Tomcat automatically sleeps on Alibaba Cloud server

Add the following code to the catalina.sh file:

JAVA_OPTS="-server-Xms4096m -Xmx4096m -Xmn512m -XX:PermSize=1024M -XX:MaxPermSize=2048m -Xss1024k-XX:SurvivorRatio=4 -XX:MaxTenuringThreshold=20 -XX:+UseParNewGC-XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=73-XX:+UseCMSCompactAtFullCollection -XX:+CMSParallelRemarkEnabled-XX:CMSFullGCsBeforeCompaction=2 -Djava.awt.headless=true" 

 

In addition, if the amount of concurrency is large, increase the connection pool of JDBC/C3P0 as appropriate.