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Ben Ricker wrote:
>
> ----------------------------------------------------------------
> BEFORE YOU POST, search the faq at <http://java.apache.org/faq/>
> WHEN YOU POST, include all relevant version numbers, log files,
> and configuration files. Don't make us guess your problem!!!
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>
> > JServ is slower than JWS to run servlets. JWS doesn't have the processes
> > switch + TCP connection overhead due to the n-tier model of JServ.
> > But speed is not scalability.
> > and I had one year ago benchmarks results to hit a servlet that updated
> > a RDBMS of 0.012 sec with JServ on a E450 . Far from your 3 seconds, but
> > it was on a real OS, with real tools.
>
> So, you are saying that the difference between JWS and Jserv would only be
> very small?
0.012 sec was not a difference but an elapsed time (measured by the
client).
The difference would be smaller and smaller as the servlets get more
complicated.
> That is, the seconds difference I am seeing may not be due to
> the Jserv overhead of process switching and TCP connection?
Sure. Not 3 seconds. could be expensive logging, network problems,
firewall rules, DNS reverse resolution, authentication, CPU eater
thread, sessions hashtable size, synchronized... or database
configuration.
or Apache configuration (startservers, minspare, maxspare).
The difference
> you seem to suggest in your benchmark above (as far as I understand it) is
> no more than 1/100th of a second. That is not very much of a difference to
> explain the rather large difference exhibited by my setup. Hmmmm.....
>
> Ben Ricker
> US-Rx, Inc.
on a Pentium 120MHz, 48M RAM, JDK1.1.7, Linux 2.0.36 I get these results
with a simple servlet :
[root@r26m24 etc]# /usr/local/apache/bin/ab -n 1 -c 1
http://localhost/servlets/SnoopServlet
This is ApacheBench, Version 1.3c <$Revision: 1.38 $> apache-1.3
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd,
http://www.zeustech.net/
Copyright (c) 1998-1999 The Apache Group, http://www.apache.org/
Server Software:
Apache/1.3.12
Server Hostname: localhost
Server Port: 80
Document Path: /servlets/SnoopServlet
Document Length: 769 bytes
Concurrency Level: 1
Time taken for tests: 0.082 seconds
Complete requests: 1
Failed requests: 0
Total transferred: 943 bytes
HTML transferred: 769 bytes
Requests per second: 12.20
Transfer rate: 11.50 kb/s received
Connnection Times (ms)
min avg max
Connect: 2 2 2
Processing: 77 77 77
Total: 79 79 79
[root@r26m24 etc]#
Nb: this Pentium 120 is running Apache + JServ + Tomcat + LDAP + MySQL +
lots of useful things :-)
Do you want to exchange it with your dual PIII 650 ? I'm all for it :)
Jean-Luc
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