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   <li class="md-nav__item">
     <a href="../tool_jmap/" title="Java memory map (jmap) tool" class="md-nav__link">
       Java memory map (jmap) tool
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../tool_jps/" title="Java process status (jps)" class="md-nav__link">
       Java process status (jps)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../tool_jstack/" title="Java stack (jstack) tool" class="md-nav__link">
       Java stack (jstack) tool
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../tool_jstat/" title="Java statistics monitoring (jstat) tool" class="md-nav__link">
       Java statistics monitoring (jstat) tool
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../tool_migration/" title="Switching to OpenJ9" class="md-nav__link">
       Switching to OpenJ9
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-toggle md-nav__toggle" data-md-toggle="nav-12-4" type="checkbox" id="nav-12-4">

     <label class="md-nav__link" for="nav-12-4">
       Interfaces
     </label>
     <nav class="md-nav" data-md-component="collapsible" data-md-level="2">
       <label class="md-nav__title" for="nav-12-4">
         Interfaces
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../interface_jvmti/" title="JVMTI" class="md-nav__link">
       JVMTI
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../interface_dtfj/" title="DTFJ" class="md-nav__link">
       DTFJ
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../interface_lang_management/" title="Language Management" class="md-nav__link">
       Language Management
     </a>
   </li>


       </ul>
     </nav>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-toggle md-nav__toggle" data-md-toggle="nav-13" type="checkbox" id="nav-13">

     <label class="md-nav__link" for="nav-13">
       Command-line options
     </label>
     <nav class="md-nav" data-md-component="collapsible" data-md-level="1">
       <label class="md-nav__title" for="nav-13">
         Command-line options
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../cmdline_specifying/" title="Specifying options" class="md-nav__link">
       Specifying options
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../cmdline_general/" title="Standard options" class="md-nav__link">
       Standard options
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../cmdline_migration/" title="Switching to OpenJ9" class="md-nav__link">
       Switching to OpenJ9
     </a>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-toggle md-nav__toggle" data-md-toggle="nav-13-4" type="checkbox" id="nav-13-4">

