Looks like you found the culprit! All those suggestions sound good. Melanie
On 27 Mar 2014, at 17:03, Oren Hurvitz <or...@kitely.com> wrote: When a prim is a Sculptie or Mesh, the prim's shape contains a field called SculptData which stores the full mesh or texture (for sculpties). If the prim is serialized then the field "SculptData" is also serialized, which is a problem because it contains the entire contents of the mesh or texture. This makes actions such as detaching a mesh attachment extremely slow. I think that we should remove SculptData from the serialized XML format of prims. This means that we'll stop serializing it, and when we get an XML with SculptData we'll ignore it. See also: http://opensimulator.org/mantis/view.php?id=7038 ("Unwearing mesh attachments very slow"). As far as I can tell, the shape's SculptData field (in memory) should usually be empty. It only needs to be filled with the asset data in two cases: 1. When the mesh is first uploaded 2. If the Physics system needs to create a physics mesh In both cases, after the mesh data has been used it should be cleared immediately, to save memory. Regarding the behavior of the physics system, I see a few things that could be a problem with the way it's currently implemented. What currently happens is this: ODEPrim.CheckMeshAsset() loads the mesh/sculptie data if it's needed. Later, Meshmerizer.CreateMeshFromPrimMesher() clears the data once it has finished using it. This raises a couple of questions: 1. Where does BulletSim load the mesh data? It doesn't use ODEPrim. 2. It looks like Meshmerizer.CreateMeshFromPrimMesher() can sometimes return early, without clearing the mesh data. Seems to me that it should always clear it. So besides removing "SculptData" from the XML format of prims, I also want to make Meshmerizer clear the data more aggressively. And I don't know how BulletSim uses meshes, but perhaps it also needs to be changed. Thoughts? Oren -- View this message in context: http://opensim-dev.2196679.n2.nabble.com/Stop-saving-SculptData-in-serialized-SceneObjects-tp7579079.html Sent from the opensim-dev mailing list archive at Nabble.com. _______________________________________________ Opensim-dev mailing list Opensim-dev@lists.berlios.de https://lists.berlios.de/mailman/listinfo/opensim-dev _______________________________________________ Opensim-dev mailing list Opensim-dev@lists.berlios.de https://lists.berlios.de/mailman/listinfo/opensim-dev
