I had to disable the plugin because I have gotten huge spikes in CPU usage. The cache works great as compared to version 2, so I am not sure where the CPU spikes come from. Basically, what happens is this:
I activate the plugin and make sure the cache is 100%. I de-activate on-the-fly related posts. AFterwards, all is well. But, as soon as I post again, the CPU usage spikes and the server crashes.
I have about 1800 posts and 180 tags now and I am using hyper-cache to cache pages. I am not sure what is happening, but my suspicion is that the new post causes a lot of database queries and also causes new cache pages to be generated.
I have thought about using a widget cache but wanted to get more feedback as to what the problem is first.
Your help would be much appreciated.