I have this in log. What are this swapfile clashes that are being avoided? why they are being avoided... 2009/09/23 19:42:53| 2166281 Entries scanned 2009/09/23 19:42:53| 0 Invalid entries. 2009/09/23 19:42:53| 0 With invalid flags. 2009/09/23 19:42:53| 1455120 Objects loaded. 2009/09/23 19:42:53| 0 Objects expired. 2009/09/23 19:42:53| 0 Objects cancelled. 2009/09/23 19:42:53| 83 Duplicate URLs purged. 2009/09/23 19:42:53| 711073 Swapfile clashes avoided.