Apachebench请求计数和Node.js脚本计数器不匹配

毫无疑问，我正在做一些愚蠢的事情，但我一直在使用Nerve微框架运行一个简单的node.js应用程序时遇到了问题。 使用apachebench进行testing，似乎我的单一控制器中的代码被调用的频率比应用程序本身的调用频率高。

我已经创build了如下的testing脚本：

'use strict'; (function () { var path = require('path'); var sys = require('sys'); var nerve = require('/var/www/libraries/nerve/nerve'); var nerveCounter = 0; r_server.on("error", function (err) { console.log("Error " + err); }); var app = [ ["/", function(req, res) { console.log("nc = " + ++nerveCounter); }] ]; nerve.create(app).listen(80); }()); 

启动服务器。 从另一个框中运行负载testing：

 /usr/sbin/ab -n 5000 -c 50 http://<snip>.com/ ... Complete requests: 5000 ... Percentage of the requests served within a certain time (ms) ... 100% 268 (longest request) 

但是，节点脚本本身一直打印到：

 nc = 5003 rc = 5003 

换句话说，服务器被调用5000次，但是控制器代码被调用了5003次。

任何想法我做错了什么？

更新

我大大地改变了这个问题的语气和内容，以反映帮助Colum，Alfred和GregInYEG给我意识到问题不在于Redis或Nerve，而可能在于apachebench。

Answer 1

程序：

 const PORT = 3000; const HOST = 'localhost'; const express = require('express'); const app = module.exports = express.createServer(); const redis = require('redis'); const client = redis.createClient(); app.get('/incr', function(req, res) { client.incr('counter', function(err, reply) { res.send('incremented counter to:' + reply.toString() + '\n'); }); }); app.get('/reset', function(req, res) { client.del('counter', function(err, reply) { res.send('resetted counter\n'); }); }); app.get('/count', function(req, res) { client.get('counter', function(err, reply) { res.send('counter: ' + reply.toString() + '\n'); }); }); if (!module.parent) { app.listen(PORT, HOST); console.log("Express server listening on port %d", app.address().port); } 

结论

它在我的电脑上没有任何缺陷：

 $ cat /etc/issue Ubuntu 10.10 \n \l $ uname -a Linux alfred-laptop 2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 01:41:57 UTC 2010 i686 GNU/Linux $ node -v v0.2.6 $ npm install express hiredis redis npm info build Success: redis@0.5.2 npm info build Success: express@1.0.3 npm info build Success: hiredis@0.1.6 $ ./redis-server --version Redis server version 2.1.11 (00000000:0) $ git clone -q [e-mail]:02a3f7e79220ea69c9e1.git gist-02a3f7e7; cd gist-02a3f7e7; node index.js $ #from another tab $ clear; curl http://localhost:3000/reset; ab -n 5000 -c 50 -q http://127.0.0.1:3000/incr > /dev/null; curl http://localhost:3000/count; resetted counter This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking 127.0.0.1 (be patient) Completed 500 requests Completed 1000 requests Completed 1500 requests Completed 2000 requests Completed 2500 requests Completed 3000 requests Completed 3500 requests Completed 4000 requests Completed 4500 requests Completed 5000 requests Finished 5000 requests Server Software: Server Hostname: 127.0.0.1 Server Port: 3000 Document Path: /incr Document Length: 25 bytes Concurrency Level: 50 Time taken for tests: 1.172 seconds Complete requests: 5000 Failed requests: 4991 (Connect: 0, Receive: 0, Length: 4991, Exceptions: 0) Write errors: 0 Total transferred: 743893 bytes HTML transferred: 138893 bytes Requests per second: 4264.61 [#/sec] (mean) Time per request: 11.724 [ms] (mean) Time per request: 0.234 [ms] (mean, across all concurrent requests) Transfer rate: 619.61 [Kbytes/sec] received Connection Times (ms) min mean[+/-sd] median max Connect: 0 0 0.5 0 7 Processing: 4 11 3.3 11 30 Waiting: 4 11 3.3 11 30 Total: 5 12 3.2 11 30 Percentage of the requests served within a certain time (ms) 50% 11 66% 13 75% 14 80% 14 90% 15 95% 17 98% 19 99% 24 100% 30 (longest request) counter: 5000