We are running incremental crawls on our SP2007 environment. There are around 3.2 million crawled items in the content source.
When we run a incremental crawl everyday, it takes an average of 17 hours to complete. Each incremental crawls adds only few thousand items to the crawled content.Why would few thousand items take 17 hours to complete everyday?
What could be the reasons for the incremental crawls to take this long to complete? Are there any ways to reduce the time taken to complete incremental crawls?