When you move the rate up by 5x, from 1k => 5k, your wait time moves up by 
2846x. That is suspicious in any system, language, etc. ;-)

 

From: <golang-nuts@googlegroups.com> on behalf of Rayland <guianul...@gmail.com>
Date: Monday, July 18, 2016 at 6:03 AM
To: golang-nuts <golang-nuts@googlegroups.com>
Subject: [go-nuts] Understanding HTTP server latencies

 

5k req/s 

Requests      [total, rate]            5000, 4927.80

Duration      [total, attack, wait]    2.400928423s, 1.01465221s, 1.386276213s

Latencies     [mean, 50, 95, 99, max]  1.161943215s, 1.248041144s, 
1.860136828s, 2.047804227s, 2.088889511s

Bytes In      [total, mean]            305000, 61.00

Bytes Out     [total, mean]            450000, 90.00

Success       [ratio]                  0.00%

Status Codes  [code:count]             500:5000

 

1k req/s

Requests      [total, rate]            1000, 1000.88

Duration      [total, attack, wait]    999.611806ms, 999.124863ms, 486.943µs

Latencies     [mean, 50, 95, 99, max]  647.43µs, 531.921µs, 1.380096ms, 
2.26174ms, 4.933884ms

Bytes In      [total, mean]            61000, 61.00

Bytes Out     [total, mean]            90000, 90.00

Success       [ratio]                  0.00%

Status Codes  [code:count]             500:1000

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