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      Command-line options
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      Specifying options
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      Standard options
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      Switching to OpenJ9
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      -Dcom.ibm.enableLegacyLogSecurity
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  <li class="md-nav__item">
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      -Dcom.ibm.tools.attach.directory
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    <a href="../dcomibmtoolsattachdisplayname/" title="-Dcom.ibm.tools.attach.displayName" class="md-nav__link">
      -Dcom.ibm.tools.attach.displayName
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  <li class="md-nav__item">
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      -Dcom.ibm.tools.attach.enable
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  <li class="md-nav__item">
    <a href="../dcomibmtoolsattachid/" title="-Dcom.ibm.tools.attach.id" class="md-nav__link">
      -Dcom.ibm.tools.attach.id
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  <li class="md-nav__item">
    <a href="../dcomibmtoolsattachlogging/" title="-Dcom.ibm.tools.attach.logging" class="md-nav__link">
      -Dcom.ibm.tools.attach.logging
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    <a href="../dcomibmtoolsattachlogname/" title="-Dcom.ibm.tools.attach.log.name" class="md-nav__link">
      -Dcom.ibm.tools.attach.log.name
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    <a href="../dcomibmtoolsattachtimeout/" title="-Dcom.ibm.tools.attach.timeout" class="md-nav__link">
      -Dcom.ibm.tools.attach.timeout
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  <li class="md-nav__item">
    <a href="../dfileencoding/" title="-Dfile.encoding" class="md-nav__link">
      -Dfile.encoding
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    <a href="../djavacompiler/" title="-Djava.compiler" class="md-nav__link">
      -Djava.compiler
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      -Djava.lang.string.substring.nocopy
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  <li class="md-nav__item">
    <a href="../djavalangstringbuffergrowaggressively/" title="-Djava.lang.stringBuffer.growAggressively" class="md-nav__link">
      -Djava.lang.stringBuffer.growAggressively
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  </li>

        
  <li class="md-nav__item">
    <a href="../djdknativecbc/" title="-Djdk.nativeCBC" class="md-nav__link">
      -Djdk.nativeCBC
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  <li class="md-nav__item">
    <a href="../djdknativechacha20/" title="-Djdk.nativeChaCha20" class="md-nav__link">
      -Djdk.nativeChaCha20
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../djdknativecrypto/" title="-Djdk.nativeCrypto" class="md-nav__link">
      -Djdk.nativeCrypto
    </a>
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  <li class="md-nav__item">
    <a href="../djdknativedigest/" title="-Djdk.nativeDigest" class="md-nav__link">
      -Djdk.nativeDigest
    </a>
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  <li class="md-nav__item">
    <a href="../djdknativegcm/" title="-Djdk.nativeGCM" class="md-nav__link">
      -Djdk.nativeGCM
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../djdknativersa/" title="-Djdk.nativeRSA" class="md-nav__link">
      -Djdk.nativeRSA
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  <li class="md-nav__item md-nav__item--nested">
    
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      JVM -X options
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        JVM -X options
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      Using -X options
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  <li class="md-nav__item">
    <a href="../x/" title="-X" class="md-nav__link">
      -X
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xaggressive/" title="-Xaggressive" class="md-nav__link">
      -Xaggressive
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  <li class="md-nav__item">
    <a href="../xalwaysclassgc/" title="-Xalwaysclassgc" class="md-nav__link">
      -Xalwaysclassgc
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  <li class="md-nav__item">
    <a href="../xaot/" title="-Xaot" class="md-nav__link">
      -Xaot
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  <li class="md-nav__item">
    <a href="../xargencoding/" title="-Xargencoding" class="md-nav__link">
      -Xargencoding
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    <a href="../xbootclasspath/" title="-Xbootclasspath" class="md-nav__link">
      -Xbootclasspath
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    <a href="../xceehdlr/" title="-XCEEHDLR" class="md-nav__link">
      -XCEEHDLR
    </a>
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  <li class="md-nav__item">
    <a href="../xcheck/" title="-Xcheck" class="md-nav__link">
      -Xcheck
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  <li class="md-nav__item">
    <a href="../xclassgc/" title="-Xclassgc" class="md-nav__link">