     <label class="md-nav__link" for="nav-13-4">
       System property options
     </label>
     <nav class="md-nav" data-md-component="collapsible" data-md-level="2">
       <label class="md-nav__title" for="nav-13-4">
         System property options
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../d_jvm_commands/" title="Using System properties" class="md-nav__link">
       Using System properties
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmenableclasscaching/" title="-Dcom.ibm.enableClassCaching" class="md-nav__link">
       -Dcom.ibm.enableClassCaching
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmenablelegacydumpsecurity/" title="-Dcom.ibm.enableLegacyDumpSecurity" class="md-nav__link">
       -Dcom.ibm.enableLegacyDumpSecurity
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmenablelegacylogsecurity/" title="-Dcom.ibm.enableLegacyLogSecurity" class="md-nav__link">
       -Dcom.ibm.enableLegacyLogSecurity
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmenablelegacytracesecurity/" title="-Dcom.ibm.enableLegacyTraceSecurity" class="md-nav__link">
       -Dcom.ibm.enableLegacyTraceSecurity
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmgpudisable/" title="-Dcom.ibm.gpu.disable" class="md-nav__link">
       -Dcom.ibm.gpu.disable
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmgpuenable/" title="-Dcom.ibm.gpu.enable" class="md-nav__link">
       -Dcom.ibm.gpu.enable
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmgpuverbose/" title="-Dcom.ibm.gpu.verbose" class="md-nav__link">
       -Dcom.ibm.gpu.verbose
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmlangmanagementosmxbeaniscputime100ns/" title="-Dcom.ibm.lang.management.OperatingSystemMXBean.isCpuTime100ns" class="md-nav__link">
       -Dcom.ibm.lang.management.OperatingSystemMXBean.isCpuTime100ns
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmlangmanagementverbose/" title="-Dcom.ibm.lang.management.verbose" class="md-nav__link">
       -Dcom.ibm.lang.management.verbose
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachcommand_timeout/" title="-Dcom.ibm.tools.attach.command_timeout" class="md-nav__link">
       -Dcom.ibm.tools.attach.command_timeout
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachdirectory/" title="-Dcom.ibm.tools.attach.directory" class="md-nav__link">
       -Dcom.ibm.tools.attach.directory
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachdisplayname/" title="-Dcom.ibm.tools.attach.displayName" class="md-nav__link">
       -Dcom.ibm.tools.attach.displayName
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachenable/" title="-Dcom.ibm.tools.attach.enable" class="md-nav__link">
       -Dcom.ibm.tools.attach.enable
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachid/" title="-Dcom.ibm.tools.attach.id" class="md-nav__link">
       -Dcom.ibm.tools.attach.id
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachlogging/" title="-Dcom.ibm.tools.attach.logging" class="md-nav__link">
       -Dcom.ibm.tools.attach.logging
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachlogname/" title="-Dcom.ibm.tools.attach.log.name" class="md-nav__link">
       -Dcom.ibm.tools.attach.log.name
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachshutdown_timeout/" title="-Dcom.ibm.tools.attach.shutdown_timeout" class="md-nav__link">
       -Dcom.ibm.tools.attach.shutdown_timeout
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dcomibmtoolsattachtimeout/" title="-Dcom.ibm.tools.attach.timeout" class="md-nav__link">
       -Dcom.ibm.tools.attach.timeout
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../dfileencoding/" title="-Dfile.encoding" class="md-nav__link">
       -Dfile.encoding
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../djavacompiler/" title="-Djava.compiler" class="md-nav__link">
       -Djava.compiler
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../djavalangstringsubstringnocopy/" title="-Djava.lang.string.substring.nocopy" class="md-nav__link">
       -Djava.lang.string.substring.nocopy
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../djavalangstringbuffergrowaggressively/" title="-Djava.lang.stringBuffer.growAggressively" class="md-nav__link">
       -Djava.lang.stringBuffer.growAggressively
     </a>
   </li>


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


   <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>
   </li>


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


   <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
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-toggle md-nav__toggle" data-md-toggle="nav-13-5" type="checkbox" id="nav-13-5">

     <label class="md-nav__link" for="nav-13-5">
       JVM -X options
     </label>
     <nav class="md-nav" data-md-component="collapsible" data-md-level="2">
       <label class="md-nav__title" for="nav-13-5">
         JVM -X options
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../x_jvm_commands/" title="Using -X options" class="md-nav__link">
       Using -X options
     </a>
   </li>


   <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
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xalwaysclassgc/" title="-Xalwaysclassgc" class="md-nav__link">
       -Xalwaysclassgc
     </a>
   </li>


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


   <li class="md-nav__item">
     <a href="../xargencoding/" title="-Xargencoding" class="md-nav__link">
       -Xargencoding
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xbootclasspath/" title="-Xbootclasspath" class="md-nav__link">
       -Xbootclasspath
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xceehdlr/" title="-XCEEHDLR" class="md-nav__link">
       -XCEEHDLR
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xcheck/" title="-Xcheck" class="md-nav__link">
       -Xcheck
     </a>
   </li>


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


   <li class="md-nav__item">
     <a href="../xcodecache/" title="-Xcodecache" class="md-nav__link">
       -Xcodecache
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xcodecachetotal/" title="-Xcodecachetotal" class="md-nav__link">
       -Xcodecachetotal
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xcomp/" title="-Xcomp" class="md-nav__link">
       -Xcomp
     </a>
   </li>


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


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


   <li class="md-nav__item">
     <a href="../xcompilationthreads/" title="-XcompilationThreads" class="md-nav__link">
       -XcompilationThreads
     </a>
   </li>


