Mailing-List: contact users-help@tomcat.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Tomcat Users List" <users@tomcat.apache.org>
Received-SPF: pass (athena.apache.org: domain of lists@nabble.com designates
 216.139.236.158 as permitted sender)
Message-ID: <20996642.post@talk.nabble.com>
Date: Sat, 13 Dec 2008 18:15:33 -0800 (PST)
From: kazukin6 <coolwhiff@mail.ru>
To: users@tomcat.apache.org
Subject: tomcat6, bottleneck, concurrent requests, windows xp
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit


---------------------
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
---------------------

So the question is- is it a some sort of socket level bottleneck?
In JProfiler there is no thread locks shown.
How to resolve it?

====================================================
full log of ab.exe is
====================================================
Concurrency Level:      100
Time taken for tests:   16.656 seconds
Complete requests:      100
Failed requests:        0
Write errors:           0
Total transferred:      2770200 bytes
HTML transferred:       2742700 bytes
Requests per second:    6.00 [#/sec] (mean)
Time per request:       16656.250 [ms] (mean)
Time per request:       166.563 [ms] (mean, across all concurrent requests)
Transfer rate:          162.42 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       31  146 208.0    109    1922
Processing:  1328 8015 4329.2   7797   16250
Waiting:      578 7109 4323.0   6734   15281
Total:       1438 8161 4350.1   7875   16281

Percentage of the requests served within a certain time (ms)
  50%   7875
  66%   9969
  75%  10969
  80%  11609
  90%  15547
  95%  16141
  98%  16219
  99%  16281
 100%  16281 (longest request)
-- 
View this message in context: http://www.nabble.com/tomcat6%2C-bottleneck%2C-concurrent-requests%2C-windows-xp-tp20996642p20996642.html
Sent from the Tomcat - User mailing list archive at Nabble.com.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org