      -Xclassgc
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    <a href="../xcodecache/" title="-Xcodecache" class="md-nav__link">
      -Xcodecache
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      -Xcodecachetotal
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    <a href="../xcomp/" title="-Xcomp" class="md-nav__link">
      -Xcomp
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      -Xcompactexplicitgc
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    <a href="../xcompactgc/" title="-Xcompactgc" class="md-nav__link">
      -Xcompactgc
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      -XcompilationThreads
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    <a href="../xcompressedrefs/" title="-Xcompressedrefs" class="md-nav__link">
      -Xcompressedrefs
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    <a href="../xconcurrentbackground/" title="-Xconcurrentbackground" class="md-nav__link">
      -Xconcurrentbackground
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    <a href="../xconcurrentlevel/" title="-Xconcurrentlevel" class="md-nav__link">
      -Xconcurrentlevel
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    <a href="../xconcurrentslack/" title="-Xconcurrentslack" class="md-nav__link">
      -Xconcurrentslack
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  <li class="md-nav__item">
    <a href="../xconmeter/" title="-Xconmeter" class="md-nav__link">
      -Xconmeter
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    <a href="../xenableexcessivegc/" title="-Xdisableexcessivegc" class="md-nav__link">
      -Xdisableexcessivegc
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  <li class="md-nav__item">
    <a href="../xenableexplicitgc/" title="-Xdisableexplicitgc" class="md-nav__link">
      -Xdisableexplicitgc
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  <li class="md-nav__item">
    <a href="../xdisablejavadump/" title="-Xdisablejavadump" class="md-nav__link">
      -Xdisablejavadump
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  <li class="md-nav__item">
    <a href="../xenablestringconstantgc/" title="-Xdisablestringconstantgc" class="md-nav__link">
      -Xdisablestringconstantgc
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  <li class="md-nav__item">
    <a href="../xdump/" title="-Xdump" class="md-nav__link">
      -Xdump
    </a>
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  <li class="md-nav__item">
    <a href="../xenableexcessivegc/" title="-Xenableexcessivegc" class="md-nav__link">
      -Xenableexcessivegc
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  <li class="md-nav__item">
    <a href="../xenableexplicitgc/" title="-Xenableexplicitgc" class="md-nav__link">
      -Xenableexplicitgc
    </a>
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  <li class="md-nav__item">
    <a href="../xenablestringconstantgc/" title="-Xenablestringconstantgc" class="md-nav__link">
      -Xenablestringconstantgc
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    <a href="../xfastresolve/" title="-Xfastresolve" class="md-nav__link">
      -Xfastresolve
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    <a href="../xfuture/" title="-Xfuture" class="md-nav__link">
      -Xfuture
    </a>
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  <li class="md-nav__item">
    <a href="../xgc/" title="-Xgc" class="md-nav__link">
      -Xgc
    </a>
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  <li class="md-nav__item">
    <a href="../xgcsplitheap/" title="-Xgc:splitheap" class="md-nav__link">
      -Xgc:splitheap
    </a>
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  <li class="md-nav__item">
    <a href="../xgcpolicy/" title="-Xgcpolicy" class="md-nav__link">
      -Xgcpolicy
    </a>
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  <li class="md-nav__item">
    <a href="../xgcthreads/" title="-Xgcthreads" class="md-nav__link">
      -Xgcthreads
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  <li class="md-nav__item">
    <a href="../xgcworkpackets/" title="-Xgcworkpackets" class="md-nav__link">
      -Xgcworkpackets
    </a>
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  <li class="md-nav__item">
    <a href="../xint/" title="-Xint" class="md-nav__link">
      -Xint
    </a>
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  <li class="md-nav__item">
    <a href="../xss/" title="-Xiss" class="md-nav__link">
      -Xiss
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    <a href="../xjit/" title="-Xjit" class="md-nav__link">
      -Xjit
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    <a href="../xjni/" title="-Xjni" class="md-nav__link">
      -Xjni
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  <li class="md-nav__item">
    <a href="../xlinenumbers/" title="-Xlinenumbers" class="md-nav__link">
      -Xlinenumbers
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  <li class="md-nav__item">
    <a href="../xloa/" title="-Xloa" class="md-nav__link">
      -Xloa
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    <a href="../xloaminimum/" title="-Xloainitial" class="md-nav__link">
      -Xloainitial
