Hi Pagees, I've been looking into the problem of memory growth in the new rev of the DatabasePager and I've tracked the problem down to the new mechanism of attached DatabaseRequest's via a ref_ptr<> to PagedLOD/ProxyNode nodes. The DatabaseRequest themselves had a ref_ptr<> which creates a circular reference.
Normally the DatabasePager manually breaks the circular reference during its normal operations, so most of the time no leak occurs. However, if the view is moving quickly then old tiles will get expired and removed from the scene graph, and if these tiles have had a previous file request made for them then the circular reference is never broken and leak occurs. The solution was to introduce an observer_ptr<> into DatabaseRequest instead of a ref_ptr<>. This change has meant that the code that relies on this pointer now has to be more careful as it now has to handle instances where the pointer becomes null, but this is small addition that is easy to add. I'm currently testing the new code thoroughly, and will clean it up and check it in next half an hour. This means that this fix will make it into the 2.5.1 dev release that'll I'll make this afternoon. Robert. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