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


   <li class="md-nav__item">
     <a href="../xconcurrentbackground/" title="-Xconcurrentbackground" class="md-nav__link">
       -Xconcurrentbackground
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xconcurrentlevel/" title="-Xconcurrentlevel" class="md-nav__link">
       -Xconcurrentlevel
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xconcurrentslack/" title="-Xconcurrentslack" class="md-nav__link">
       -Xconcurrentslack
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xconmeter/" title="-Xconmeter" class="md-nav__link">
       -Xconmeter
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenableexcessivegc/" title="-Xdisableexcessivegc" class="md-nav__link">
       -Xdisableexcessivegc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenableexplicitgc/" title="-Xdisableexplicitgc" class="md-nav__link">
       -Xdisableexplicitgc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xdisablejavadump/" title="-Xdisablejavadump" class="md-nav__link">
       -Xdisablejavadump
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenablestringconstantgc/" title="-Xdisablestringconstantgc" class="md-nav__link">
       -Xdisablestringconstantgc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xdump/" title="-Xdump" class="md-nav__link">
       -Xdump
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenableexcessivegc/" title="-Xenableexcessivegc" class="md-nav__link">
       -Xenableexcessivegc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenableexplicitgc/" title="-Xenableexplicitgc" class="md-nav__link">
       -Xenableexplicitgc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xenablestringconstantgc/" title="-Xenablestringconstantgc" class="md-nav__link">
       -Xenablestringconstantgc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xfastresolve/" title="-Xfastresolve" class="md-nav__link">
       -Xfastresolve
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xfuture/" title="-Xfuture" class="md-nav__link">
       -Xfuture
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xgc/" title="-Xgc" class="md-nav__link">
       -Xgc
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xgcsplitheap/" title="-Xgc:splitheap" class="md-nav__link">
       -Xgc:splitheap
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xgcpolicy/" title="-Xgcpolicy" class="md-nav__link">
       -Xgcpolicy
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xgcthreads/" title="-Xgcthreads" class="md-nav__link">
       -Xgcthreads
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xgcworkpackets/" title="-Xgcworkpackets" class="md-nav__link">
       -Xgcworkpackets
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xint/" title="-Xint" class="md-nav__link">
       -Xint
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xss/" title="-Xiss" class="md-nav__link">
       -Xiss
     </a>
   </li>


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


   <li class="md-nav__item">
     <a href="../xjni/" title="-Xjni" class="md-nav__link">
       -Xjni
     </a>
   </li>


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


   <li class="md-nav__item">
     <a href="../xloa/" title="-Xloa" class="md-nav__link">
       -Xloa
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xloaminimum/" title="-Xloainitial" class="md-nav__link">
       -Xloainitial
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xloaminimum/" title="-Xloamaximum" class="md-nav__link">
       -Xloamaximum
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xloaminimum/" title="-Xloaminimum" class="md-nav__link">
       -Xloaminimum
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlockreservation/" title="-XlockReservation" class="md-nav__link">
       -XlockReservation
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlockword/" title="-Xlockword" class="md-nav__link">
       -Xlockword
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlog/" title="-Xlog" class="md-nav__link">
       -Xlog
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlp/" title="-Xlp" class="md-nav__link">
       -Xlp
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlpcodecache/" title="-Xlp:codecache" class="md-nav__link">
       -Xlp:codecache
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xlpobjectheap/" title="-Xlp:objectheap" class="md-nav__link">
       -Xlp:objectheap
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xmine/" title="-Xmaxe" class="md-nav__link">
       -Xmaxe
     </a>
   </li>


   <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>
   </li>


   <li class="md-nav__item">
     <a href="../xmcrs/" title="-Xmcrs" class="md-nav__link">
       -Xmcrs
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xmine/" title="-Xmine" class="md-nav__link">
       -Xmine
     </a>
   </li>


   <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>
   </li>


   <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>
   </li>


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


   <li class="md-nav__item">
     <a href="../xmo/" title="-Xmo" class="md-nav__link">
       -Xmo
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xmo/" title="-Xmoi" class="md-nav__link">
       -Xmoi
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xmo/" title="-Xmos" class="md-nav__link">
       -Xmos
     </a>
   </li>


