Only force prim persistence before delete if the prim is the result of an unpersisted delink

This considerably improves delete performance for objects with large linksets

1 files changed, 13 insertions, 2 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 4ec530e..f17fb28 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -119,10 +119,19 @@ namespace OpenSim.Region.Framework.Scenes
                         timeFirstChanged = DateTime.Now.Ticks;
                 }
                 m_hasGroupChanged = value;
+                
+//                m_log.DebugFormat(
+//                    "[SCENE OBJECT GROUP]: HasGroupChanged set to {0} for {1} {2}", m_hasGroupChanged, Name, LocalId);
             }
 
             get { return m_hasGroupChanged; }
         }
+        
+        /// <summary>
+        /// Has the group changed due to an unlink operation?  We record this in order to optimize deletion, since
+        /// an unlinked group currently has to be persisted to the database before we can perform an unlink operation.
+        /// </summary>
+        public bool HasGroupChangedDueToDelink { get; private set; }
 
         private bool isTimeToPersist()
         {
@@ -1330,6 +1339,7 @@ namespace OpenSim.Region.Framework.Scenes
                         backup_group.RootPart.AngularVelocity = RootPart.AngularVelocity;
                         backup_group.RootPart.ParticleSystem = RootPart.ParticleSystem;
                         HasGroupChanged = false;
+                        HasGroupChangedDueToDelink = false;
 
                         m_scene.EventManager.TriggerOnSceneObjectPreSave(backup_group, this);
                         datastore.StoreObject(backup_group, m_scene.RegionInfo.RegionID);
@@ -2208,8 +2218,9 @@ namespace OpenSim.Region.Framework.Scenes
 
             linkPart.Rezzed = RootPart.Rezzed;
 
-            //HasGroupChanged = true;
-            //ScheduleGroupForFullUpdate();
+            // When we delete a group, we currently have to force persist to the database if the object id has changed
+            // (since delete works by deleting all rows which have a given object id)
+            objectGroup.HasGroupChangedDueToDelink = true;
 
             return objectGroup;
         }