IBM Tivoli Composite Application Manager for Application Diagnostics, Version 22.214.171.124
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.
- 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 Tivoli Enterprise 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.
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.
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.
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.
The name of the system on which the server is running. Alphanumeric string.
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.
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.
Parent topic:Attributes for ITCAM Agent for WebSphere Applications