Quote:
Originally Posted by TECK
Actually, they count very much. Even if memcached caches your datastore, it will still use bandwidth. Yes you save the processor, but your month bandwidth will increase. On the other hand, if you use XCache... it will chew the disk I/O. The real question is: What is more beneficial, performance wise?
Thanks for the input. 
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In my opinion, bandwidth will always be cheaper than CPU time or disk. I don't see how moving a query from hitting a MySQL database to memcache increases my bandwidth any, unless you're referring to the traffic between the memcache or database server and your webservers, but I'd hope that any site that is doing enough traffic to justify a memcache setup would most likely have an unmetered private network between their servers.