Brendan Gregg on Revealing Hidden Latency Patterns

May 21, 2013 - by rachelbalik

A crucial problem in understanding latency - or response time - is that most presentations of latency data aren’t detailed enough. Frequently, the most important information is hidden, a problem that can be solved with heat maps. While a few analytics tools include heat maps, Brendan Gregg, Lead Performance Engineer at Joyent, found there were times when he wanted to convert a separate trace output into a heat map.

He’s solved this problem from himself (and incidentally, the rest of us) by writing, which will generate interactive SVGs. Joyent’s Cloud Analytics has built-in heat maps ready to use, in real time, with low overhead, that are production-ready, but for those looking to try these separately, Brendan has written a full blog post on the DTrace blog on Revealing Hidden Latency Patterns. It serves as a tutorial for understanding and implementing heat maps and also offers insight on using heat maps in production. Read it here while it’s still hot.*

*Brendan Gregg is not responsible for and does not endorse any bad puns that appear on the Joyent blog, or anywhere else on the web.

Sign up Now For
Instant Cloud Access

Get Started