They are beautiful Andy. Put them on our home page? St.Ack
On Sat, Jun 21, 2014 at 2:15 PM, Andrew Purtell <[email protected]> wrote: > I was testing 0.98.4-SNAPSHOT with YCSB on a small testbed for HBASE-11297 > and took a small detour to try out collection and processing of Brendan > Gregg's Java flame graphs ( > http://www.brendangregg.com/blog/2014-06-12/java-flame-graphs.html) They > seemed to turn out well. I want to look at them more closely next week. > > For your viewing enjoyment. > > Traces were collected from the usual experiment, a 5 slave cluster with 5 > concurrent YCSB clients generating a target aggregate load of 100,000 > ops/second. Each RegionServer has 8 GB of heap and bucket cache enabled > backed by 24 GB of off heap memory. The test table schema is all defaults > except I turned on FAST_DIFF block encoding because I was also curious > about its CPU usage profile (along with that of the bucket cache). One > RegionServer was instrumented with Jeremy Manson's lightweight accurate > Java profiler, with the kMaxStackTraces and kMaxFramesToCapture options in > src/globals.h changed to 100000 and 128, respectively, out of pessimism and > expectations for the running time of the experiment. > > Workload A: https://db.tt/oTqTmGIE > Workload B: https://db.tt/jy3E5fh3 > Workload C: https://db.tt/yFxgKROq > Workload D: https://db.tt/36Ux659r > Workload E: https://db.tt/Or2UuTKi > Workload F: https://db.tt/4Wud5il4 > > For more information on flame graphs and how to read them, see > > http://www.slideshare.net/brendangregg/blazing-performance-with-flame-graphs > > > > -- > Best regards, > > - Andy > > Problems worthy of attack prove their worth by hitting back. - Piet Hein > (via Tom White) >
