最近在寫tcp的壓力測試程式，遇到了檔案描述符上限的問題，按照網上的方法怎麼也改不了上限，偶然發現了這個針對Mac OS Yosemite的方法：1、建立/Library/LaunchDaemons/limit.maxfiles.plist，並輸入以下內容：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
  <plist version="1.0">
    <dict>
      <key>Label</key>
        <string>limit.maxfiles</string>
      <key>ProgramArguments</key>
        <array>
          <string>launchctl</string>
          <string>limit</string>
          <string>maxfiles</string>
          <string>65536</string>
          <string>65536</string>
        </array>
      <key>RunAtLoad</key>
        <true/>
      <key>ServiceIPC</key>
        <false/>
    </dict>
  </plist>
 

2、建立/Library/LaunchDaemons/limit.maxproc.plist，並輸入以下內容：

<pre name="code" class="html"><?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple/DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
  <plist version="1.0">
    <dict>
      <key>Label</key>
        <string>limit.maxproc</string>
      <key>ProgramArguments</key>
        <array>
          <string>launchctl</string>
          <string>limit</string>
          <string>maxproc</string>
          <string>2048</string>
          <string>2048</string>
        </array>
      <key>RunAtLoad</key>
        <true />
      <key>ServiceIPC</key>
        <false />
    </dict>
  </plist>
 

</pre><pre name="code" class="html">3、重啟系統

</pre><pre name="code" class="html">其他mac系統可以參考http://docs.basho.com/riak/latest/ops/tuning/open-files-limit/