[Laszlo-dev] Re: [Laszlo-user] Need help troubleshooting
bloch at laszlosystems.com
Thu Jan 20 01:26:42 PST 2005
There is some debugging help here although I don't think it will
immediately help yoiu decipher anything wrong with IIS/Tomcat configs.
First, try to serve up some large files outside that aren't related to
the .lzx stuff. Plop down some images or something big and get them via
your iis+tomcat. If it's bad, then you're beyond my knowledge base. If
that's ok, then it could be something wrong or misconfigured in tomcat
Note that LPS 2.2 proxies your media requests so bandwidth from the
external site *into* LPS is important.
To peak a bit at lps itself, you can use the lps request stats to see if
the lps itself is responding fast or slow.
(returns you an XML document)
best if you turn on url collection before making your requests. You can
do this by editing lps.properties and restarting the webapp or live via
Some of this is in the deployer's chapter of the developer's guide.
You can also turn up the logging to DEBUG and look for timestamps in
lps.log to determine if socket writes are slow, too.
Jon Gilkison wrote:
> I've been developing an application in Laszlo that we're planning on
> pitching to a client in the coming weeks. I've got a prototype chunk
> of it done and locally it works well. It's a very media heavy site,
> so there is a lot of loading of external images from a server.
> The development setup is Windows XP Pro, IIS 5, Tomcat 5.0 with the
> isapi_redirector. The machine is a P4 3.4ghz with 4 gigs of RAM and
> dual 250 gig HD's RAIDed together.
> The staging server setup is Windows 2003 Advanced Server, IIS 6.0,
> Tomcat 5.0 with the isapi_redirector. The machine is a dual P4
> 3.4ghz, 4 gigs of RAM and 2 100 gig platters NOT RAIDed together.
> Both machines are on an internal gigabit network, and the pipe to the
> staging server is enterprise class cable, 3megs up/down asynch.
> Now, if I view the app on the development box, obviously it's blazing
> fast. If I view it from the staging server on the local network, it's
> just as fast. I've used various machines in different configs on the
> local network to make sure the flash interface performance is
> If I view this externally, the LZX stuff loads incredibly slow. I've
> tested the network and IIS remotely and I get great bandwidth from
> both externally (tested by downloading large files, using the ASP.NET
> version of the application, etc.). The bottleneck appears to be
> Tomcat or perhaps the configuration of IIS and Tomcat together.
> We also have an alternate ASP.NET version of the site, and that works
> lickity split and it's loading the same media we load in the Laszlo
> I'm completely confused. This is my first experience with Tomcat,
> being the .NET douche bag I am.
> Please help!
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