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Lately, there have been outages for two large sites: Amazon and Facebook. Working for a company that monitors such things made me able to confirm the nature of the outages.  But how I became aware of them has had me thinking in new ways for the last few weeks.
I became aware of both of these [...]

Yes, it’s YATPBP (Yet Another Twitter Performance Blog Post).
About 10 days ago, I turned GrabPERF loose on Twitter. Now before you accuse this of crippling the service and bringing it to its knees, realize that GrabPERF simply requests a document over HTTP about two times a minute. No additional requests are made for images and [...]

In the GigaOm blog today, Allen Leinwand puts up a monstrous wake-up call to all the hip and cool Web 2.0 companies out there: Your apps run across the Internet [here].
I have spent 9 years investigating, diagnosing, and validating the Web performance issues of companies. I can tear the Web performance data of a site [...]

When FireFox 1.0 was released, the sites hosting this eagerly awaited software effectively were overwhelmed by the number of users attempting to download it.
A colleague of mine referred to it as a Success Failure. What is that? It simply means that you have been so successful at getting the word out and getting people excited [...]

So, Microsoft is releasing Internet Explorer 8 later this year, and a Beta is available now.
The question is, are you ready for it?
Internally, the tech savvy folks (myself included) have been tossing around the football of how to tackle it. The leap from 2 to 6 connections per host, on top of the basic rendering [...]

On type of my usual performance consulting, I have recently taken on the role of Web site breaker/stress tester at work. Our updated external load-testing tool is coming out soon, but we have some clients who need some of its functions now.
So, what does this mean? Well, I have learned a lot about how to [...]

Today’s biggest victim of Black Friday appears to be Sears

Sears measurement data for the last 8 hours can be found here.
UPDATE: It gets worse for Sears.

Technorati Tags:
Grabperf, Sears, Black Friday, Web Performance

Look ma: Macy’s is already too busy.

Yeah. Let the fun begin.
Technorati: GrabPERF “Black Friday” “Web Performance” “Macy’s”

mon.itor.us, a service which also provides free Web performance measurement services, appears to be having a wee problem.

The most recent GrabPERF data on this site is available here. The issue may be corrected by the time you look at the data.
I don’t wish suffering like this on anyone. GrabPERF had it’s own 3-4 day outage [...]

If you use GrabPERF on a regular basis, the somewhat flaky navigation method has become second nature to you. In fact, to circumvent some of the idiosyncrasies, you have probably bookmarked your favourite pages.
Yesterday, I broke your links.
When I redesigned GrabPERF in February 2006, I had just discover the require function in PHP, and decided [...]