   <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>
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   <li class="md-nav__item">
     <a href="../xloa/" title="-Xnoloa" class="md-nav__link">
       -Xnoloa
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsigcatch/" title="-Xnosigcatch" class="md-nav__link">
       -Xnosigcatch
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsigchain/" title="-Xnosigchain" class="md-nav__link">
       -Xnosigchain
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xnumanone/" title="-Xnuma:none" class="md-nav__link">
       -Xnuma:none
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xoptionsfile/" title="-Xoptionsfile" class="md-nav__link">
       -Xoptionsfile
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xquickstart/" title="-Xquickstart" class="md-nav__link">
       -Xquickstart
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xrs/" title="-Xrs" class="md-nav__link">
       -Xrs
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsamplingexpirationtime/" title="-XsamplingExpirationTime" class="md-nav__link">
       -XsamplingExpirationTime
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xscdmx/" title="-Xscdmx" class="md-nav__link">
       -Xscdmx
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   <li class="md-nav__item">
     <a href="../xscminaot/" title="-Xscmaxaot" class="md-nav__link">
       -Xscmaxaot
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xscminjitdata/" title="-Xscmaxjitdata" class="md-nav__link">
       -Xscmaxjitdata
     </a>
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   <li class="md-nav__item">
     <a href="../xscminaot/" title="-Xscminaot" class="md-nav__link">
       -Xscminaot
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   </li>


   <li class="md-nav__item">
     <a href="../xscminjitdata/" title="-Xscminjitdata" class="md-nav__link">
       -Xscminjitdata
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xscmx/" title="-Xscmx" class="md-nav__link">
       -Xscmx
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   </li>


   <li class="md-nav__item">
     <a href="../xshareclasses/" title="-Xshareclasses" class="md-nav__link">
       -Xshareclasses
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsigcatch/" title="-Xsigcatch" class="md-nav__link">
       -Xsigcatch
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsigchain/" title="-Xsigchain" class="md-nav__link">
       -Xsigchain
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsignal/" title="-Xsignal" class="md-nav__link">
       -Xsignal
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xsoftmx/" title="-Xsoftmx" class="md-nav__link">
       -Xsoftmx
     </a>
   </li>


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     <a href="../xsoftrefthreshold/" title="-Xsoftrefthreshold" class="md-nav__link">
       -Xsoftrefthreshold
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     <a href="../xss/" title="-Xss" class="md-nav__link">
       -Xss
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       -Xssi
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   <li class="md-nav__item">
     <a href="../xsyslog/" title="-Xsyslog" class="md-nav__link">
       -Xsyslog
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   <li class="md-nav__item">
     <a href="../xtgc/" title="-Xtgc" class="md-nav__link">
       -Xtgc
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   <li class="md-nav__item">
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       -Xthr
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   <li class="md-nav__item">
     <a href="../xtlhprefetch/" title="-XtlhPrefetch" class="md-nav__link">
       -XtlhPrefetch
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   <li class="md-nav__item">
     <a href="../xtrace/" title="-Xtrace" class="md-nav__link">
       -Xtrace
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xtunevirtualized/" title="-Xtune:virtualized" class="md-nav__link">
       -Xtune:virtualized
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   <li class="md-nav__item">
     <a href="../xverbosegclog/" title="-Xverbosegclog" class="md-nav__link">
       -Xverbosegclog
     </a>
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   <li class="md-nav__item">
     <a href="../xverify/" title="-Xverify" class="md-nav__link">
       -Xverify
     </a>
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       -Xzero
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     <a href="../xx_jvm_commands/" title="Using -XX options" class="md-nav__link">
       Using -XX options
     </a>
   </li>


