Performance Reliability

Reliability under Load

I’m a big fan of performance reliability, and it isn’t the expensive & ‘cheap thinking’ type that is failover and resilience.  I’m talking about ‘functional performance resilience’ – the one where your system doesn’t blow up because someone somewhere has entered something silly or there has been a series of system defects that causes the system to […]

Creating a Performant System

Custom Graphs

“Hmmm, how can I make a system more Performant….?” .  I was tasked recently with making a fairly large system “More Performant” and I thought – what is a Performant system?  I’ve come across the term a fair bit recently and everyone has a slightly different view of what Performant is.   If everyone has a […]

Problems With an encapsulated approach

Unforeseen costs

Unforeseen Costs of an encapsulated approach:  We need to abstract, encapsulate and hide complexity in order to build complex behaviour   This is why we have OO, SOAP, web services and other SOA approaches.  But for all the benefits they give I see practical disadvantages emerging in the real world.  As we sew more encapsulated objects together there is […]

Performance Testing is hitting the wall

Load Testing is breaking

I’m going to write about something that has been increasingly concerning me.   The current method of Performance Testing – capture network level traffic, inspection, correlate, and then replay, is becoming more difficult.  In the good old days we had simple GET and POST requests.  Then Ajax and Web2 came along, making things a little trickier.  […]

Concurrency of Users Vs Increasing Transaction Rate

Large Number of Users

I’m going to write about increasing the number of transactions to simulate a higher number of Virtual Users.  This is a common technique used by performance testers to ‘cheat’ or rather avoid the high costs associated charged by vendors.  I recently answered a question on Linkedin and suggested increasing the transaction rate. I was sent the following message […]

LoadRunner to JMeter – A successful transition


 It all began on the day when a bunch of three performance testers were given a task of migrating the performance testing activities of multiple applications of a client to an open source tool. This included architectural level migration, resource knowledge transition and testing-operation transition from a licensed tool (LoadRunner) to an open source tool. […]

Performance Benchmark Testing Part II

Performance Benchmarking

My previous article details an approach for creating Performance Benchmarks.  I will build on the foundations laid out and describe how a powerful process was created on a customer site using these principles. Benchmarking Problem: I’m going to describe how I took a benchmarking process that took 2+ days, involved lots of manual intervention, was prone […]

Performance Benchmark Testing – Part 1

I’ve been meaning to writing a short section on Performance Benchmark Testing for some time. I’ve come across a few situations recently where this is the ideal solution. Benchmark performance testing is the most powerful and commonly used type of test in the Performance Testers toolkit. So lets start with a definition of what benchmark […]

Mobile Performance Testing – Questionable Value?

Mobile Testing

The hot topic is ‘Mobile’.  Its finally hitting the mainstream and everyone is interested.  People are browsing and buying on mobile – and if the application is performing poorly for the end user then they simply ditch and go elsewhere.  This acutely brings attention to speed and generates a lot of interest in the performance testing […]

Performance By Design II

Performance Design II

In my last article (Performance By Design- An Agile Approach) I essentially outlined a method for ensuring performance is enforced throughout a project from the onset.  ‘Performance by Design’ in this context is a misnomer. True “Performance by Design” is abstract; it’s about taking good design practices and ensuring the product is fundamentally scalable.  Performance by design […]