On Feb 2, 2004, at 3:27 AM, Brad Knowles wrote:
In fact, in the case of announce-only lists of a very time-sensitive nature (e.g., sending out daily updates of the latest news over the past 24 hours that matches certain search criteria), you can do what InfoBeat/MercuryMail did -- run everything from a RAM disk.
It's definitely useful and a big win. It both clears up general disk I/O, but more importantly (from what I have seen), moves certain key inodes in the delivery file structure off of disk, and since I/O operations have to lock and unlock them for update, the time wasted single-threading through them goes way down (this is why, for instance, you should generate a fairly large number of sub-queues in sendmail; if you're trying to do volume and haven't, you're being silly; it spreads the load across more than one inode)
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