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     <a href="../xxactiveprocessorcount/" title="-XXActiveProcessorCount" class="md-nav__link">
       -XXActiveProcessorCount
     </a>
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   <li class="md-nav__item">
     <a href="../xxallowvmshutdown/" title="-XXallowvmshutdown" class="md-nav__link">
       -XXallowvmshutdown
     </a>
   </li>


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     <a href="../xxalwayspretouch/" title="-XX:[+|-]AlwaysPreTouch" class="md-nav__link">
       -XX:[+|-]AlwaysPreTouch
     </a>
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     <a href="../xxclassrelationshipverifier/" title="-XX:[+|-]ClassRelationshipVerifier" class="md-nav__link">
       -XX:[+|-]ClassRelationshipVerifier
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   <li class="md-nav__item">
     <a href="../xxconcgcthreads/" title="-XX:ConcGCThreads" class="md-nav__link">
       -XX:ConcGCThreads
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       -XX:codecachetotal
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   </li>


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     <a href="../xxcompactstrings/" title="-XX:[+|-]CompactStrings" class="md-nav__link">
       -XX:[+|-]CompactStrings
     </a>
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     <a href="../xxdiagnosesynconvaluebasedclasses/" title="-XX:DiagnoseSyncOnValueBasedClasses" class="md-nav__link">
       -XX:DiagnoseSyncOnValueBasedClasses
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   <li class="md-nav__item">
     <a href="../xxdisableexplicitgc/" title="-XX:[+|-]DisableExplicitGC" class="md-nav__link">
       -XX:[+|-]DisableExplicitGC
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxdisclaimjitscratch/" title="-XX:[+|-]DisclaimJitScratch" class="md-nav__link">
       -XX:[+|-]DisclaimJitScratch
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     <a href="../xxenablecpumonitor/" title="-XX:[+|-]EnableCPUMonitor" class="md-nav__link">
       -XX:[+|-]EnableCPUMonitor
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   <li class="md-nav__item">
     <a href="../xxexitonoutofmemoryerror/" title="-XX:[+|-]ExitOnOutOfMemoryError" class="md-nav__link">
       -XX:[+|-]ExitOnOutOfMemoryError
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   <li class="md-nav__item">
     <a href="../xxgloballockreservation/" title="-XX:[+|-]GlobalLockReservation" class="md-nav__link">
       -XX:[+|-]GlobalLockReservation
     </a>
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   <li class="md-nav__item">
     <a href="../xxhandlesigxfsz/" title="-XX:[+|-]HandleSIGXFSZ" class="md-nav__link">
       -XX:[+|-]HandleSIGXFSZ
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxhandlesigabrt/" title="-XX:[+|-]HandleSIGABRT" class="md-nav__link">
       -XX:[+|-]HandleSIGABRT
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxheapdumponoutofmemory/" title="-XX:[+|-]HeapDumpOnOutOfMemory" class="md-nav__link">
       -XX:[+|-]HeapDumpOnOutOfMemory
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   </li>


   <li class="md-nav__item">
     <a href="../xxheapdumppath/" title="-XX:HeapDumpPath" class="md-nav__link">
       -XX:HeapDumpPath
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxheapmanagementmxbeancompatibility/" title="-XX:[+|-]HeapManagementMXBeanCompatibility" class="md-nav__link">
       -XX:[+|-]HeapManagementMXBeanCompatibility
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   </li>


   <li class="md-nav__item">
     <a href="../xxidletuningcompactonidle/" title="-XX:[+|-]IdleTuningCompactOnIdle" class="md-nav__link">
       -XX:[+|-]IdleTuningCompactOnIdle
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   </li>


   <li class="md-nav__item">
     <a href="../xxidletuninggconidle/" title="-XX:[+|-]IdleTuningGcOnIdle" class="md-nav__link">
       -XX:[+|-]IdleTuningGcOnIdle
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   </li>


