NFS Analytics example

I just tracked down a minor performance issue on my desktop in a couple of minutes, and thought it may make a good example to follow as it demonstrates using Analytics along with dtrace, truss, snoop and kstats – really the entire suite of perf tools I regularly use on Solaris. I was downloading a [...]

Posted on November 17, 2009 at 8:00 am by Brendan Gregg · Permalink · One Comment
In: Fishworks · Tagged with: , , ,

Latency Art: X marks the spot

Here is another example of latency art (interesting I/O latency heat maps). This is a screenshot from Analytics on the Sun Storage 7000 series. The configuration was 2 JBODs (48 disks) configured with mirroring, and a single NFS client performing a synchronous write workload (opened with O_DSYNC), from one thread writing 8 Kbyte I/O sequentially. [...]

Posted on June 12, 2009 at 4:32 pm by Brendan Gregg · Permalink · 2 Comments
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Heat Map Analytics

I’ve been recently posting screenshots of heat maps from Analytics – the observability tool shipped with the Sun Storage 7000 series. These heat maps are especially interesting, which I’ll describe here in more detail. Introduction To start with, when you first visit Analytics you have an empty worksheet and need to add statistics to plot. [...]

Posted on March 17, 2009 at 10:00 am by Brendan Gregg · Permalink · 5 Comments
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