I have seen some severe performance issues with my oracle blogs aggregator recently which I have finally tracked down last night and made some changes for this evening. I use the http://lilina.sourceforge.net/ - (broken link) lilina RSS feed aggregator for my Oracle blogs aggregator, it uses in turn the MagpieRSS code which includes cache features. I found the issue was that the cache was not being honoured. I have set the cache refresh time to one hour, I may extend it out further and fixed the core issue and now the page reloads much faster. it is even faster in the default configuration of 24 hours. If you choose week from the top menu then it still takes a little longer to load but no where near as bad as it was.
So now that its working much faster I have added in the feeds from
blogs.oracle.com (although, I have noticed that this doesn't include all feeds listed on the site), Brian Duff's http://www.orablogs.com - (broken link) Orablogs and also Eddie's excellent
oraNA :: Oracle News Aggregator. Adding these feeds has caused some duplication of entries. I will see how that goes for now.