What can interfere with testing a server's performance?

0
votes

My HTTP server can't take load tests... It gives really high latency when multiple connections are made.

Server Configuration: 5 instances of (CPU 0.5vCore, Memory 512MB, Disk 20GB) A load balancer 10G shared bandwidth

When I transfer a 3.5mb zip, it takes about 1second when there is only one connection. However, when over 30 connections are made, it goes up to 20~50 seconds.

I am testing with JMeter on my laptop. Is there a possibility that my testing environment interferes with the load-testing?

If so, what would be a solution to improve my testing environment?

1
performancetestingload-testing

1 Answers

2
votes

First of all you need to monitor and pin down the problem(s).

Start off by picking up information on these four layers:

  • CPU Usage
  • Memory Usage
  • Network Usage
  • I/O Usage

All of them on the OS layer. (Monitoring tools will vary depending on your OS).

Once you have this data and you can narrow the problem path (CPU bound, network latency, I/O latency or whatever) an answer will kick in. Also doing this (if it is the first time you are trying to test your app) will help you get scaling information on your environment and your application in general.