IBM Tivoli Composite Application Manager for Application Diagnostics, Version

Dynamic Cache attributes

The Dynamic Cache attribute group provides information about the dynamic cache.

WAS consolidates several caching activities, including servlets, Web services, and WebSphere commands, into one service called the dynamic cache. These caching activities work together to improve application performance and share many configuration parameters, which are set in an application server's dynamic cache service. The dynamic cache works within an application server Java Virtual Machine (JVM), intercepting calls to cacheable objects, for example, through a servlet's service method or a command's execute method. It either stores the object's output to, or serves the object's content from, the dynamic cache.

The attributes within this group are used to build the Cache Analysis workspace.

For information about WebSphere PMI metrics, see WebSphere PMI Attribute Mapping.

Cache Instance Name

Indicates the cache instance name.

Cache Instance Type

Indicates Cache instance type.

Current In-Memory Cache Size

The number of cache entries currently in memory. Format is positive integer.

In-Memory and Disk Timeout Rate (per sec)

The rate (per second) of total in-memory and disk timeouts for the sampling interval. Format is decimal (formatted to 3 decimal places).

In-Memory and Disk Timeouts

The total number of in-memory and disk timeouts during the sampling interval. Format is positive integer.

Instrumentation Level

The instrumentation level for the dynamic cache. 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. Format is positive integer.

Maximum In-Memory Cache Size

The maximum number of cache entries in memory. Format is positive integer.

Node Name

The name of the system on which the server is running. Alphanumeric string.

Origin Node

The name of the server subnode. Alphanumeric string. Maximum 128 characters.

Sample Date and Time

The date and time the Tivoli Enterprise Management 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:

Format of the 12-character timestamp

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. Alphanumeric string.

Set Instrumentation Level


Indicates the WebSphere resource category, which is used by the agent to modify the Instrumentation Level for transaction data collection.

Summary of Cache

Indicates that this row is a summary row of statistical totals collected for all the cache object types.

Additional information:

Parent topic:

Attributes for ITCAM Agent for WebSphere Applications