Tomcat7+java the high CPU in the process of pressure measurement to troubleshoot and solve the problem

Ring Architecture Environment:

Front-end Haproxy as reverse proxy, backend n+1 Tomcat+java service

A problem occurred:

The environment is new, this week in the beginning of the pressure test normal, with the increase in volume, causing the CPU has been soaring.

Solutions and ideas:

1.) Use the top command to view the CPU-high PID

# according to the top command, the discovery of a process with a PID of 2195 and 975 consumes up to%200+ of CPU, which clearly fails

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2.) through Top-h-P PID command view, found 2275 3302 3375 These processes consume CPU time 8 minutes

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3.) convert the thread PID to 16, for example: The PID process above is converted to 3375 for d2f .

command:printf "%x\n" 3375

4.) Use the jstack command to output Java stack information for convenience or output to text for easy viewing.

command:jstack 2195 |grep d2f-a 30

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5.) send the output information to the developer for confirmation so that the problematic code can be identified .

This article is from the "Destiny." blog, be sure to keep this provenance http://hypocritical.blog.51cto.com/3388028/1827833

Tomcat7+java the high CPU in the process of pressure measurement to troubleshoot and solve the problem