15.4. 高级 Undertow 配置

<!-- Only "default" worker and buffer-pool are supported and can be used to override the default values used by all listeners
    buffer-pool:
     - buffer-size defaults to:
        - when < 64MB of Xmx: 512
        - when < 128MB of Xmx: 1024
        - when >= 128MB of Xmx: 16K - 20
     - direct-buffers defaults to:
        - when < 64MB of Xmx: false
        - when >= 64MB of Xmx: true
    worker:
     - io-threads defaults to Math.max(Runtime.getRuntime().availableProcessors(), 2);
     - task-core-threads and task-max-threads default to io-threads * 8
-->

<!--
<subsystem xmlns="urn:jboss:domain:io:3.0">
    <buffer-pool name="default" buffer-size="16364" direct-buffers="true" />
    <worker name="default" io-threads="8" task-core-threads="64" task-max-threads="64" task-keepalive="60000" />
</subsystem>
-->