Information on the Examine settings section
Since the majority of Examine configuration takes place in code, this section is small and contains only one setting to change: LuceneDirectoryFactory. This setting allows you to change the behavior of the ExamineIndexes directory.
This section has a default value, and does not need to be configured, configuring Examine might look something like this:
This is how Examine is configured by default. There is three different types of Lucene directory factories:
Default - The index will operate from the default location: umbraco/Data/TEMP/ExamineIndexes
SyncedTempFileSystemDirectoryFactory - The index will operate on a local index created in the processes %temp% location and will replicate back to main storage in umbraco/Data/TEMP/ExamineIndexes
TempFileSystemDirectoryFactory - The index will operate only in the processes %temp% directory location