If I don't harp on it enough 🙂 I knew I had seen the official KB on this subject long ago, and finally came across it again.
Keep in mind, that even with a MOSS 2007 indexer, indexing SharePoint Portal Server 2003 and Windows SharePoint Services 2.0 sites, this is going to cause the same impact, as the impact/delay comes from the target system. It's not that the indexer is performing badly...It's just that it's waiting on the target to satisfy the data request.
How bad could you possibly be impacted by this? Run SPSiteManager in a level 3 analysis, then look at the various <warning> elements that inform you where you have document libraries, and lists that have exceeded our capacity planning guidelines for Windows SharePoint Services 2.0 and SharePoint Portal Server 2003.
- A sampling of the analysis data from the new version of SPSiteManager
- Windows SharePoint Services Capacity Planning guidelines
- Crawl performance and index performance of SharePoint Portal Server 2003 decrease (Because of exceeding capacity planning guidelines)