Shulou(Shulou.com)06/03 Report--

Find the reason why the java process occupies too much CPU under linux

1. Lookup process

Top to check the resource consumption of the process

It is obvious that the two processes of java 22714 dint 12406 take up too much cpu.

two。 Lookup thread

Use top-H-p to view thread occupancy

3. Find stack information for java

Convert thread id to hexadecimal

# printf% x 15664

# 3d30

Then use jstack to query the stack information of the thread

Syntax: jstack | grep-a thread id (hex)

Jstack | grep-a 3d30

In this way, the problematic code has been found.

All that's left is to analyze the cause and modify the code.

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