On Tue, Jul 9, 2013 at 12:24 AM, Jesper Krogh <jes...@krogh.cc> wrote: > > The really, really big ones are useful even for pushing limits, such > as cr1.8xlarge, with 32 CPUs and 244GiB memory. Current spot instance > price (the heavily discounted "can die at any time" one) is $0.343/hr. > Otherwise, it's 3.500/hr. > > > Just to keep in mind cpus are similar throttled: > > One EC2 Compute Unit provides the equivalent CPU capacity of a 1.0-1.2 GHz > 2007 Opteron or 2007 Xeon processor. This is also the equivalent to an > early-2006 1.7 GHz Xeon processor referenced in our original documentation.
This is only a statement of measurement (notably, it also is a metric that is SMP-processor-count-oblivious), for lack of a more sensible metric (certainly not clock cycles nor bogomips) in common use. > Who knows what that does to memory bandwidth / context switches etc. Virtualization adds complexity, that is true, but so does a new version of Linux or comparing across microprocessors, motherboards, or operating systems. I don't see a good reason to be off-put in the common cases, especially since I can't think of another way to produce such large machines on a short-term obligation basis. The advantages are probably diminished (except for testing virtualization overhead on common platforms) for smaller machines that can be located sans-virtualization more routinely. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
