Change Java heap size in Tomcat in Azure App Service

Premise

Azure WebApp server type is Windows

operation

1. Open App Service on the Azure web console
2. Open "Advanced Tools" among Development Tools (Kudu)
3. Open "CMD" from Debug Console (can be used as GUI, not just command line)
4. Since "D: \ home" is open by default, open "D: \ home \ site \ wwwroot" (also possible with mouse operation)
5. Click the "+" to the right of [wwwroot] and select "New File"
6. Create a file called "web.config" and do the following: Check "% AZURE_TOMCAT90%" because it depends on the version of TOMCAT. (The SET command displays a list of environment variables, so you can check it there.)
7. Restart the app

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <handlers>
        <add name="httpPlatformHandler" path="*" verb="*" modules="httpPlatformHandler" resourceType="Unspecified" />
    </handlers>
    <httpPlatform processPath="%AZURE_TOMCAT90_HOME%\bin\startup.bat" arguments="">
      <environmentVariables>
        <environmentVariable name="JAVA_OPTS" value="-Xmx1500m -Xms1024m -Djava.net.preferIPv4Stack=true" />
      </environmentVariables>
    </httpPlatform>
  </system.webServer>
</configuration>

that's all.