Stress testing is a form of testing that is used to determine the stability of a given system or entity under load. It involves testing beyond normal operational capacity, often to a breaking point, in order to observe the results.

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Are there any tools for load / stress testing that can simulate image, video and audio uploads to Amazon EC2?

As part of my web application users can upload photos, audio and video files from a Flash SWF to my EC2 based upload server. I want to find a tool that I can use to stress test the EC2 instance (which ...
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1k views

What is a reliable stress-test tool for Dell R820 running VMware ESXi?

We have a Dell PowerEdge R820 running VMware ESXi that has had multiple CPU errors over the past two months. It was originally having an IERR on CPU1 and now is showing CPU Check errors for CPU3. I ...
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747 views

best practice or tools for stress test on a Tomcat application server and MySQL?

I am using Tomcat 6 application container for my web site. HTTP requests come from mobile phones and every time server receive a httprequest it opens MySQL connection, insert some data in it and then ...
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294 views

fio on virtual disk created with dd to stress disk

I am trying to create a script for my coworkers to use in the field that will stress the internal disks to a Linux server. I plan to put some logic in for finding the /dev/sd's available and such. But ...
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238 views

How do I interpret this Load Test result?

We used BlazeMeter to evaluate our site's capability to handle load. I set up a simple script that logs in (using a special page which ensures each load test user has a different account), visits ...
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188 views

How to automatically test the audio quality of a telephone line that randomly goes bad?

I am a computer scientist and I'm working as sysadmin of a small firm where I've been managing also the telephone system that my predecessor put in place. Albeit I don't really have the skill set for ...
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34 views

Right way of measuring overlay network performance

I am currently examining the performance (especially UDP throughput) of different Docker overlay networks. I do this by creating point-to-point connections between two hosts that are connected with a ...
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71 views

What exactly constitutes a bad TCP segment?

What constitutes a bad segment as in bad segments received in the netstat output below? I would think a TCP header's checksum could do it, but are there other things? If a segment arrives after its ...
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87 views

Stress Test Hard Drive attached to a LSI controller on Hyper-V

I have a LSI 9265-8i controller running on Hyper-V. How can I stress-test the hard disks in-situ? I'd like to test things like iOPS, seek times etc.
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308 views

test connection status and speed between azure vm and client

We have some VMs up and running, but we are seeing slow performance on some of them. We are unsure if it is a VM problem (Azure overloaded), an intermediate network problem or a problem on the client ...
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245 views

Interpreting Siege results with Nginx

I am trying to compare the performance of a clutch of web servers using Siege. Whilst the results from all the other servers are easy to understand I am having some difficulty understanding the ...
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305 views

APACHE/NGINX fine tuning for Apache Benchmark testing

I need to know some tuning configuration about APACHE/NGINX. I use Ubuntu Server 12.04.4 LTS on VirtuaBox with two VM: one with APACHE 2.2.22, the other with NGINX 1.1.19. In addition I installed PHP ...
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Stress testing Django app - how to improve throughput?

I'm having my first attempt at stress testing a simple django web app running from gunicorn and nginx which I’ve put on a small 256MB Rackspace Cloud server. Using httperf, I increase the number of ...
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456 views

server benchmarking with apache benchmark

We are testing one of our production server with ab and what we found is apr_socket_recv: Connection timed out (110) Total of 176 requests completed after some time above output.That means the ...
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Why number of transactions always change when using SIEGE?

I'm using SIEGE for stress testing I had used the same command for two or three times but the numbers of transactions always change every time I test. Can I specify the number of transactions to be ...
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330 views

Windows Server 2012 R2 Session Host - User Density testing

We use RDP RemoteApp technology on our servers to provide users an access to our applications. One of the challenges we faced (and what served as a reason of performance testing of RDP density) is ...
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top output seems fine, yet server is overloaded

This server I am benchmarking gives no obvious signs of getting overloaded at a first glance. top output: top - 22:48:25 up 5 days, 3:41, 3 users, load average: 3.19, 3.34, 3.25 Tasks: 146 total, ...