   <li class="md-nav__item">
     <a href="../xxidletuningminfreeheaponidle/" title="-XX:IdleTuningMinFreeHeapOnIdle" class="md-nav__link">
       -XX:IdleTuningMinFreeHeapOnIdle
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   <li class="md-nav__item">
     <a href="../xxidletuningminidlewaittime/" title="-XX:IdleTuningMinIdleWaitTime" class="md-nav__link">
       -XX:IdleTuningMinIdleWaitTime
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxignoreunrecognizedvmoptions/" title="-XX:[+|-]IgnoreUnrecognizedVMOptions" class="md-nav__link">
       -XX:[+|-]IgnoreUnrecognizedVMOptions
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   <li class="md-nav__item">
     <a href="../xxignoreunrecognizedxxcolonoptions/" title="-XX:[+|-]IgnoreUnrecognizedXXColonOptions" class="md-nav__link">
       -XX:[+|-]IgnoreUnrecognizedXXColonOptions
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   <li class="md-nav__item">
     <a href="../xxinitialrampercentage/" title="-XX:InitialRAMPercentage" class="md-nav__link">
       -XX:InitialRAMPercentage
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   <li class="md-nav__item">
     <a href="../xxinitialheapsize/" title="-XX:InitialHeapSize" class="md-nav__link">
       -XX:InitialHeapSize
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxinterleavememory/" title="-XX:[+|-]InterleaveMemory" class="md-nav__link">
       -XX:[+|-]InterleaveMemory
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxjitinlinewatches/" title="-XX:[+|-]JITInlineWatches" class="md-nav__link">
       -XX:[+|-]JITInlineWatches
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxlazysymbolresolution/" title="-XX:[+|-]LazySymbolResolution" class="md-nav__link">
       -XX:[+|-]LazySymbolResolution
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxlegacyxlogoption/" title="-XX:[+|-]LegacyXLogOption" class="md-nav__link">
       -XX:[+|-]LegacyXLogOption
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxmaxdirectmemorysize/" title="-XX:MaxDirectMemorySize" class="md-nav__link">
       -XX:MaxDirectMemorySize
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxinitialheapsize/" title="-XX:MaxHeapSize" class="md-nav__link">
       -XX:MaxHeapSize
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxinitialrampercentage/" title="-XX:MaxRAMPercentage" class="md-nav__link">
       -XX:MaxRAMPercentage
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxonoutofmemoryerror/" title="-XX:OnOutOfMemoryError" class="md-nav__link">
       -XX:OnOutOfMemoryError
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxoriginaljdk8heapsizecompatibilitymode/" title="-XX:[+|-]OriginalJDK8HeapSizeCompatibilityMode" class="md-nav__link">
       -XX:[+|-]OriginalJDK8HeapSizeCompatibilityMode
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxnosuballoc32bitmem/" title="-XXnosuballoc32bitmem" class="md-nav__link">
       -XXnosuballoc32bitmem
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxpagealigndirectmemory/" title="-XX:[+|-]PageAlignDirectMemory" class="md-nav__link">
       -XX:[+|-]PageAlignDirectMemory
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxparallelcmsthreads/" title="-XX:ParallelCMSThreads" class="md-nav__link">
       -XX:ParallelCMSThreads
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxparallelgcthreads/" title="-XX:ParallelGCThreads" class="md-nav__link">
       -XX:ParallelGCThreads
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxportablesharedcache/" title="-XX:[+|-]PortableSharedCache" class="md-nav__link">
       -XX:[+|-]PortableSharedCache
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxpositiveidentityhash/" title="-XX:[+|-]PositiveIdentityHash" class="md-nav__link">
       -XX:[+|-]PositiveIdentityHash
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxprintcodecache/" title="-XX:[+|-]PrintCodeCache" class="md-nav__link">
       -XX:[+|-]PrintCodeCache
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxprintflagsfinal/" title="-XX:[+|-]PrintFlagsFinal" class="md-nav__link">
       -XX:[+|-]PrintFlagsFinal
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxreadipinfoforras/" title="-XX:[+|-]ReadIPInfoForRAS" class="md-nav__link">
