IBM Tivoli Composite Application Manager for Application Diagnostics, Version 7.1.0.1

Allocation Failure attributes

The Allocation Failure attribute group provides information about the heap-allocation failure that caused the Java Virtual Machine hosting the application server to invoke its garbage-collection routine.

You can use the Allocation Failure attributes in situations to determine the events that caused the JVM to invoke garbage collection. The attributes within this group are used to build the Allocation Failures workspace.

Allocation Failure Number

The identifier assigned to the current allocation-failure block, which is associated with a bar in the Heap Usage - History bar chart. Format is positive integer.

ASID

The identifier (decimal) assigned to the address space running this servant region.

Bytes Needed

The number of bytes needed on the heap when this allocation failure occurred. Format is positive integer.

GC Cycle Count

The number of garbage-collection cycles caused by this allocation failure. Format is positive integer.

Heap Expanded

The total number of kilobytes by which the heap expanded or contracted as a result of garbage collection. Format is positive integer.

Heap Free (%) after GC

The percentage of heap space that is available after garbage collection. Format is positive integer.

Heap Status

Whether the out-of-heap-space alert has been raised. Valid values are Normal and Out_of_heap_space.

Interval (sec)

The length (in seconds) of the sampling interval. Format is positive integer.

Kbytes Free at Start of GC

The number of kilobytes available in the heap before garbage collection began in response to this allocation failure. Format is positive integer.

Kbytes Freed by GC

The number of kilobytes freed by the garbage collector for this allocation failure. Format is positive integer.

Kbytes Used

The number of kilobytes in the heap that were in use when this allocation failure occurred. Format is positive integer.

Node Name

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

Objects Moved

The number of objects the garbage collector moved during compaction. Format is positive integer.

Origin Node

The name of the server subnode. Alphanumeric string.

Process ID

The unique identifier of the JVM process (the class ID of the JVM). Format is positive integer.

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.

Time since Last Failure (ms)

The time (in milliseconds) since the previous allocation failure. Format is positive integer.

Time to Complete (ms)

The time (in milliseconds) required to complete the action that resulted from this allocation failure. Format is positive integer.

Total Kbytes Freed by GC

The total number of kilobytes freed by the garbage collector in response to this allocation failure. Format is positive integer.

Additional information:


Parent topic:

Attributes for ITCAM Agent for WebSphere Applications