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  <li class="md-nav__item">
    <a href="../xloaminimum/" title="-Xloamaximum" class="md-nav__link">
      -Xloamaximum
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  <li class="md-nav__item">
    <a href="../xloaminimum/" title="-Xloaminimum" class="md-nav__link">
      -Xloaminimum
    </a>
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  <li class="md-nav__item">
    <a href="../xlockreservation/" title="-XlockReservation" class="md-nav__link">
      -XlockReservation
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    <a href="../xlockword/" title="-Xlockword" class="md-nav__link">
      -Xlockword
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  <li class="md-nav__item">
    <a href="../xlog/" title="-Xlog" class="md-nav__link">
      -Xlog
    </a>
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  <li class="md-nav__item">
    <a href="../xlp/" title="-Xlp" class="md-nav__link">
      -Xlp
    </a>
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  <li class="md-nav__item">
    <a href="../xlpcodecache/" title="-Xlp:codecache" class="md-nav__link">
      -Xlp:codecache
    </a>
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  <li class="md-nav__item">
    <a href="../xlpobjectheap/" title="-Xlp:objectheap" class="md-nav__link">
      -Xlp:objectheap
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  <li class="md-nav__item">
    <a href="../xmine/" title="-Xmaxe" class="md-nav__link">
      -Xmaxe
    </a>
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  <li class="md-nav__item">
    <a href="../xminf/" title="-Xmaxf" class="md-nav__link">
      -Xmaxf
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmint/" title="-Xmaxt" class="md-nav__link">
      -Xmaxt
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmca/" title="-Xmca" class="md-nav__link">
      -Xmca
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmca/" title="-Xmco" class="md-nav__link">
      -Xmco
    </a>
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  <li class="md-nav__item">
    <a href="../xmcrs/" title="-Xmcrs" class="md-nav__link">
      -Xmcrs
    </a>
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  <li class="md-nav__item">
    <a href="../xmine/" title="-Xmine" class="md-nav__link">
      -Xmine
    </a>
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  <li class="md-nav__item">
    <a href="../xminf/" title="-Xminf" class="md-nav__link">
      -Xminf
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmint/" title="-Xmint" class="md-nav__link">
      -Xmint
    </a>
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  <li class="md-nav__item">
    <a href="../xmn/" title="-Xmn" class="md-nav__link">
      -Xmn
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmn/" title="-Xmns" class="md-nav__link">
      -Xmns
    </a>
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  <li class="md-nav__item">
    <a href="../xmn/" title="-Xmnx" class="md-nav__link">
      -Xmnx
    </a>
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  <li class="md-nav__item">
    <a href="../xmo/" title="-Xmo" class="md-nav__link">
      -Xmo
    </a>
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  <li class="md-nav__item">
    <a href="../xmo/" title="-Xmoi" class="md-nav__link">
      -Xmoi
    </a>
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  <li class="md-nav__item">
    <a href="../xmo/" title="-Xmos" class="md-nav__link">
      -Xmos
    </a>
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  <li class="md-nav__item">
    <a href="../xmo/" title="-Xmox" class="md-nav__link">
      -Xmox
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmr/" title="-Xmr" class="md-nav__link">
      -Xmr
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmr/" title="-Xmrx" class="md-nav__link">
      -Xmrx
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xms/" title="-Xms" class="md-nav__link">
      -Xms
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xmso/" title="-Xmso" class="md-nav__link">
      -Xmso
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xms/" title="-Xmx" class="md-nav__link">
      -Xmx
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xaot/" title="-Xnoaot" class="md-nav__link">
      -Xnoaot
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xclassgc/" title="-Xnoclassgc" class="md-nav__link">
      -Xnoclassgc
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xcompactexplicitgc/" title="-Xnocompactexplicitgc" class="md-nav__link">
      -Xnocompactexplicitgc
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xcompactgc/" title="-Xnocompactgc" class="md-nav__link">
      -Xnocompactgc
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xcompressedrefs/" title="-Xnocompressedrefs" class="md-nav__link">
      -Xnocompressedrefs
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xjit/" title="-Xnojit" class="md-nav__link">
      -Xnojit
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xlinenumbers/" title="-Xnolinenumbers" class="md-nav__link">
      -Xnolinenumbers
    </a>
  </li>

        
  <li class="md-nav__item">
    <a href="../xloa/" title="-Xnoloa" class="md-nav__link">
      -Xnoloa
