IOPS

Application startup duration is an essential component of user experience. If you want to make sure that UX on your Windows machines is acceptable you need to monitor the time it takes for applications to start up. That, however, is not exactly easy - without uberAgent for Splunk.

Analyzing slow boots is a difficult task. You need to install software like XPerf and master its far-from-intuitive command-line options to generate a trace file that you can then analyze. Once you find a possible cause for the long startup duration you never know if it is specific to the machine you analyzed or if it affects other PCs, too. In other words: XPerf, although powerful, is difficult to master. And it does not scale. uberAgent does. And it is super-easy to use.

Let use take a look at some graphs I created with Windows Performance Analyzer (WPA), showing a typical corporate laptop boot Windows 7. Detailed information on creating such a trace can be found in my earlier article Analyzing a Slow Boot with Windows Performance Recorder & Analyzer.

If you have ever used Sysinternals’ Process Monitor, chances are high you were a little intimidated when you looked at your first capture: it probably contained hundreds of thousands of registry and file system events, generated in a minute or less. That amount of activity must surely indicate high system load - but strangely, very often it does not. Looking at the hard disk LED you will only see an occasional flickering, even though thousands of file system events are captured per second. How is that possible? Read on to find out.

[Update on 29/06/2012: added tests 5 and 6 with RAID controller cache and Atlantis Ilio] When a 400 GB SSD comes nearly at the price of a small car, you expect a lot, performance-wise. At least I did when I got my hands on two drives from HP’s enterprise performance series. Read on to find out if that hefty price tag is justified.