Glenn is limiting what aggregators can get from his feeds based on smart logging in an attempt to deal with agents that ignore HTTP 304s.
…my RSS feed from Wi-Fi Networking News (vast majority) is nearly an average of 400 MB per day. But a substantial minority of that is from stupid aggregators that don't check for modifications, but always request the full feed.
400MB? That's a hell of a hit. I'd be tempted to try reducing the size of the feed itself, not by limiting to summaries, rather only publishing say 5 items in the feed. I wonder how often new items appear?
The biggest culprit he lists is "XMission RPC Agent" - a quick
Google doesn't help, I wonder what that could be.
GlennLog: Throttling RSS