[Solved]-Jython + Django not ready for production?

by

17👍

✅

So as nobody replied, I investigated a bit more and it seems like my problem might have to do with VirtualBox. Using different server OSes (Debian Squeeze, Ubuntu Server), I had similar problems. For example, with simple static file serving, I got this result from the Apache web server (on Debian):

> ab -c50 -n1000 http://ip.of.my.vm/some/static/file.css

Requests per second:    91.95 [#/sec] (mean)    <--- quite impossible for static serving
[...]
Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    2  22.1      0     688
Processing:     0  206 991.4     31    9188
Waiting:        0   96 401.2     16    3031
Total:          0  208 991.7     31    9203

Percentage of the requests served within a certain time (ms)
  50%     31
  66%     47
  75%     63
  80%     78
  90%    156
  95%    781
  98%    844
  99%   9141                            <--- !!!!!!
 100%   9203 (longest request)

This led to the conclusion that (I don’t have a conclusion, but) I think the Java reloading might not be the problem here, rather the virtualization. I will try it on a real host and leave this question unanswered till then.

FOLLOWUP

Now I successfully tested a bare-bones Django site (really just the welcome page) using Jython + AJP over TCP/mod_proxy_ajp on Apache (again with patched flup package). This time on a real host (i7 920, 6 GB RAM). The result proved that my above assumption was correct and that I really should never benchmark on a virtual host again. Here’s the result for the welcome page:

Document Path:          /jython-test/
Document Length:        2059 bytes

Concurrency Level:      40
Time taken for tests:   24.688 seconds
Complete requests:      20000
Failed requests:        0
Write errors:           0
Keep-Alive requests:    0
Total transferred:      43640000 bytes
HTML transferred:       41180000 bytes
Requests per second:    810.11 [#/sec] (mean)
Time per request:       49.376 [ms] (mean)
Time per request:       1.234 [ms] (mean, across all concurrent requests)
Transfer rate:          1726.23 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1   1.5      0      20
Processing:     2   49  16.5     44     255
Waiting:        0   48  16.5     44     255
Total:          2   49  16.5     45     256

Percentage of the requests served within a certain time (ms)
  50%     45
  66%     48
  75%     51
  80%     53
  90%     69
  95%     80
  98%     90
  99%     97
 100%    256 (longest request)   # <-- no multiple seconds of waiting anymore

Very promising, I would say. The only downside is that the average request time is > 40 ms whereas the development server has a mean of < 3 ms.

👤AndiDog

Leave a comment