Well, I just got this book, and just started reading through it.
Looks good so far. Just would like to comment on something I saw.
Must say BookPool.com is so awesome. 40% off most books (which I bought
three this time) and paid $4 for 5 day shipping yet I get it the next day on
my doorstep. Got to love that.
Page 28:
I will quote:
"A greater number of slower CPU's is often better than a fewer number of
faster ones."
To some extent I believe this is true especially with the efficient use of
caching in most OS's. But with the larger caches on unix cpu's, 4Mb, 8Mb.
There is a loss of performance when a process runs on a cpu, then context
switches and then placed on another cpu. All the cached tlb's are then
sitting on another cpu and need to be reloaded. Although the os will try to
reschedule recently run processes on the same cpu, that doesn't always
happen on a busy system. Also the fact that faster cpu's return the
processes back faster.
Although on the other hand, with more cpu's, more can get done
simultaneously but at a slower rate. And there would be fewer context
switches with many more cpu's.
Just something to think about.
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Christopher Spence
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
