Question

我有一个包含~100个文档的小集合的MongoDB。我想一次性返回所有文件〜50KB（使用Node和Mongoose）

Items.find().stream().pipe(JSONStream.stringify(false)).pipe(res);

将ApacheBench与此命令一起使用

ab -r -n 100 -c 10 http://127.0.0.1:8080/api/stress

我得到了这个结果

Document Path:          /api/stress
Document Length:        52866 bytes

Concurrency Level:      10
Time taken for tests:   5.738 seconds
Complete requests:      100
Failed requests:        0
Total transferred:      5308266 bytes
HTML transferred:       5286600 bytes
Requests per second:    17.43 [#/sec] (mean)
Time per request:       573.783 [ms] (mean)
Time per request:       57.378 [ms] (mean, across all concurrent requests)
Transfer rate:          903.45 [Kbytes/sec] received

Connection Times (ms)
            min  mean[+/-sd] median   max
Connect:        0    0   0.3      0       1
Processing:   312  558  95.5    562     853
Waiting:       20  305 118.9    303     527
Total:        312  558  95.6    562     854

Percentage of the requests served within a certain time (ms)
50%    562
66%    582
75%    605
80%    626
90%    670
95%    715
98%    822
99%    854
100%    854 (longest request)

Document Path:          /api/stress
Document Length:        52866 bytes

Concurrency Level:      10
Time taken for tests:   5.738 seconds
Complete requests:      100
Failed requests:        0
Total transferred:      5308266 bytes
HTML transferred:       5286600 bytes
Requests per second:    17.43 [#/sec] (mean)
Time per request:       573.783 [ms] (mean)
Time per request:       57.378 [ms] (mean, across all concurrent requests)
Transfer rate:          903.45 [Kbytes/sec] received

Connection Times (ms)
            min  mean[+/-sd] median   max
Connect:        0    0   0.3      0       1
Processing:   312  558  95.5    562     853
Waiting:       20  305 118.9    303     527
Total:        312  558  95.6    562     854

Percentage of the requests served within a certain time (ms)
50%    562
66%    582
75%    605
80%    626
90%    670
95%    715
98%    822
99%    854
100%    854 (longest request)

每秒请求次数：17.43（看起来太少了。）

返回10条记录时

Notes.find().limit(10).stream().pipe(JSONStream.stringify(false)).pipe(res);

每秒请求次数：146.53（女巫似乎很好。）

所以我想知道，我是在解释数据错误还是我做错了什么？因为我期望通过从MongoDB返回更多的数据来获得更好的性能。

我正在使用带有Node和Mongo localy的本地Windows机器（i7 / 8GB）

Answer 1

在20ms内返回100个查询文档，在2ms内返回10个结果，然后由Node完成一些工作，总共100行，每个请求50ms，每秒给我20个请求。不是很好，但我想我现在必须处理它..

性能不佳（从MongoDB提供数据的Node.js）

1 个答案: