kazukin6 schrieb am 13.12.2008 um 18:15:33 (-0800):
> 1) there is maxThreads=100 in context.xml
> 2) sending 100 simultaneous requests to one servlet, for example ab.exe -n
> 100 -c 100 {address}
> 3) in the servlet's own log for performance it shows around only 200-500 ms
> per request
> 4) in the ab.exe log it shows around 7 seconds(!) per request
It doesn't, at least not in the log you're showing here.
> full log of ab.exe is
> ====================================================
> Concurrency Level: 100
> Time taken for tests: 16.656 seconds
That's the time taken altogether.
> Complete requests: 100
> Failed requests: 0
> Write errors: 0
Everything fine.
> Total transferred: 2770200 bytes
> HTML transferred: 2742700 bytes
> Requests per second: 6.00 [#/sec] (mean)
> Time per request: 16656.250 [ms] (mean)
This is the total time divided by, well, "request": You have only one
request in this sense, because you send all of your total 100 requests
in parallel. To verify, try:
ab -n 100 -c 10 http://localhost/
That should get you about a tenth of the time taken altogether.
> Time per request: 166.563 [ms] (mean, across all concurrent requests)
> Transfer rate: 162.42 [Kbytes/sec] received
Michael Ludwig
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