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      -Djdk.nativeCrypto
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      -Djdk.nativeDigest
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      -Djdk.nativeGCM
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    <a href="../djdknativersa/" title="-Djdk.nativeRSA" class="md-nav__link">
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      Using -X options
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      -X
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      -Xaggressive
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      -Xalwaysclassgc
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      -Xaot
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      -Xbootclasspath
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      -XCEEHDLR
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      -Xcomp
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      -Xcompactexplicitgc
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      -Xconcurrentbackground
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      -Xconcurrentlevel
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      -Xconcurrentslack
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      -Xconmeter
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      -Xdisableexcessivegc
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  <li class="md-nav__item">
    <a href="../xenableexplicitgc/" title="-Xdisableexplicitgc" class="md-nav__link">
      -Xdisableexplicitgc
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      -Xdisablejavadump
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  <li class="md-nav__item">
    <a href="../xenablestringconstantgc/" title="-Xdisablestringconstantgc" class="md-nav__link">
      -Xdisablestringconstantgc
    </a>
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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
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  <li class="md-nav__item">
    <a href="../xenablestringconstantgc/" title="-Xenablestringconstantgc" class="md-nav__link">
      -Xenablestringconstantgc
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      -Xfastresolve
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    <a href="../xfuture/" title="-Xfuture" class="md-nav__link">
      -Xfuture
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  <li class="md-nav__item">
    <a href="../xgc/" title="-Xgc" class="md-nav__link">
      -Xgc
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      -Xgc:splitheap
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    <a href="../xgcpolicy/" title="-Xgcpolicy" class="md-nav__link">
      -Xgcpolicy
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  <li class="md-nav__item">
    <a href="../xgcthreads/" title="-Xgcthreads" class="md-nav__link">
      -Xgcthreads
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  </li>

        
  <li class="md-nav__item">
    <a href="../xgcworkpackets/" title="-Xgcworkpackets" class="md-nav__link">
      -Xgcworkpackets
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  <li class="md-nav__item">
    <a href="../xifa/" title="-Xifa" class="md-nav__link">
      -Xifa
    </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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    <a href="../xlinenumbers/" title="-Xlinenumbers" class="md-nav__link">
      -Xlinenumbers
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    <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
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      -XlockReservation
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      -Xlockword
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      -Xlp:codecache
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      -Xlp:objectheap
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  <li class="md-nav__item">
    <a href="../xmine/" title="-Xmaxe" class="md-nav__link">
      -Xmaxe
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  <li class="md-nav__item">
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      -Xmaxf
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      -Xmaxt
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  <li class="md-nav__item">
    <a href="../xmca/" title="-Xmca" class="md-nav__link">
      -Xmca
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    <a href="../xmca/" title="-Xmco" class="md-nav__link">
      -Xmco
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      -Xmcrs
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  <li class="md-nav__item">
    <a href="../xmine/" title="-Xmine" class="md-nav__link">
      -Xmine
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  <li class="md-nav__item">
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      -Xminf
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      -Xmint
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    <a href="../xmn/" title="-Xmn" class="md-nav__link">
      -Xmn
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  <li class="md-nav__item">
    <a href="../xmn/" title="-Xmns" class="md-nav__link">
      -Xmns
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    <a href="../xmn/" title="-Xmnx" class="md-nav__link">
      -Xmnx
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  <li class="md-nav__item">
    <a href="../xmo/" title="-Xmo" class="md-nav__link">
      -Xmo
    </a>
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    <a href="../xmo/" title="-Xmoi" class="md-nav__link">
      -Xmoi
    </a>
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    <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>
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  <li class="md-nav__item">
    <a href="../xmr/" title="-Xmr" class="md-nav__link">
      -Xmr
    </a>
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  <li class="md-nav__item">
    <a href="../xmr/" title="-Xmrx" class="md-nav__link">
      -Xmrx
    </a>
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  <li class="md-nav__item">
    <a href="../xms/" title="-Xms" class="md-nav__link">
      -Xms
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  <li class="md-nav__item">
    <a href="../xmso/" title="-Xmso" class="md-nav__link">
      -Xmso
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    <a href="../xms/" title="-Xmx" class="md-nav__link">
      -Xmx
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    <a href="../xaot/" title="-Xnoaot" class="md-nav__link">
      -Xnoaot
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    <a href="../xclassgc/" title="-Xnoclassgc" class="md-nav__link">
      -Xnoclassgc
