itecore Initial Cache-MasterDB.Config.xml

<?xml version="1.0"?>
<configuration xmlns:patch="https://www.sitecore.net/xmlconfig/">
  <sitecore>
    <databases>
      <database id="master" type="Sitecore.Data.DefaultDatabase, Sitecore.Kernel" singleInstance="true">
        <dataProviders hint="list:AddDataProvider">
          <dataProvider ref="dataProviders/main" param1="$(id)">
            <prefetch hint="raw:AddPrefetch">
              <cacheSize>200MB</cacheSize>
            </prefetch>
          </dataProvider>
        </dataProviders>
        <cacheSizes hint="setting">
          <data>200MB</data>
          <items>200MB</items>
        </cacheSizes>
      </database>
    </databases>
  </sitecore>
</configuration>