I'm getting something similar for beta 2, you can see here it's dropping from 12000 to 400 quite quickly. The output from cassandra is available n dropbox here:
https://dl.dropboxusercontent.com/u/1638201/output.txt (184kBytes) I'm wondering if it's a GC issue ? ./cassandra-stress -d 134.36.36.218 -n 30000000 Unable to create stress keyspace: Keyspace names must be case-insensitively unique ("Keyspace1" conflicts with "Keyspace1") total,interval_op_rate,interval_key_rate,latency/95th/99th,elapsed_time 73761,7376,7376,2.1,7.6,181.0,10 199159,12539,12539,2.4,7.5,102.4,20 316978,11781,11781,2.4,7.8,172.7,30 434060,11708,11708,2.4,8.1,170.6,40 552650,11859,11859,2.5,7.3,170.8,50 602432,4978,4978,2.5,7.3,170.8,60 614364,1193,1193,2.5,7.5,5490.4,71 634199,1983,1983,2.5,8.1,5490.4,81 653293,1909,1909,2.5,8.9,5490.4,91 658398,510,510,2.5,8.7,5490.4,101 671805,1340,1340,2.6,8.7,5490.4,111 678677,687,687,2.6,9.1,5490.4,121 685247,657,657,2.6,10.2,5626.8,131 691519,627,627,2.6,10.7,5626.8,141 693682,216,216,2.6,10.7,5626.8,151 700082,640,640,2.7,11.9,6460.1,161 703952,387,387,2.7,12.5,6460.1,172 706007,205,205,2.7,12.5,6460.1,182 709988,398,398,2.7,12.7,6647.0,192 ^Cmacaroon:bin administrator$ Andy C On 25 Jul 2013, at 15:28, Sávio Teles <savio.te...@lupa.inf.ufg.br<mailto:savio.te...@lupa.inf.ufg.br>> wrote: Some bug was fixed in 2.0.0-beta2 by C* developers. Try it! 2013/7/22 Andrew Cobley <a.e.cob...@dundee.ac.uk<mailto:a.e.cob...@dundee.ac.uk>> I've been noticing some strange casandra-stress results with 2.0.0 beta 1. I've set up a single node on a Mac (4 gig ram, 2.8Ghz core 2 duo) and installed 2.0.0 beta1. When I run ./cassandra-stress -d 134.36.36.218 I'm seeing the interval-op-rate drop from a peek of 11562 at the start to 0 -20 after about 358 seconds. Here's the output: The University of Dundee is a registered Scottish Charity, No: SC015096
