Tomcat 線程查看工具：
https://blog.csdn.net/jrainbow/article/details/49026365
16G內存 Tomcat並發優化、內存配置、垃圾回收、宕機預防
https://blog.csdn.net/u010133338/article/details/81142902
Tomcat之——內存溢出設置JAVA_OPTS
https://blog.csdn.net/l1028386804/article/details/52676480
TCP連接的TIME_WAIT過多導致 Tomcat 假死
http://www.bubuko.com/infodetail-2253455.html