Could you please post a code snippet so that I can see how you
[mailto:webware-discuss-admin@...] On Behalf Of
Sent: Sunday, July 27, 2003 4:13 AM
Subject: [Webware-discuss] Performance Concern
> Date: Sat, 26 Jul 2003 21:10:07 -0500
> From: Randall Smith <randall@...>
> I have a servlet that takes input and sends an email using smtplib.
> Today I had network trouble so it could not connect to the mail
> server. The servlet would try for about 30 or so seconds to connect
> before it failed. While it was attempting to connect, !!!no other
> servlets would respond!!! As soon as it finished, they responded. My
> app is not in production yet, but this looks like a potential hangup.
> Does this behavior sound reasonable for webkit?
> My understanding is that servlets fill requests in serial and that two
> or more different servlets should be able to fill requests at the same
> time. Is this correct? If so, then I may need to reconfigure my
> application because it seems that only one servlet can respond at one
> The serial thing raises another issue. I have been building my
> application with a controller(Index.py) that receives all requests and
> directs them (self.forward()) to the appropriate servlet. It makes my
> program feel more like an application than a pile of scripts. Anyway,
> I'm beginning to think that my application will only be able to serve
> one request at a time becuase every requests goes to Index.py before
> it is forwarded.
I used to have a similar problem at http://zunzun.com, where a large
data set would take a lo-o-o-o-ong time to surface fit using nonlinear
methods. Originally I served requests serially as well, so everyone
using the site had to wait until the larger data sets completed.
I solved the problem by multithreading my application using WebKit's
threads. Multiple users can have their requests served simultaneously,
and I have a status page refreshing every two seconds using another
servlet that checks the long-running thread's progress. To see this in
action try running the function finders on my site.
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