in a WebSphere® Application Server. Use it to monitor pools activity and to spot potential throttling.
The attributes within this group are used to build the Pool Analysis and Thread Pools workspaces.
- 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 select it again later. Each time you select the workspace, these attributes are updated with the latest data.
Application ID Indicates J2EE application ID.
Average Active Threads The average number of concurrently active threads during the sampling interval. The valid format is a decimal (formatted to three 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 Free Threads The average number of free threads in the pool. The valid format is a decimal (formatted to three 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.
Instrumentation Level The instrumentation level for the thread pools. 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 sampling interval. The valid format is a positive integer.
Maximum Pool Size The configured maximum number of threads allowed in the pool. The valid format is a positive integer.
Node Name The name of the system on which the server is running. The valid format is an alphanumeric string, with a maximum of 128 characters.
Origin Node The name of the server subnode. The valid format is an alphanumeric string, with a maximum of 128 characters.
Percent of Time Pool at Max The average percentage of time that all threads were in use during the sampling interval. The valid format is a decimal (formatted to three 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.
Percent Used Bad The bad percent of pool usage by application. The valid format is a positive integer.
Percent Used Fair The fair percent of pool usage by application. The valid format is a positive integer.
Percent Used Good The good percent of pool usage by application. 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 WebSphere Application Server. The valid format is an alphanumeric string, with a maximum of 256 characters.
Set Instrumentation Level Type Indicates theWebSphere resource category, which is used by the agent to modify the Instrumentation Level for transaction data collection.
Summary of Thread Pools Whether this row is a summary row of statistical totals collected for all thread pools. The valid values are No and Yes.
Thread Creation Rate (per sec) The rate (per second) at which threads were created during the sampling interval. The valid format is a decimal (formatted to three decimal places).
Thread Destruction Rate (per sec) The rate (per second) at which threads were destroyed during the sampling interval. The valid format is a decimal (formatted to three decimal places).
Thread Pool Name The name of the thread pool. The valid format is an alphanumeric string, with a maximum of 256 characters.
Threads Created The number of threads created during the sampling interval. The valid format is a positive integer.
Threads Destroyed The number of threads destroyed during the sampling interval. The valid format is a positive integer.