       -XX:[+|-]ReadIPInfoForRAS
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   <li class="md-nav__item">
     <a href="../xxreducecpumonitoroverhead/" title="-XX:[+|-]ReduceCPUMonitorOverhead" class="md-nav__link">
       -XX:[+|-]ReduceCPUMonitorOverhead
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxruntimeinstrumentation/" title="-XX:[+|-]RuntimeInstrumentation" class="md-nav__link">
       -XX:[+|-]RuntimeInstrumentation
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../xxsethwprefetch/" title="-XXsetHWPrefetch" class="md-nav__link">
       -XXsetHWPrefetch
     </a>
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   <li class="md-nav__item">
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       -XX:[+|-]ShareAnonymousClasses
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       -XX:ShareClassesDisableBCI
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       -XX:ShareClassesEnableBCI
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     <a href="../xxsharedcachehardlimit/" title="-XX:SharedCacheHardLimit" class="md-nav__link">
       -XX:SharedCacheHardLimit
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   <li class="md-nav__item">
     <a href="../xxshareunsafeclasses/" title="-XX:[+|-]ShareUnsafeClasses" class="md-nav__link">
       -XX:[+|-]ShareUnsafeClasses
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     <a href="../xxstacktraceinthrowable/" title="-XX:-StackTraceInThrowable" class="md-nav__link">
       -XX:-StackTraceInThrowable
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   <li class="md-nav__item">
     <a href="../xxtransparenthugepage/" title="-XX:[+|-]TransparentHugePage" class="md-nav__link">
       -XX:[+|-]TransparentHugePage
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   <li class="md-nav__item">
     <a href="../xxusecompressedoops/" title="-XX:[+|-]UseCompressedOops" class="md-nav__link">
       -XX:[+|-]UseCompressedOops
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   <li class="md-nav__item">
     <a href="../xxusecontainersupport/" title="-XX:[+|-]UseContainerSupport" class="md-nav__link">
       -XX:[+|-]UseContainerSupport
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   <li class="md-nav__item">
     <a href="../xxusegcstartuphints/" title="-XX:[+|-]UseGCStartupHints" class="md-nav__link">
       -XX:[+|-]UseGCStartupHints
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   <li class="md-nav__item">
     <a href="../xxusenogc/" title="-XX:[+|-]UseNoGC" class="md-nav__link">
       -XX:[+|-]UseNoGC
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     <a href="../xxverboseverification/" title="-XX:[+|-]VerboseVerification" class="md-nav__link">
       -XX:[+|-]VerboseVerification
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     <a href="../xxvmlockclassloader/" title="-XX:[+|-]VMLockClassLoader" class="md-nav__link">
       -XX:[+|-]VMLockClassLoader
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       Default settings
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       Signal handling
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       Directory conventions
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       Data access acceleration
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       DTFJ
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       GPU
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       JVM diagnostic utilities
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       Monitoring and management
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 <h1 id="whats-new-in-version-0220">What's new in version 0.22.0</h1>
 <p>The following new features and notable changes since v 0.21.0 are included in this release:</p>
 <ul>
 <li><a href="#binaries-and-supported-environments">New binaries and changes to supported environments</a></li>
 <li><a href="#performance-improvements">Performance improvements</a></li>
 <li><a href="#new-xx-portablesharedcache-option-added">New <code>-XX:[+|-]PortableSharedCache</code> option added</a></li>
