IBM Tivoli Composite Application Manager for Application Diagnostics, Version 7.1.0.1

Allocation Failure - J2EE attributes

The Allocation Failure - J2EE 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. Use the Allocation Failure attributes when you need 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 (supported IBM Developer Kit for Java). Format is positive integer.

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 ran for this allocation. 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 that is free after allocation failure. Format is positive integer.

Heap Status

Indicates whether the out-of-heap-space alert has been raised. Valid values are Normal, Out_of_heap_space, Heap_space_is_low, and Insufficient_space.

Interval (sec)

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

Kbytes Free at Start of GC

The number of kilobytes that were 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 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. Format is alphanumeric string, with a maximum length of 256 characters.

Objects Moved

The total objects moved during compaction available. Format is positive integer.

Origin Node

The name of the server subnode. Format is alphanumeric string, with a maximum of 128 characters.

Process ID

The process ID of the Java Virtual Machine (JVM). Format is positive integer.

Sample Date and Time

The date and time that the monitoring agent for WebLogic Server agent collected 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 were 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 application server. Format is alphanumeric string, with a maximum of 256 characters.

Time since Last Failure (ms)

The time elapsed since the last allocation failure. Format is positive integer.

Time to Complete (ms)

The time (in milliseconds) taken 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 J2EE

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