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    <a href="../xsigcatch/" title="-Xnosigcatch" class="md-nav__link">
      -Xnosigcatch
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      -Xnosigchain
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      -Xnuma:none
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      -XX:[+|-]HeapManagementMXBeanCompatibility
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  <li class="md-nav__item">
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      -XX:IdleTuningMinIdleWaitTime
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      -XX:[+|-]IgnoreUnrecognizedVMOptions
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      -XX:[+|-]IgnoreUnrecognizedXXColonOptions
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      -XX:InitialRAMPercentage
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      -XX:InitialHeapSize
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      -XX:[+|-]LazySymbolResolution
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      -XX:[+|-]LegacyXLogOption
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      -XX:MaxDirectMemorySize
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      -XX:MaxHeapSize
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      -XX:MaxRAMPercentage
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      -XX:OnOutOfMemoryError
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    <a href="../xxoriginaljdk8heapsizecompatibilitymode/" title="-XX:[+|-]OriginalJDK8HeapSizeCompatibilityMode" class="md-nav__link">
      -XX:[+|-]OriginalJDK8HeapSizeCompatibilityMode
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      -XXnosuballoc32bitmem
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      -XX:[+|-]PageAlignDirectMemory
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      -XX:ParallelCMSThreads
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      -XX:ParallelGCThreads
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      -XX:[+|-]PortableSharedCache
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  <li class="md-nav__item">
    <a href="../xxpositiveidentityhash/" title="-XX:[+|-]PositiveIdentityHash" class="md-nav__link">
      -XX:[+|-]PositiveIdentityHash
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      -XX:[+|-]PrintCodeCache
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    <a href="../xxprintflagsfinal/" title="-XX:[+|-]PrintFlagsFinal" class="md-nav__link">
      -XX:[+|-]PrintFlagsFinal
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      -XX:[+|-]ReadIPInfoForRAS
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      -XX:[+|-]ReduceCPUMonitorOverhead
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      -XX:[+|-]RuntimeInstrumentation
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      -XX:ShareClassesEnableBCI
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      -XX:-StackTraceInThrowable
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      -XX:[+|-]UseCompressedOops
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      -XX:[+|-]UseGCStartupHints
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      -XX:[+|-]VerboseVerification
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<h1 id="-dcomibmlangmanagementoperatingsystemmxbeaniscputime100ns">-Dcom.ibm.lang.management.<br>OperatingSystemMXBean.isCpuTime100ns</h1>
<p>Changes the unit of the return value of the <code>OperatingSystemMXBean.getProcessCpuTime()</code> method.</p>
<h2 id="syntax">Syntax</h2>
<pre><code>    -Dcom.ibm.lang.management.OperatingSystemMXBean.isCpuTime100ns=[true|false]
</code></pre>
<table>
<thead>
<tr>
<th>Setting</th>
<th>Effect</th>
<th align="center">Default</th>
</tr>
</thead>
<tbody>
<tr>
<td>true</td>
<td>Enable</td>
<td align="center"></td>
</tr>
<tr>
<td>false</td>
<td>Disable</td>
<td align="center"><i class="fa fa-check" aria-hidden="true"></i><span class="sr-only">yes</span></td>
</tr>
</tbody>
</table>
<h2 id="explanation">Explanation</h2>
<p>The Oracle <code>java.lang.management</code> package includes MBean categories such as <code>Memory</code>, <code>OperatingSystem</code>, and <code>GarbageCollector</code>. The OpenJ9 VM  provides additional MXBeans to extend the monitoring and management capabilities. For example, the <code>OperatingSystemMXBean</code>, which monitors operating system settings such as physical and virtual memory size, processor capacity, and processor utilization.</p>
<p>The <code>OperatingSystemMXBean.getProcessCpuTime()</code> method returns a value in nanoseconds (10<sup>-9</sup> s), for compatibility with the <code>com.sun.management.OperatingSystemMXBean</code> and <code>UnixOperatingSystemMXBean</code> interfaces.</p>
<p>In earlier VM releases, the return value was in hundreds of nanoseconds. If you want to revert to this behavior, set the <code>-Dcom.ibm.lang.management.OperatingSystemMXBean.isCpuTime100ns</code> property to <code>true</code>.</p>
<p>The default value for this property is <code>false</code>.</p>
<h2 id="see-also">See also</h2>
<ul>
<li><a href="../api-langmgmt/">Monitoring and management API documentation</a> <!-- Link to API --></li>
</ul>
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