Since Java is so stupendously fast (really!) I've been more and more focused on scaling up lately, as opposed to the "easy cop-out" by scaling out, in an effort to reduce running costs. If any of you have tried running a bigger site on GAE, you know what I mean - you think it's cheap in the beginning, but pretty soon you need reserved instances, more memory, increased bandwidth limits etc. and it all adds up pretty quick. Now there's a lot different tools for testing website throughput and other performance aspects, but I'm looking for something Tapestry-specific so that serving static resources and other irrelevant activities wouldn't skew my numbers. I already have something home-grown, but it'd be great if there was a comprehensive yet lightweight package for gathering long-term data and performance averages for serving page requests, ideally attaching itself to the request pipeline. I'm trying to push page handling averages including database access down to 10ms or below for at least 1 million requests a day per system. So I need comprehensive long-term data to know where the hotspots are. If somebody has something half-baked written already, I wouldn't mind participating in taking it to a solid, generally useful module for all Tapestry users.
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