APAR status
Closed as program error.
Error description
Error Message: Increased CPU consumed by the jvm to perform java lock-related activities in Java 8 and higher releases. A JLM profile taken on Java 8 shows an increase in the 'TIER3' column of the 'Java (Inflated) Monitors' section. Tprof logs will show a large increase in CPU usage due to the following contributors: objectMonitorEnterNonBlocking and objectMonitorEnterBlocking . Stack Trace: N/A .
Local fix
Problem summary
The performance impact is attributed to an unoptimized compare and swap operation being performed in the object monitor locking related code.
Problem conclusion
The jvm has been fixed to optimize the compare and swap operation on z platforms. . This APAR will be fixed in the following Java Releases: 8 SR3 FP10 (8.0.3.10) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV87241
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-07-25
Closed date
2016-07-25
Last modified date
2016-07-25
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
R270 PSY
UP
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Document Information
Modified date:
21 February 2022