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    <a href="../xcompactexplicitgc/" title="-Xnocompactexplicitgc" class="md-nav__link">
      -Xnocompactexplicitgc
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  </li>

        
  <li class="md-nav__item">
    <a href="../xcompactgc/" title="-Xnocompactgc" class="md-nav__link">
      -Xnocompactgc
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    <a href="../xcompressedrefs/" title="-Xnocompressedrefs" class="md-nav__link">
      -Xnocompressedrefs
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  <li class="md-nav__item">
    <a href="../xjit/" title="-Xnojit" class="md-nav__link">
      -Xnojit
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    <a href="../xlinenumbers/" title="-Xnolinenumbers" class="md-nav__link">
      -Xnolinenumbers
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  <li class="md-nav__item">
    <a href="../xloa/" title="-Xnoloa" class="md-nav__link">
      -Xnoloa
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  <li class="md-nav__item">
    <a href="../xsigcatch/" title="-Xnosigcatch" class="md-nav__link">
      -Xnosigcatch
    </a>
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  <li class="md-nav__item">
    <a href="../xsigchain/" title="-Xnosigchain" class="md-nav__link">
      -Xnosigchain
    </a>
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  <li class="md-nav__item">
    <a href="../xnumanone/" title="-Xnuma:none" class="md-nav__link">
      -Xnuma:none
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  <li class="md-nav__item">
    <a href="../xoptionsfile/" title="-Xoptionsfile" class="md-nav__link">
      -Xoptionsfile
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    <a href="../xquickstart/" title="-Xquickstart" class="md-nav__link">
      -Xquickstart
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    <a href="../xrs/" title="-Xrs" class="md-nav__link">
      -Xrs
    </a>
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  <li class="md-nav__item">
    <a href="../xsamplingexpirationtime/" title="-XsamplingExpirationTime" class="md-nav__link">
      -XsamplingExpirationTime
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    <a href="../xscdmx/" title="-Xscdmx" class="md-nav__link">
      -Xscdmx
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    <a href="../xscminaot/" title="-Xscmaxaot" class="md-nav__link">
      -Xscmaxaot
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    <a href="../xscminjitdata/" title="-Xscmaxjitdata" class="md-nav__link">
      -Xscmaxjitdata
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    <a href="../xscminaot/" title="-Xscminaot" class="md-nav__link">
      -Xscminaot
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  <li class="md-nav__item">
    <a href="../xscminjitdata/" title="-Xscminjitdata" class="md-nav__link">
      -Xscminjitdata
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    <a href="../xscmx/" title="-Xscmx" class="md-nav__link">
      -Xscmx
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    <a href="../xshareclasses/" title="-Xshareclasses" class="md-nav__link">
      -Xshareclasses
    </a>
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    <a href="../xsigcatch/" title="-Xsigcatch" class="md-nav__link">
      -Xsigcatch
    </a>
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    <a href="../xsigchain/" title="-Xsigchain" class="md-nav__link">
      -Xsigchain
    </a>
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  <li class="md-nav__item">
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<h1 id="-xlpcodecache">-Xlp:codecache</h1>
<p>Requests the OpenJ9 VM to allocate the JIT code cache by using large page sizes.</p>
<p>If the requested large page size is not available, the VM starts, but the JIT code cache is allocated by using a platform-defined size. A warning is displayed when the requested page size is not available.</p>
<p>To find out the large page sizes available and the current setting, use the <code>-verbose:sizes</code> option. Note that the current settings are the requested sizes and not the sizes obtained. For object heap size information, check the <code>-verbose:gc</code> output.</p>
<h2 id="syntax">Syntax</h2>
<p>AIX&reg;, Linux&reg;, macOS&reg;, and Windows&trade;:</p>
<pre><code>    -Xlp:codecache:pagesize=&lt;size&gt;
</code></pre>
<p>z/OS&reg;:</p>
<pre><code>    -Xlp:codecache:pagesize=&lt;size&gt;,pageable
</code></pre>
<p>See <a href="../x_jvm_commands/">Using -X command-line options</a> for more information about the <code>&lt;size&gt;</code> parameter.</p>
<h2 id="default-values">Default values</h2>
<h3 id="aix">AIX</h3>
<dl>
<dd>
<p>The code cache page size is controlled by the <code>DATAPSIZE</code> setting of the <code>LDR_CNTRL</code> environment variable. The page size cannot be controlled by the <code>-Xlp:codecache:pagesize=&lt;size&gt;</code> option. Specifying any other page size results in a warning that the page size is not available. The <code>-verbose:sizes</code> output reflects the current operating system setting.</p>
<p>For more information about the <code>LDR_CNTRL</code> environment variable, see <a href="https://www.ibm.com/support/knowledgecenter/SSYKE2_8.0.0/com.ibm.java.vm.80.doc/docs/j9_configure_aix_ldr_cntrl.html">Working with the LDR_CNTRL environment variable</a>.</p>
</dd>
</dl>
<h3 id="linux">Linux</h3>
<dl>
<dd>
<p>The default size for the code cache depends on the architecture:</p>
<ul>
<li>Linux on x86 and AMD64/EM64T systems: 2 MB large pages</li>
<li>Linux on IBM Z&reg;: 1 MB large pages</li>
<li>Linux on Power Systems&trade;: The code cache page size cannot be controlled by the <code>-Xlp:codecache:pagesize=&lt;size&gt;</code> option. Specifying any other page size results in a warning that the page size is not available. The <code>-verbose:sizes</code> output reflects the current operating system setting.</li>
<li>On other architectures, the VM uses the default operating system page size.</li>
</ul>
</dd>
</dl>
<h3 id="macos">macOS</h3>
<dl>
<dd>The default size for the code cache is 4 KB large pages.</dd>
</dl>
<h3 id="zos">z/OS</h3>
<dl>
<dd>
<p>1 MB pageable pages, when available, are the default size for the code cache.</p>
<p>The <code>-Xlp:codecache:pagesize=&lt;size&gt;,pageable</code> option supports only a large page size of 1 MB pageable large pages. The use of 1 MB pageable large pages for the JIT code cache can improve the runtime performance of some Java&trade; applications. A page size of 4 KB can also be used.</p>
</dd>
</dl>
<h2 id="see-also">See also</h2>
<ul>
<li><a href="https://www.ibm.com/support/knowledgecenter/SSYKE2_8.0.0/com.ibm.java.vm.80.doc/docs/j9_configure_large_page.html">Configuring large page memory allocation</a>.</li>
</ul>
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