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kekshd / keks

an elearning system with basic answer types yes/no/matrix
http://keks.uni-hd.de
ISC License
10 stars 4 forks source link

mediocre performance on almighty-bob #68

Closed breunigs closed 11 years ago

breunigs commented 11 years ago

simply clicking "los geht's" on KeKs-production currently takes 10s to load the questions for my account. This is unacceptable.

I’m not sure why it takes that long. Even without the patches in f56c8d28757d303c609c, execution time was max. 1s locally. The server shouldn’t take 10 times that.

breunigs commented 11 years ago

I’m down to < 300ms locally. Will have to test this on production once upgrading to the new version.

breunigs commented 11 years ago

Connection Times (ms)

                      min  mean[+/-sd] median   max
concurrency=1:        199  277  47.8    281     452   (home)
concurrency=2:        223  302  57.0    294     566   (home)
concurrency=2:        184  258  34.0    241     336   (uni internal)

The round trip times aren’t that great, being around 300ms. #83 (82b0a63) has increased the pressure to be fast and we miss the “appears instant” goal by about 200ms. Not yet sure why a more powerful machine takes longer to process the requests. The good news is that increased concurrecy does not really hurt the results.

breunigs commented 11 years ago

latest patches brought down the time from 122ms to 107ms locally (when caches are primed that is, i.e. no admin/reviewer change has been made in the mean time)

breunigs commented 11 years ago

Connection Times (ms)

                      min  mean[+/-sd] median   max
concurrency=1:        184  246  56.9    240     463   (home)
concurrency=2:        187  252  35.7    265     340   (home)
concurrency=2:        108  180  25.9    185     228   (uni internal)

i.e. down by about ~50ms compared to the last iteration. The official version has been updated.

breunigs commented 11 years ago

I believe this has been improved to a reasonable low amount. I have about ~200ms at home and much of those 200ms are outside of my control. Please create new tickets if you find any pages that are particularily slow.