[fdo-users] WFS memory usage
robin.newton at 1spatial.com
Mon Aug 15 13:30:54 EDT 2011
I'm looking into a problem in an application using the WFS provider, whereby
if it is trying to process a large number of features it uses a large amount
of memory - even though the application itself only ever needs one top-level
feature to be in memory at a time - resulting in a limit to the size of data
that can be processed without the application crashing. As far as I can
determine, this isn't a leak. This is happing with builds done against 3.2
and 3.6 releases of FDO.
I had a look at the source code: when the IFeatureReader interface is used
to iterate over the available features it only allows access the the current
feature, but it appears to be maintaining a collection of every feature
seen. At least, this was the impression I got from
FdoXmlFeatureReaderImpl::ReadNext - with all the top-level features ending
up in m_featureCollection.
So, the questions I have are:
(a) Am I correct in thinking that it is holding on to every feature
processed by the reader?
(b) If so, is there any way of stopping it from doing this?
View this message in context: http://osgeo-org.1803224.n2.nabble.com/WFS-memory-usage-tp6688451p6688451.html
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