During a dirty shutdown, the property cache may become corrupted. During startup after a dirty shutdown, a consistency check is performed on the property cache and if any problems are detected, they are fixed. However, some irreparable inconsistencies may occur. In that case, all existing index data is thrown out and documents automatically re-index. Please see the Error Detection and Recovery page for more information.
Events are written to the event log when a recovery operation is performed on the property cache.
The addition of a new registry parameter greatly reduces the chances of a corrupt property cache. For details about how to fine tune this feature, see PropertyStoreBackupSize on the “Main Registry Parameters” page.