Pregunta de entrevista

Entrevista para Senior Software Engineer

-San Francisco, CA

MuleSoft

I was asking to build a shell script which executes a number of performance tests on an application to find issues/bottlenecks in the application.

Respuesta

Respuesta de la entrevista

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I was able to create the shell script using apache ab the tool would dump resulting aggregated data (qps, response time) to a csv file. After running a batch of 10+ (short) tests I found out that the throughput plateaued after 10 thread-concurrency. I told the interviewer that we can tell that the application server is still under utilized (5% cpu) so there must be a configuration/code bottleneck in the application or the container which is causing the bottleneck. The interviewer revealed that indeed it was the max threads which were configured to be 10 on the application container causing this bottleneck.

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