Allocation Failure attributes
The attribute group provides information about the heap-allocation failure.
The Allocation Failure attribute group provides information about the heap-allocation failure that caused the Java™ virtual machine (JVM) 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 aworkspace.
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. The valid format is a 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. The valid format is a positive integer.
GC Cycle Count The number of garbage-collection cycles caused by this allocation failure. The valid format is a positive integer.
Heap Expanded The total number of kilobytes by which the heap expanded or contracted as a result of garbage collection. The valid format is a positive integer.
Heap Free (%) after GC The percentage of heap space that is available after garbage collection. The valid format is a 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. The valid format is a 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. The valid format is a positive integer.
Kbytes Freed by GC The number of kilobytes freed by the garbage collector for this allocation failure. The valid format is a positive integer.
Kbytes Used The number of kilobytes in the heap that were in use when this allocation failure occurred. 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.
Objects Moved The number of objects the garbage collector moved during compaction. The valid format is a positive integer.
Origin Node The name of the server subnode. The valid format is an alphanumeric string, with a maximum of 128 characters.
Process ID The unique identifier of the JVM process (the class ID of the JVM). 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.
Time since Last Failure (ms) The time (in milliseconds) since the previous allocation failure. The valid format is a positive integer.
Time to Complete (ms) The time (in milliseconds) required to complete the action that resulted from this allocation failure. The valid format is a positive integer.
Total Kbytes Freed by GC The total number of kilobytes freed by the garbage collector in response to this allocation failure. The valid format is a positive integer.