Diagnose Nginx CPU Bottleneck

Scenario

The web server has become sluggish and users are experiencing timeout errors. Multiple worker processes are running under the nginx user, and one of them is consuming excessive CPU resources, causing the entire application to slow down.

Task

Identify the process running under the nginx user that consumes the most CPU or memory, and write its PID to /home/devops/solution.txt.

Example

# Before (multiple nginx processes, one consuming excessive resources)

USER       PID   %CPU  %MEM COMMAND
nginx     12345  92.3   4.1 nginx: worker process
nginx     12346  15.4   2.8 nginx: worker process
nginx     12347   1.2   1.0 nginx: worker process
python3   22310  45.7   6.2 python3 app.py
java      19872  37.9  12.4 java -jar app.jar

# After (PID of highest-consuming nginx process identified)

12345

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