>
> Hello Erik,
>
> Sorry to interrupt this thread, but the 30-40MB figure mentioned in the OP's
> message triggered a thought here. For what it is worth, we also see
> significant amounts of memory being consumed every request and the figure of
> 30-40MB per request is about what I see too when using a pretty basic
> XForms.
>
> We have two main applications. One which does not use Xforms, but does make
> use of XPL pipelines to process and serve up XML data. The XPL-based
> application also uses more memory per request than I would like, around
> 5-10MB each request. The XPL typically perform a database transaction out to
> MySQL and then apply some XSLT transforms to the data before serializing the
> data via HTTP.
>
> The second app we have is using Xforms, but not currently using Forms
> Builder, just hand-coded XForms. Again, these get their data by querying a
> db, transforming and then displaying in Xforms. The forms themselves. Every
> page request seems to cause about 30-40MB of memory to be consumed.
>
> Both applications are running in Tomcat 6.x with Java 6.x and also connect
> to MySQL 5.x
>
> The consequence of the above is that we are having significant problems
> scaling up the applications.
>
> I appreciate these figures are very anecdotal, but the main point being that
> there is seems to be a huge memory overhead when it comes to serving up the
> XForms pages and to be honest the XPL based app is not great either. I may
> well be being rather naive about the memory management, but it does seem
> really excessive that such huge amounts of memory are being consumed to
> serve up really quite small and simple pages.
>
> I'm hopefully going to be able to do some more profiling soon, as I really
> need to make this more scalable than it is at the moment. However any
> thoughts / experiences about what the most likely causes of the large memory
> use would be helpful and may help tackle this issue which I fear is a major
> disadvantage of the current platform.
>
> Thanks in advance for any help.
>
> Regards,
> Neil
>
>
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>
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