Performance I just don’t understand Win 2008 vs Win 2012 on AWS
26 Jan 2013
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After having some weird connection issues over the last week since migrating my blog and portfolio to an alternative configuration instance based on Windows Server 2008 I decided to do a load test to see whether this was a bigger issue than I expected. The results I just cant explain.
Windows Server 2008, IIS Installed only with .NET4
Windows Server 2012, IIS Installed only with .NET4
As can be seen from the 2008 graph the server fell over very quickly and took a very long time to recover. After looking at this went to the CPU load and found the answer:
Windows Server 2008, IIS Installed only with .NET4
Windows Server 2012, IIS Installed only with .NET4
This wasn’t the profile of the CPU when I first set up the instance, I have no idea what has caused the development of this maxed CPU issue. Will have to look into more, but for the moment am back on 2012! Does demonstrate the importance of setting up alarms though, another nice functionality on the AWS platform.
Edit:
Maximum Load Test
I have also done a max load test just to see how much the server could take, maxes out about 70 users. Tested against blog, so all img,js and css are additional calls wrapped into one user call. Granted when server hits max capacity is essentially unresponsive.
Assistant Professor in Visual Computing at Durham University. Stuart's research focus is on Visual Reasoning to understand the layout of visual content from Iconography (e.g. Sketches) to 3D Scene understanding and their implications on methods of interaction. He is currently a co-I on the RePAIR EU FET, DCitizens EU Twinning, and BoSS EU Lighthouse. He was a co-I on the MEMEX RIA EU H2020 project coordinated at IIT for increasing social inclusion with Cultural Heritage. Stuart has previously held a Researcher & PostDoc positions at IIT as well as PostDocs at University College London (UCL), and the University of Surrey. Also, at the University of Surrey, Stuart was awarded his PhD on visual information retrieval for sketches. Stuart holds an External Scientist at IIT, Honorary roles UCL and UCL Digital Humanities, and an international collaborator of ITI/LARSyS. He also regularly organises Vision for Art (VISART) workshop and Humanities-orientated tutorials and was Program Chair at British Machine Conference (BMVC) 2021.