APAR status
Closed as program error.
Error description
Error Message: On AIX, Java -Xcompressedrefs -Xmx2816M unnecessarily places the heap above 4 GB. This adversely affects performance. . Stack Trace: N/A . java -Xcompressedrefs -Xmx2816M -verbose:gc -version <?xml version="1.0" ?> <verbosegc xmlns="http://www.ibm.com/j9/verbosegc" version="R26_Java626_SR4_20121024_1635_B126069_CMPRSS"> <initialized id="1" timestamp="2012-11-21T12:59:27.239"> <attribute name="gcPolicy" value="-Xgcpolicy:gencon" /> <attribute name="maxHeapSize" value="0xb0000000" /> <attribute name="initialHeapSize" value="0x400000" /> <attribute name="compressedRefs" value="true" /> <attribute name="compressedRefsDisplacement" value="0x0" /> <attribute name="compressedRefsShift" value="0x3" /> ... compressedRefsShift=0x3 indicates that the heap is places outside the range 0-4GB.
Local fix
use -Xaggressive
Problem summary
The range of usable memory addresses was restricted for compatibility with older operating system versions.
Problem conclusion
This defect will be fixed in: 6.0.1 SR5 7.0.0 SR4 . The older operating system versions are not supported in this Java version. The restriction has been removed.
Temporary fix
Comments
APAR Information
APAR number
IV34230
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
260
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2013-01-07
Closed date
2013-01-07
Last modified date
2013-01-07
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R260 PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
Document Information
Modified date:
21 February 2022