Cache Miss Storm

MySQL Performance Blog

I worked on the problem recently which showed itself as rather low MySQL load (probably 5% CPU usage and close to zero IO) would spike to have hundreds instances of threads running at the same time, causing intense utilization spike and server very…

11 September 2010

iOS 4.1 restores limited Field Test mode

MacOSXHints.com

In older versions of the iPhone OS software, it was possible to enter Field Test mode to get a lot of useful data about the cellular connection. This capability was removed in iOS 4.0, and caused some angst while trying to examine the iPhone 4 antenna…

10 September 2010

Windows and Mac OS X (Snow Leopard) builds

Planet Mozilla

Windows and Mac OS X (Snow Leopard) daily builds of BlueGriffon are now available monday-friday at 1pm french local time here. Build and push to the web site are automated so it will never be guaranteed that builds are fully functional or even don't crash…

10 September 2010

GNU Parallel 20100906 released

Planet GNU

GNU Parallel 20100906 has been released. It is available for download at: http://ftp.gnu.org/gnu/parallel/ New in this release: * Using --shebang GNU Parallel can be used as the parser for a script. E.g: #!/usr/bin/parallel --shebang traceroute…

6 September 2010

iTerm 2 in early development

TUAW - The Unofficial Apple Weblog

Power users of the command-line are no doubt familiar with iTerm, the free replacement terminal application. iTerm has been the go-to alternative for people who wanted tabbed windows and other advanced features. Development of iTerm has been fairly slow…

3 September 2010

Set up your own Priority Inbox with Apple's Mail

TUAW - The Unofficial Apple Weblog

Last month, Google released Priority Inbox, a system that learns which messages are the most important to you and highlights them automatically over time. It's in beta right now and Google is slowly turning it on for its users. If you're tired of waiting,…

2 September 2010

How long Innodb Shutdown may take

MySQL Performance Blog

How long it may take MySQL with Innodb tables to shut down ? It can be quite a while. In default configuration innodb_fast_shutdown=ON the main job Innodb has to do to complete shutdown is flushing dirty buffers. The number of dirty buffers in the…

2 September 2010

Introducing tcprstat, a TCP response time tool

MySQL Performance Blog

Ignacio Nin and I (mostly Ignacio) have worked together to create tcprstat[1], a new tool that times TCP requests and prints out statistics on them. The output looks somewhat like vmstat or iostat, but we’ve chosen the statistics carefully so you can…

1 September 2010

iPhone App In App Store Limbo Open Sourced

Slashdot

recoiledsnake writes "The author of iPhone prototyping tool Briefs has decided to open source it after the App store submission has been in limbo for over three months. The app had got into trouble for what Apple believes is being able to run interpreted…

30 August 2010