JaCoLine - Viewing Historical Command Line #13177

Analysis Date	JDK	Operating System	CPU Architecture	Debug JVM?
2025-12-11	OpenJDK8	Linux	x86	N

Results

Switches Identified

-XX:MaxGCPauseMillis=15000

-XX:GCTimeRatio=99

-XX:+UseAdaptiveSizePolicy

-XX:MaxNewSize=14g

-XX:-UsePSAdaptiveSurvivorSizePolicy

-XX:SurvivorRatio=7

-XX:TargetSurvivorRatio=90

-XX:InitialTenuringThreshold=8

-XX:MaxTenuringThreshold=15

-XX:SoftRefLRUPolicyMSPerMB=200

-XX:+UseCompressedOops

-XX:+UseStringDeduplication

Switch Analysis

Name	Type	Description	Default Value	Your Value
ms	<size>	set initial Java heap size		48g
Analysis	OK

Name	Type	Description	Default Value	Your Value
mx	<size>	set maximum Java heap size		48g
Analysis	OK

Name	Type	Description	Default Value	Your Value
MaxGCPauseMillis	int	Adaptive size policy maximum GC pause time goal in millisecond, or (G1 Only) the maximum GC time per MMU time slice	max_uintx	15000
Analysis	OK

Name	Type	Description	Default Value	Your Value
GCTimeRatio	int	Adaptive size policy application time to GC time ratio	99	99
Analysis	OK

Name	Type	Description	Default Value	Your Value
UseAdaptiveSizePolicy	boolean	Use adaptive generation sizing policies	true	true
Analysis	OK

Name	Type	Description	Default Value	Your Value
NewSize	int	Initial new generation size (in bytes)	ScaleForWordSize(1*M)	6g
Analysis	OK

Name	Type	Description	Default Value	Your Value
MaxNewSize	int	Maximum new generation size (in bytes), max_uintx means set ergonomically	max_uintx	14g
Analysis	OK

Name	Type	Description	Default Value	Your Value
UsePSAdaptiveSurvivorSizePolicy	boolean	Use adaptive survivor sizing policies	true	false
Analysis	This switch will be removed in the future. It will be Obsoleted in OpenJDK26. Expired in OpenJDK27.

Name	Type	Description	Default Value	Your Value
SurvivorRatio	int	Ratio of eden/survivor space size	8	7
Analysis	OK

Name	Type	Description	Default Value	Your Value
TargetSurvivorRatio	int	Desired percentage of survivor space used after scavenge	50	90
Analysis	OK

Name	Type	Description	Default Value	Your Value
InitialTenuringThreshold	int	Initial value for tenuring threshold	7	8
Analysis	OK

Name	Type	Description	Default Value	Your Value
MaxTenuringThreshold	int	Maximum value for tenuring threshold	15	15
Analysis	OK

Name	Type	Description	Default Value	Your Value
SoftRefLRUPolicyMSPerMB	int	Number of milliseconds per MB of free space in the heap	1000	200
Analysis	OK

Name	Type	Description	Default Value	Your Value
UseCompressedOops	boolean	Use 32-bit object references in 64-bit VM. lp64_product means flag is always constant in 32 bit VM	false	true
Analysis	OK

Name	Type	Description	Default Value	Your Value
UseStringDeduplication	boolean	Use string deduplication	false	true
Analysis	OK