Lay Siege to your Servers

I had never used an open source load testing tool before I started working at my current company. But we are all about open source tools here, and have some great ones floating around. Siege was recommended by our Sys Admin Lead, who said he had not been able to find any other open source tools as powerful or easy to use as siege. With such a good recommendation, I set in to learn the program.

Siege is a load testing and benchmarking tool for web developers. It offers flexible options for customizing your script and then lays “siege” to your servers, testing their load capacity. It is incredibly handy, decently easy to use, and runs great on Linux  or OSX.

You can configure siege to test any number of concurrent users for a set amount of time.  Your tests can run against a single url, or to call a txt file containing a list of urls, so you can thoroughly test even complex webpages. You can download add ons like SPROXY from the same site that allows you to collect url data.

My favorite customizations are: -i (internet) to simulate internet users and -b (benchmark) which give s no delay for time testing. You can set a single test to repeat over again (-r) or print notifications to the screen (-v). You can even adjust the time delay (-d) to simulate actual human activity on the web page.

EX: here is a simple command, testing a single url.
 siege -c10 -t1 -i

Your script runs in the background (I run it on a different server, both for speed/accuracy and to keep my machine free) and when it finishes, it gives you your results and an overview of the test. Availability is the main thing to look at. It should always be at 100%, anything less means that users will have trouble accessing your site. Concurrency tells us the average number of simultaneous connections. Transaction rate is how fast each transaction was processed. These factors can all give you a good idea of what your website can handle.

Lifting the server siege...      done.
 Transactions:                 319 hits
 Availability:              100.00 %
 Elapsed time:               59.45 secs
 Data transferred:            0.75 MB
 Response time:                1.42 secs
 Transaction rate:            5.37 trans/sec
 Throughput:                0.01 MB/sec
 Concurrency:                7.63
 Successful transactions:         319
 Failed transactions:               0
 Longest transaction:           20.55
 Shortest transaction:            0.26

It is defiantly worth trying out to see if it fits your project, it has been a great addition to my QA toolbox.

Find a complete users manual and a download of the program on their main page: Joe Dog Software


One response to this post.

  1. useful tool thanks.


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: