zjflike opened a new issue #184: some confusion about bookkeeper performance
URL: https://github.com/apache/distributedlog/issues/184
 
 
   
   **QUESTION**
   
   I have tested two different bookkeeper, which is bookkeeper 4.3.4-TWTTR and 
the new bookkeeper 4.5.0. I find out bookkeeper 4.5.0 has a worse performance 
compared with bookkeeper 4.3.4-TWTTR, and here is my test report:
   
   in bookkeeper 4.3.4-TWTTR:
   > "bookkeeper_server.ADD_ENTRY" : {
         "count" : 3425445,
         "max" : 7.41E-4,
         "mean" : 4.579571984435798E-5,
         "min" : 3.0E-5,
         "p50" : 4.4000000000000006E-5,
         "p75" : 4.6E-5,
         "p95" : 5.254999999999996E-5,
         "p98" : 5.741999999999996E-5,
         "p99" : 8.371000000000004E-5,
         "p999" : 7.353740000000008E-4,
         "stddev" : 3.2124531013854395E-5,
         "m15_rate" : 835.1689420800385,
         "m1_rate" : 648.1885926153338,
         "m5_rate" : 826.3971430083111,
         "mean_rate" : 495.75097584866603,
         "duration_units" : "seconds",
         "rate_units" : "calls/second"
       }
   
   in bookkeeper 4.5.0:
   > "bookkeeper_server.ADD_ENTRY" : {
         "count" : 1989593,
         "max" : 8.550560000000001E-4,
         "mean" : 6.543760311284048E-5,
         "min" : 3.1085000000000005E-5,
         "p50" : 5.8833000000000004E-5,
         "p75" : 6.157950000000001E-5,
         "p95" : 7.241495E-5,
         "p98" : 9.612595999999987E-5,
         "p99" : 4.2929724000000005E-4,
         "p999" : 8.536968280000003E-4,
         "stddev" : 5.917626043631808E-5,
         "m15_rate" : 830.11667426358,
         "m1_rate" : 349.7475662441205,
         "m5_rate" : 669.5704800826474,
         "mean_rate" : 178.61990685543887,
         "duration_units" : "seconds",
         "rate_units" : "calls/second"
       }
   
   The above results are tested from same config(MSG_SIZE=256, MAX_RATE=40000). 
Is there anyone meet this question? Or what cause a worse performance?Can 
someone explain that?
   Thank you very much and forgive my pool English ^_^
 
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