Orbeon Forms community mailing list

RE: Re: Slow page load

Posted by wreeder on Dec 07, 2010; 2:40pm
URL: https://discuss.orbeon.com/Slow-page-load-tp2768407p3076482.html

Erik,

We re-factored the page to reduce the page size dramatically, and that helped a lot with performance.

Next we upgraded to the 12/1/2010 nightly build, and found the performance to be about the same. Some pages even load a bit slower. Are there any configuration parameters or xforms options we need to use to realize the improved performance?

Thanks,

Bill

From: Erik Bruchez [via Orbeon Forms (ops-users)] [mailto:ml-node+[hidden email]]
Sent: Thursday, October 07, 2010 11:21 PM
To: Bill Reeder
Subject: Re: Re: Slow page load

Since 3.8.0, we implemented some performance enhancements which might
work for you.

One issue with 3.8.0 was that at each page load for a given page, the
so-called static state of the page was likely to be rebuild, which was
costly. Recent fixes help quite a bit with that with better caching.

Can you give a nightly build a try? We are also going to release some
of them in a PE build soon:

http://wiki.orbeon.com/forms/doc/developer-guide/release-orbeon-forms-381-perf-pe

This said, 20-30 MB per page load is huge and I don't know if this can
be accounted by this issue alone.

-Erik

On Tue, Oct 5, 2010 at 7:00 AM, wreeder <[hidden email]> wrote:

>
> Erik,
>
> The 2 environments are running on identical WebLogic domains on the same
> machine. It is likely that the slow server has more activity than the faster
> server. After more investigation, we found the following:
>
> 1. Every reload of this page caused the heap memory to reduce by about
> 20-30mb. After reloading this page several times, we ran out of heap memory.
> Do you know why memory is not being garbage collected before the JVM crashes
> with an out of heap memory exception? We are using WebLogic 11g with the Sun
> JDK 1.6.0_18 runtime.
>
> 2. This page has logic to dynamically add elements to an instance used to
> display a grid, and from logging, we we a bulk of the time being spent here.
> We will change our logic to fully prepare the instance in an XPL instead of
> in the XForm page and hope this improves the performance.
>
> 3. This page has 2 dialog boxes, requiring different data than the main
> page. We will initialize the instances required for the dialogs with an
> empty template, and will load it on demand when the dialog is loaded first.
> We hope the initial page load will be quicker with this technique.
>
> I'll let you know how this works for us. If you have any other suggestions
> of best practices regarding instance manipulation on a XForm page, I'd
> appreciate your insight.
>
> Thanks,
> Bill
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