Gino Ruopolo schrieb:
Galvin Maltby wrote:
That's never been my experience.
Not my experience neither.
Also other sysadmin I know found the same when switched from Sparc to Opteron...
Then you know the wrong sysadmins.
Simple test: Compile some files in parallel (dmake -j X) on a 2 cpu box:
(1) dmake -j 2
real 1:18.18
user 1:37.05
sys 18.57
Load average: 1.32
(2) dmake -j 8
real 1:12.24
user 1:37.65
sys 18.42
Load average: 4.32
(3) dmake -j 64
real 1:14.06
user 1:37.90
sys 18.49
Load average: 11.86
. Same system time
. only a slight increase in user time from -j 8 to -j 64
I also did some other tests with an Oracle database and also achieved nearly
no additional overhead, regardless if 2 or 32 sessions were working on the
database.
Daniel
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