Friday Jun 29, 2007

Open-Sourcing of Solaris Cluster

Great to see Solaris Cluster starting down the open-source road.[Read More]

Tuesday Feb 06, 2007

Solaris - measuring the memory overhead of my process


What's the memory overhead of my Solaris process?

I'd like to know the amount of additional system memory required when my process is running. It sounds like a simple request, but standard tools like ps, prstat, top and ps don't give me the information... here's how I currently go about measuring the memory overhead of my processes.
[Read More]

Thursday Jan 25, 2007

Sun Connection - updating my lab

Sun's got a pretty neat service - Sun Connection - that lets you monitor a lab full of machines, and helps you decide to apply security  and other patches to the boxes, from a centralized portal. This is much cooler than having to do operations on a machine-by-machine basis when you've a group of machines to administer. This isn't my typical day job, but I wanted to have a try.[Read More]

Monday Jan 15, 2007

DTrace - (ab)using aggregations to expose other data

One restriction when using the Java DTrace API is that the only data type that can be collected on demand by a DTrace client is the aggregation.[Read More]

Friday Oct 20, 2006

DTrace and moving/rolling averages

A client asked me the other day if DTrace could be used to maintain a moving average...

DTrace has very powerful built-in support for various kinds of aggregations, including the support for maintaining an average value, But it doesn't have direct support for maintaining a moving average. Here's how to do it...[Read More]

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nickstephen

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