 <li><a href="#methods-in-comibmlangmanagementmemorymxbean-deprecated-and-replaced">Methods in <code>com.ibm.lang.management.MemoryMXBean</code> deprecated and replaced</a></li>
 <li><a href="#javalangsystemmaplibraryname-string-suffix"><img alt="Start of content that applies to AIX Java 15+" src="../cr/java15plus.png" /> <code>java.lang.System.mapLibraryName()</code> string suffix</a></li>
 </ul>
 <h2 id="features-and-changes">Features and changes</h2>
 <h3 id="binaries-and-supported-environments">Binaries and supported environments</h3>
 <p>OpenJ9 release 0.22.0 supports OpenJDK 15. Binaries are available from the AdoptOpenJDK community at the following link:</p>
 <ul>
 <li><a href="https://adoptopenjdk.net/archive.html?variant=openjdk15&amp;jvmVariant=openj9">OpenJDK version 15</a></li>
 </ul>
 <p>OpenJDK 15 with Eclipse OpenJ9 is not a long term support (LTS) release.</p>
 <p>The latest builds of OpenJDK with OpenJ9 for Java 8 and 11 at the AdoptOpenJDK community are for Eclipse OpenJ9 release 0.21.0. Features mentioned in these release notes are not available in these Java 8 and 11 builds. Although it might be possible to build an OpenJDK 8 or OpenJDK 11 with OpenJ9 0.22.0, testing at the project is not complete and therefore support for any of these features is not available.</p>
 <p>To learn more about support for OpenJ9 releases, including OpenJDK levels and platform support, see <a href="../openj9_support/">Supported environments</a>.</p>
 <h3 id="performance-improvements">Performance improvements</h3>
 <p>The performance of zero initializing Java heap memory improved on the IBM Z&reg; platform because of a change to use <code>memset</code> instead of an outdated handcrafted assembly sequence in the JVM.</p>
 <h3 id="new-xx-portablesharedcache-option-added">New <code>-XX:[+|-]PortableSharedCache</code> option added</h3>
 <p>On x86 only, the <code>-XX:[+|-]PortableSharedCache</code> option enables you to choose whether AOT code should be generated using an older processor (Intel&reg; Sandybridge) feature set, which therefore allows the AOT code to be portable. This feature is particularly relevant for packaging a shared classes cache into a container image (for example, applications deployed on the cloud in the form of Docker containers) because the processor on which the container image is built is likely to be different from the processor on which the container is deployed. For more information, see <a href="../xxportablesharedcache/"><code>-XX:[+|-]PortableSharedCache</code></a>.</p>
 <h3 id="methods-in-comibmlangmanagementmemorymxbean-deprecated-and-replaced">Methods in <code>com.ibm.lang.management.MemoryMXBean</code> deprecated and replaced</h3>
 <p>The methods <code>com.ibm.lang.management.MemoryMXBean.getGCMasterThreadCpuUsed()</code> and <code>com.ibm.lang.management.MemoryMXBean.getGCSlaveThreadsCpuUsed()</code> are deprecated for removal in Java 16. The recommended methods to be used are <code>com.ibm.lang.management.MemoryMXBean.getGCMainThreadCpuUsed()</code> and <code>com.ibm.lang.management.MemoryMXBean.getGCWorkerThreadsCpuUsed()</code> respectively.</p>
 <p>For more information see Java 8: <a href="../api/jdk8/jre/management/extension/com/ibm/lang/management/MemoryMXBean.html"><code>com.ibm.lang.management.MemoryMXBean</code></a> and for Java 11: <a href="../api/jdk11/jdk.management/com/ibm/lang/management/MemoryMXBean.html"><code>com.ibm.lang.management.MemoryMXBean</code></a></p>
 <h3 id="javalangsystemmaplibraryname-string-suffix"><img alt="Start of content that applies to Java 15+" src="../cr/java15plus.png" /> <code>java.lang.System.mapLibraryName()</code> string suffix</h3>
 <p>On AIX&reg; systems, <code>java.lang.System.mapLibraryName(libname)</code> returns a representation of a native library in a platform-specific string with a <code>.so</code> suffix.</p>
 <h2 id="full-release-information">Full release information</h2>
 <p>To see a complete list of changes between Eclipse OpenJ9 v 0.21.0 and v 0.22.0 releases, see the <a href="https://github.com/eclipse/openj9/blob/master/doc/release-notes/0.22/0.22.md">Release notes</a>.</p>
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