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Archive for the ‘GrabPERF’ Category
GrabPERF Maintenance – March 5 2009
In: GrabPERF
5 Mar 2009Today we undertook two maintenance and upgrade tasks at GrabPERF that have been neglected for too long.
The Agent code was streamlined and removed the connection error sub-routine. It seems that the latest versions of cURL no longer support the connection error determination (I can only imagine the madness of trying to support this on multiple [...]
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- Tags: cURL, GrabPERF, GrabPERF.org
GrabPERF Retail Web Performance Index
4 Mar 2009The GrabPERF Retail Web Performance Index is an extension of the Holiday Performance Index created for the Black Friday/Cyber Monday craze in 2008.
There is a methodology statement explaining more about the index below the data table.
Please add any comments or questions to this post.
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GrabPERF now using MySQL 5.1
In: GrabPERF| Technology| The Web| Web Performance| WebPerformance.Org
3 Mar 2009On the weekend, I upgraded the database engine for GrabPERF to Mysql 5.1 and switched the main data table from MyISAM to InnoDB.
The switch to InnoDB was done because of the locking issues that were occurring during long queries, especially when doing ad-hoc analysis. The row-level (versus table-level) locking of InnoDB has removed most of [...]
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- Tags: GrabPERF, InnoDB, MyISAM, mysql
GrabPERF: What and Why
1 Dec 2008Why GrabPERF?
About four years ago, I had a bright idea that I would like to learn more about how to build and scale a small Web performance measurement platform. I’ve worked in the Web performance industry for nearly a decade now, and this was an experimental platform for me to examine and encounter many of [...]
Introduction to the Series
This is the first of a four-part series focusing on the reasons why companies measure their Web performance. This perspective is substantially different than ones posited by others in the field as they focus on the meat and potatoes reasons, rather than the sometimes more difficult to imagine future effects that measurement [...]
The GrabPERF Black Friday Dashboard is done for another year and there were two performance victims that suffered the most at the hands of the onslaught of bargain-hunters in the area of Web performance.
Some caveats that I need to mention about the GrabPERF measurement methodology.
Only the base HTML file of each site is measured.
Only the [...]
GrabPERF: FiOS and BitTorrent – Don’t Play Nice
13 Nov 2008I fired up the Boston FIoS measurement location today after a couple of days off, and found that suddenly FIoS doesn’t like the BitTorrent.
The line of purple dots all indicate measurements that reported an error code. All of those measurements come from Boston FiOS. See the real-time graph here.
Accident? Design? That I cannot comment on. [...]
GrabPERF Network Outage
In: GrabPERF
22 Sep 2008Today, there was a network outage that affected the servers from September 21 2008 15:30 GMT until September 22 2008 01:45 GMT.
The data from this period has been cut and hourly averages have been re-calculated.
We apologize for the inconvenience.
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- Tags: GrabPERF, outage
In 2004-2005, as a lark, I created my own Web performance measurement system, using PERL, PHP and MySQL. In August 2005, I managed to figure out how to include remote agents.
I dubbed it…GrabPERF. An odd name, but an amalgamation of “Grab” and “Performance” that made sense to my mind at the time. I also never [...]
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- Tags: Argentina, Asia-Pacific, Bangladesh, Boston, cable modem, Central Europe, Germany, GrabPERF, GrabPERF.org, India, internet performance measurement data, Linux, mysql, operating systems, Pakistan, performance measurement, Perl, PHP, Polska, Portugal, San Francisco, United Kingdom, Washington DC, web, Web Performance, Web performance measurement data, Web performance measurement system
GrabPERF: State of the System
In: GrabPERF| The Web| Web Performance| Work
4 Sep 2008This is actually a short post to write, as the state of the GrabPERF system is currently very healthy. There was an eight-hour outage in early August 2008, but that was a fiber connectivity issue, not a system issue.
Over the history of ther service, we have been steadily increasing the number of measurements we take [...]
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- Tags: GrabPERF