I hit the app itself with Apache Benchmark. The speed is fairly bad. This
is a small app which serves everything from memory -- there is no database
to slow things down. I am aware that I made several mistakes with this app.
I had to write it in a huge hurry. I abused the Enlive template system and,
I am fairly sure, there are places where I redundantly change Enlive nodes
to a string, then change them back to Enlive nodes, then change them back
to a string to serve them to the public. I imagine I can get a speed bump
when I go back through and clean it up. But I am still left with the main
puzzle: why does the CSS sometimes fail to load? I know that sometimes
(rarely) if I point my browser directly at the path for the CSS file, I get
a 404 error. What would cause an intermittent problem like that? Some
background exception? What?
ab -n 1000 -c 10
Server Software: Jetty(7.x.y-SNAPSHOT)
Document Path: /
Document Length: 4277 bytes
Concurrency Level: 10
Time taken for tests: 235.877 seconds
Complete requests: 1000
Failed requests: 0
Write errors: 0
Total transferred: 4551891 bytes
HTML transferred: 4277000 bytes
Requests per second: 4.24 [#/sec] (mean)
Time per request: 2358.775 [ms] (mean)
Time per request: 235.877 [ms] (mean, across all concurrent requests)
Transfer rate: 18.85 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 137 139 3.4 138 172
Processing: 1372 2216 280.3 2210 3057
Waiting: 1371 2215 280.3 2210 3057
Total: 1510 2355 280.5 2351 3195
Percentage of the requests served within a certain time (ms)
50% 2351
66% 2470
75% 2558
80% 2610
90% 2734
95% 2828
98% 2914
99% 3008
100% 3195 (longest request)
On Wednesday, February 6, 2013 10:53:50 AM UTC-5, larry google groups wrote:
>
> I logged into my personal server (in the Rackspace cloud, what used to be
> Slicehost) and blasted the CSS file with 10,000 requests. There were 0
> (zero) failed requests. This is with Apache Benchmark ("ab -n 10000 -c
> 50"). The server, Jetty, was able to serve the CSS 10,000 times, yet it
> fails on occasion when my co-workers go and look at it. I am struggling to
> think what the problem is. Any suggestions? Does Jetty fail when the app is
> running an activity in something other than the main thread?
>
>
> Document Path: /css/timeout.css
>
> Document Length: 3688 bytes
>
>
> Concurrency Level: 50
>
> Time taken for tests: 62.913 seconds
>
> Complete requests: 10000
>
> Failed requests: 0
>
> Write errors: 0
>
> Total transferred: 38430000 bytes
>
> HTML transferred: 36880000 bytes
>
> Requests per second: 158.95 [#/sec] (mean)
>
> Time per request: 314.563 [ms] (mean)
>
> Time per request: 6.291 [ms] (mean, across all concurrent requests)
>
> Transfer rate: 596.53 [Kbytes/sec] received
>
>
> Connection Times (ms)
>
> min mean[+/-sd] median max
>
> Connect: 137 154 75.0 143 1241
>
> Processing: 139 160 39.0 152 772
>
> Waiting: 138 160 38.0 152 663
>
> Total: 277 314 86.6 298 1636
>
>
> Percentage of the requests served within a certain time (ms)
>
> 50% 298
>
> 66% 306
>
> 75% 313
>
> 80% 318
>
> 90% 341
>
> 95% 363
>
> 98% 422
>
> 99% 680
>
> 100% 1636 (longest request)
>
>
>
>
>
>
> On Wednesday, February 6, 2013 10:10:25 AM UTC-5, larry google groups
> wrote:
>>
>>
>> I created a web app using Ring, Jetty, Enlive, Compojure.
>>
>> At the end, I bundled everything together by running the command "lein
>> uberjar". The resulting file was 21 megs.
>>
>> I scp the file to the server, then I ssh to the server. I start a
>> "screen" session. Inside the screen session I type :
>>
>> java -jar kiosk-0.1-standalone.jar 30001
>>
>> The number at the end is the port that I have it running on.
>>
>> Sometimes, when people look at the app, none of the CSS files load. I
>> have run into this bug myself. Sometimes, when I look at the app, the
>> Javascript and CSS paths are broken. If I click "view source" and see the
>> source, and if I try to follow the links to the CSS or Javascript, then I
>> get 404 errors.
>>
>> I have this in my code:
>>
>> (wrap-resource "public")
>>
>> The structure of the code is:
>>
>> /resources
>> /public
>> /css
>> /javascript
>> /templates
>> /src
>> /kiosk
>>
>> The code is still able to find the templates in resources/templates, and
>> that HTML is given to Enlive, so something appears on screen. It's just the
>> stuff in "public" that sometimes goes missing.
>>
>> Can anyone suggest why? My routes are defined like this:
>>
>>
>> (defroutes app-routes
>> (ANY "/" request (index request))
>> (GET "/search-results" request (search-results request))
>> (GET "/schema" [] (schema))
>> (GET "/account" request (account request))
>> (GET "/login" request (login request))
>> (GET "/start-over" request (start-over request))
>> (GET "/admin" request (admin request))
>> (GET "/ok" request (ok request))
>> (POST "/admin" request (record-new-question-if-any request))
>> (GET "/delete-question/:question-to-delete" request (delete-question
>> request))
>> (GET "/finish-user-sign-up" request (finish-user-sign-up request))
>> (route/not-found "Page not found"))
>>
>> (def app
>> (-> app-routes
>> (wrap-resource "public")
>> (wrap-session {:cookie-name "discovery-session" :cookie-attrs
>> {:max-age 90 }})
>> (wrap-cookies)
>> (wrap-keyword-params)
>> (wrap-nested-params)
>> (wrap-params)))
>>
>>
>>
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