What is concurrent request (-c) in Apache Benchmark?

apache apachebench
Sahal picture Sahal · Jul 26, 2011 · Viewed 18.3k times · Source

What is concurrent request (-c) in apache benchmark?

I think it is number of simultaneous request(Process) created in single point of time?

Can anybody explain if I am wrong? Can you give some example how concurrent request will work? How can I test this like Boundary Value Analysis(BVA) testing

Answer

Rakesh Sankar picture Rakesh Sankar · Jul 27, 2011

You are correct.

In simple words, ab -n 1000 -c 5 http://www.example.com/

where,

-n 1000: ab will send 1000 number of requests to example.com server in order to perform for the benchmarking session

-c 5 : 5 is concurrency number i.e. ab will send 5 number of multiple requests to perform at a same time to example.com server

Came across the following SO question where one of the answer says ab is not a perfect benchmark tool, since, you have CSS/JS/Images factors to consider when it comes to benchmark - Can someone please explain what these ApacheBench results mean?

Related questions

How to install Apache Bench on Windows 7?

I want to install Apache Bench on Windows, can someone tell me which MSI to get? I did install some MSI but it seems to have installed apache http server. I just need to run Apache Bench, as I am …

Read More
Changing POST data used by Apache Bench per iteration

I'm using ab to do some load testing, and it's important that the supplied querystring (or POST) parameters change between requests. I.e. I need to make requests to URLs like: http://127.0.0.1:9080/meth?param=0 http://127.0.0.1:9080/meth?param=1 http://127.0.0.1:9080/meth?param=2 ... …

Read More
Does Node.js perform badly on Windows, surely it can't be slower than apache for basic I/O

Question: Are the result that i'm getting reasonable? Is there anything which could have such an impact in reducing the number of requests per second? Edit: A friend of mine has just benchmarked the same application on Linux and the …

Read More