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Posted to distributedlog-issues@bookkeeper.apache.org by gi...@git.apache.org on 2017/09/11 03:37:51 UTC
[GitHub] chenbokai commented on issue #183: some confusion about lantency
chenbokai commented on issue #183: some confusion about lantency
URL: https://github.com/apache/distributedlog/issues/183#issuecomment-328407257
Thank you for answer my question.It inspired me that when three bookies run in different processing speed may cause that situation,so i check data. However, bookies processing speed seem like same and they are higher than per_channel_bookie_clients.Here is the data:
"dlwrite.dl.per_channel_bookie_client.192_168_1_41_3181.ADD_ENTRY" : {
"count" : 707932,
"max" : 0.039316404,
"mean" : 7.294639961089494E-4,
"min" : 2.75805E-4,
"p50" : 3.984705E-4,
"p75" : 4.2659500000000004E-4,
"p95" : 7.601880999999999E-4,
"p98" : 8.955364600000001E-4,
"p99" : 0.01701617963000005,
"p999" : 0.03927668229400001,
"stddev" : 0.00278056131831563,
"m15_rate" : 1891.799670421043,
"m1_rate" : 1635.4133239140433,
"m5_rate" : 1752.104374396801,
"mean_rate" : 1818.8154766734172,
"duration_units" : "seconds",
"rate_units" : "calls/second"
},
"dlwrite.dl.per_channel_bookie_client.192_168_1_51_3181.ADD_ENTRY" : {
"count" : 707933,
"max" : 0.041522023000000005,
"mean" : 6.320614114785992E-4,
"min" : 2.9043E-4,
"p50" : 5.07891E-4,
"p75" : 5.4467125E-4,
"p95" : 6.306521E-4,
"p98" : 8.9673956E-4,
"p99" : 9.898051300000009E-4,
"p999" : 0.040984281597000065,
"stddev" : 0.001659605235734714,
"m15_rate" : 1891.9023616719758,
"m1_rate" : 1649.1939141689302,
"m5_rate" : 1758.0522945453104,
"mean_rate" : 1819.096539916557,
"duration_units" : "seconds",
"rate_units" : "calls/second"
},
"dlwrite.dl.per_channel_bookie_client.192_168_1_61_3181.ADD_ENTRY" : {
"count" : 707933,
"max" : 0.038555315,
"mean" : 6.465415389105059E-4,
"min" : 2.7362800000000004E-4,
"p50" : 4.183085E-4,
"p75" : 4.452785E-4,
"p95" : 6.577250999999996E-4,
"p98" : 8.975637999999999E-4,
"p99" : 0.008250984760000094,
"p999" : 0.03834831407300003,
"stddev" : 0.0021840395244698825,
"m15_rate" : 1891.9064686175013,
"m1_rate" : 1649.062855162423,
"m5_rate" : 1757.9963518522115,
"mean_rate" : 1819.0914454770852,
"duration_units" : "seconds",
"rate_units" : "calls/second"
},
"dlwrite.dl.bookkeeper_client.ADD_ENTRY" : {
"count" : 707931,
"max" : 0.013280118,
"mean" : 5.022563307392996E-4,
"min" : 3.6949300000000003E-4,
"p50" : 4.7803300000000005E-4,
"p75" : 5.090157500000001E-4,
"p95" : 5.7123375E-4,
"p98" : 5.973867E-4,
"p99" : 6.266521E-4,
"p999" : 0.012919525446000045,
"stddev" : 4.0124739391973426E-4,
"m15_rate" : 1891.6915529102328,
"m1_rate" : 1574.91892387704,
"m5_rate" : 1726.0401619220734,
"mean_rate" : 1817.5354915211597,
"duration_units" : "seconds",
"rate_units" : "calls/second"
},
But i think it maybe a rough conclusion through judging by mean rate. Is there possible that situation:
A(below average) B(below average) C(above average);then A(below average) B(above average) C(below average) and in turn. So we can't compare both mean rate because bookkeeper_client is always lower than per_channel_bookie_client.
By the way,will there be any performance improvements in the future? I am very much looking forward to seeing it!
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