测试node_redis基准,它显示 incr 有超过 100000 ops/s
$ node multi_bench.js
Client count: 5, node version: 0.10.15, server version: 2.6.4, parser: hiredis
INCR, 1/5 min/max/avg/p95: 0/ 2/ 0.06/ 1.00 1233ms total, 16220.60 ops/sec
INCR, 50/5 min/max/avg/p95: 0/ 4/ 1.61/ 3.00 648ms total, 30864.20 ops/sec
INCR, 200/5 min/max/avg/p95: 0/ 14/ 5.28/ 9.00 529ms total, 37807.18 ops/sec
INCR, 20000/5 min/max/avg/p95: 42/ 508/ 302.22/ 467.00 519ms total, 38535.65 ops/sec
然后我用http服务器在nodejs中添加redis
var http = require("http"), server,
redis_client = require("redis").createClient();
server = http.createServer(function (request, response) {
response.writeHead(200, {
"Content-Type": "text/plain"
});
redis_client.incr("requests", function (err, reply) {
response.write(reply+'\n');
response.end();
});
}).listen(6666);
server.on('error', function(err){
console.log(err);
process.exit(1);
});
使用ab命令测试,只有6000 req/s
$ ab -n 10000 -c 100 localhost:6666/
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 localhost (be patient)
Completed 1000 requests
Completed 2000 requests
Completed 3000 requests
Completed 4000 requests
Completed 5000 requests
Completed 6000 requests
Completed 7000 requests
Completed 8000 requests
Completed 9000 requests
Completed 10000 requests
Finished 10000 requests
Server Software:
Server Hostname: localhost
Server Port: 6666
Document Path: /
Document Length: 7 bytes
Concurrency Level: 100
Time taken for tests: 1.667 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Total transferred: 1080000 bytes
HTML transferred: 70000 bytes
Requests per second: 6000.38 [#/sec] (mean)
Time per request: 16.666 [ms] (mean)
Time per request: 0.167 [ms] (mean, across all concurrent requests)
Transfer rate: 632.85 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 0 0.3 0 2
Processing: 12 16 3.2 15 37
Waiting: 12 16 3.1 15 37
Total: 13 17 3.2 16 37
Percentage of the requests served within a certain time (ms)
50% 16
66% 16
75% 16
80% 17
90% 20
95% 23
98% 28
99% 34
100% 37 (longest request)
最后我测试“hello world”,它达到了 7k req/s
Requests per second: 7201.18 [#/sec] (mean)
如何分析和找出http中的redis失去一些性能的原因?