JaCoLine - Viewing Historical Command Line #12669

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Analysis Date JDK Operating System CPU Architecture Debug JVM?
2025-05-27 OpenJDK8 Linux x86 N
Results
Switches Identified
-XX:+AlwaysPreTouch
-XX:+DisableExplicitGC
-XX:G1NewSizePercent=25
-XX:GCLogFileSize=104857600
-XX:+HeapDumpOnOutOfMemoryError
-XX:HeapDumpPath=
-XX:InitialHeapSize=34359738368
-XX:+ManagementServer
-XX:MaxGCPauseMillis=200
-XX:MaxHeapSize=34359738368
-XX:MaxMetaspaceSize=3221225472
-XX:MetaspaceSize=1073741824
-XX:NumberOfGCLogFiles=10
-XX:+PrintAdaptiveSizePolicy
-XX:+PrintFlagsFinal
-XX:+PrintGC
-XX:+PrintGCApplicationConcurrentTime
-XX:+PrintGCApplicationStoppedTime
-XX:+PrintGCDateStamps
-XX:+PrintGCDetails
-XX:+PrintGCTimeStamps
-XX:+PrintHeapAtGC
-XX:+ReduceSignalUsage
-XX:ReservedCodeCacheSize=1073741824
-XX:+ScavengeBeforeFullGC
-XX:+UnlockExperimentalVMOptions
-XX:-UseCompressedOops
-XX:+UseFastAccessorMethods
-XX:+UseG1GC
-XX:+UseGCLogFileRotation
-XX:-UseLargePagesIndividualAllocation
-XX:+UseStringDeduplication
Switch Analysis
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
DisableExplicitGC boolean Ignore calls to System.gc() false true
Analysis OK
Name Type Description Default Value Your Value
G1NewSizePercent int Percentage (0-100) of the heap size to use as default
minimum young gen size.		 5 25
Analysis OK
Name Type Description Default Value Your Value
GCLogFileSize int GC log file size, requires UseGCLogFileRotation.
Set to 0 to only trigger rotation via jcmd		 8*K 104857600
Analysis OK
Name Type Description Default Value Your Value
HeapDumpOnOutOfMemoryError boolean Dump heap to file when java.lang.OutOfMemoryError is thrown false true
Analysis OK
Name Type Description Default Value Your Value
HeapDumpPath string When HeapDumpOnOutOfMemoryError is on, the path (filename or
directory) of the dump file (defaults to java_pid<pid>.hprof
in the working directory)		 NULL
Analysis OK
Name Type Description Default Value Your Value
InitialHeapSize int Initial heap size (in bytes); zero means use ergonomics 0 34359738368
Analysis OK
Name Type Description Default Value Your Value
ManagementServer boolean Create JMX Management Server false true
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 200
Analysis OK
Name Type Description Default Value Your Value
MaxHeapSize int Maximum heap size (in bytes) ScaleForWordSize(96*M) 34359738368
Analysis OK
Name Type Description Default Value Your Value
MaxMetaspaceSize int Maximum size of Metaspaces (in bytes) max_uintx 3221225472
Analysis OK
Name Type Description Default Value Your Value
MetaspaceSize int Initial size of Metaspaces (in bytes)
ComponentCPUDefault
c1x8612*M
c2x86ScaleForWordSize(16*M)
 1073741824
Analysis OK
Name Type Description Default Value Your Value
NumberOfGCLogFiles int Number of gclog files in rotation
(default: 0, no rotation)		 0 10
Analysis OK
Name Type Description Default Value Your Value
PrintAdaptiveSizePolicy boolean Print information about AdaptiveSizePolicy false true
Analysis OK
Name Type Description Default Value Your Value
PrintFlagsFinal boolean Print all VM flags after argument and ergonomic processing false true
Analysis OK
Name Type Description Default Value Your Value
PrintGC boolean Print message at garbage collection false true
Analysis OK
Name Type Description Default Value Your Value
PrintGCApplicationConcurrentTime boolean Print the time the application has been running false true
Analysis OK
Name Type Description Default Value Your Value
PrintGCApplicationStoppedTime boolean Print the time the application has been stopped false true
Analysis OK
Name Type Description Default Value Your Value
PrintGCDateStamps boolean Print date stamps at garbage collection false true
Analysis OK
Name Type Description Default Value Your Value
PrintGCDetails boolean Print more details at garbage collection false true
Analysis OK
Name Type Description Default Value Your Value
PrintGCTimeStamps boolean Print timestamps at garbage collection false true
Analysis OK
Name Type Description Default Value Your Value
PrintHeapAtGC boolean Print heap layout before and after each GC false true
Analysis OK
Name Type Description Default Value Your Value
ReduceSignalUsage boolean Reduce the use of OS signals in Java and/or the VM false true
Analysis OK
Name Type Description Default Value Your Value
ReservedCodeCacheSize int Reserved code cache size (in bytes) - maximum code cache size
ComponentCPUDefault
c1x8632*M
c2x8648*M
 1073741824
Analysis OK
Name Type Description Default Value Your Value
ScavengeBeforeFullGC boolean Scavenge youngest generation before each full GC,
used with UseParallelGC		 true true
Analysis This switch will be removed in the future. It will be Obsoleted in OpenJDK23. Expired in OpenJDK24.
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
UseCompressedOops boolean Use 32-bit object references in 64-bit VM.
lp64_product means flag is always constant in 32 bit VM		 false false
Analysis OK
Name Type Description Default Value Your Value
UseFastAccessorMethods boolean Use fast method entry code for accessor methods true true
Analysis OK
Name Type Description Default Value Your Value
UseG1GC boolean Use the Garbage-First garbage collector false true
Analysis OK
Name Type Description Default Value Your Value
UseGCLogFileRotation boolean Rotate gclog files (for long running applications). It requires
-Xloggc:<filename>		 false true
Analysis OK
Name Type Description Default Value Your Value
UseLargePagesIndividualAllocation boolean Allocate large pages individually for better affinity false false
Analysis OK
Name Type Description Default Value Your Value
UseStringDeduplication boolean Use string deduplication false true
Analysis OK
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