JaCoLine - Viewing Historical Command Line #13385

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Analysis Date JDK Operating System CPU Architecture Debug JVM?
2026-08-06 OpenJDK25 Linux x86 N
Results
Switches Identified
-XX:+UnlockExperimentalVMOptions
-XX:+UseShenandoahGC
-XX:-ShenandoahUncommit
-XX:+AlwaysPreTouch
-XX:-OmitStackTraceInFastThrow
-XX:+UseCompactObjectHeaders
-XX:+UseStringDeduplication
-XX:+UseSIMDForMemoryOps
-XX:+AvoidUnalignedAccesses
-XX:+AlwaysActAsServerClassMachine
-XX:+AlignVector
-XX:FlightRecorderOptions=stackdepth=512
-Xms8192m
-Xmx8192m
Switch Analysis
Name Type Description Default Value Your Value
UnlockExperimentalVMOptions boolean Enable normal processing of flags relating to experimental
features		 false true
Analysis OK
Name Type Description Default Value Your Value
UseShenandoahGC boolean Use the Shenandoah garbage collector false true
Analysis OK
Name Type Description Default Value Your Value
ShenandoahUncommit boolean Allow to uncommit memory under unused regions and metadata.
This optimizes footprint at expense of allocation latency in
regions that require committing back. Uncommits would be
disabled by some heuristics, or with static heap size.		 true false
Analysis OK
Name Type Description Default Value Your Value
AlwaysPreTouch boolean Force all freshly committed pages to be pre-touched false true
Analysis OK
Name Type Description Default Value Your Value
OmitStackTraceInFastThrow boolean Omit backtraces for some 'hot' exceptions in optimized code true false
Analysis OK
Name Type Description Default Value Your Value
UseCompactObjectHeaders boolean Use compact 64-bit object headers in 64-bit VM false true
Analysis OK
Name Type Description Default Value Your Value
UseStringDeduplication boolean Use string deduplication false true
Analysis OK
Name Type Description Default Value Your Value
UseSIMDForMemoryOps boolean Use SIMD instructions in generated memory move code true
Analysis OK
Name Type Description Default Value Your Value
AvoidUnalignedAccesses boolean Avoid generating unaligned memory accesses true
Analysis OK
Name Type Description Default Value Your Value
AlwaysActAsServerClassMachine boolean Always act like a server-class machine false true
Analysis This switch will be removed in the future. It will be Deprecated in OpenJDK26. Obsoleted in OpenJDK27. Expired in OpenJDK28.
Name Type Description Default Value Your Value
AlignVector boolean Perform vector store/load alignment in loop true true
Analysis OK
Name Type Description Default Value Your Value
FlightRecorderOptions string Flight Recorder options nullptr stackdepth=512
Analysis OK
Name Type Description Default Value Your Value
ms <size> set minimum and initial Java heap size 8192m
Analysis OK
Name Type Description Default Value Your Value
mx <size> set maximum Java heap size 8192m
Analysis OK
Created by Chris Newland (@chriswhocodes)  |  Data from VM Options Explorer  |  Built with Eclipse Jersey and PostgreSQL