Small Imrovements, makers of a hosted, lightweight feedback platform, have written an excellent article on Performance issues on GAE, and how we resolved them. They show how they trimmed most of their requests to between 300ms and 800ms, some sti…
Month: October 2011
Stuff The Internet Says On Scalability For October 28, 2011
You deserve a HighScalability today:
S3: 566 Billion Objects, 370K requests/sec; Titan: 38,400-processor, 20-petaflop
1,000,000 daily users and no cache. Wooga flash game with 50K DB updates/second, Ruby backend. They hit an IO wall with MySQL at…
Timesaver tips for HP Loadrunner Analysis
Here are a number of tricks to cut down effort required for making Analysis data available with HP Performance Center. I realized,that some of these are not known when talking to colleagues who have been working with Performance Center for a while. I decided to collect them here… Hopefully it will be a benefit for […]
Using XPath with Loadrunner
One of the critiques that can be often heard from script developers, is that Loadrunner does not support regular expressions to extract data from HTML responses. True, the substring-method offered by web_reg_save_param() does not offer too much flexibility, although it is a very easy and powerful way to extract parts of a http response. Unfortunately […]
My Top Tips For Performance Testing
Here are my top ten guidelines (in no particular order) for effective performance testing. Follow these and it will be hard to go wrong: End User Perspective: First and foremost focus on holistic system performance testing. It’s the end user experience that ultimately counts. Don’t get initially distracted with items such as subsystem testing. Just […]
Monitoring System resources with HP Performance Center
During test execution Loadrunner measures basic performance metrics, such as response times, transactions per second, transferred bytes, etc. However to have the proper overview, it is vital to see the impact of the test on the tested hardware and software. Hardware utilization (CPU, disk I/O, network) and software counters (entity cache statistics, software-internal metrics) are […]
Configuring target hostname in Loadrunner tests
Have more than one test-systems makes it imperative to make the target hostname parametric in the Loadrunner scripts, particularly if it is intended to run the Loadrunner script from time to time on different environments. First, create a new Additional Attribute for the target hostname in VuGen (press F4, then select Additional Attributes). Specify a […]
How to take your sites performance SLA to the next level
Domino’s knew how to create a great customer SLA: Your pizza in 30 minutes or it’s free. How can the average site owner create a website SLA as compelling as Domino’s? Some thoughts.
Using Shared Data Server (SDS) for Test Control Ramp-Up Control
In this post I will explain how to use Facilita Forecast Shared Data Server (SDS) to control user ramp-up whilst executing a Load Test. Two occasions come to mind where this may come in useful: You need to find a breaking point, but you would like to have fine grained control of user ramp-up. E.g. […]
Why VuGen is an old gen?
New generation programmers do not program in C. This is the sentence I have learnt on the latest Loadrunner training I was teaching. University students study C and C++ programming language optionally nowadays and when they do, they only use it for a semester. Moreover they are quickly seduced by programming languages running in managed […]
