How to calcuate how much cpu/cores needed for an amalgamation of databases on a single instance

Question

Hi all, We have been given a project of producing a high level hardware spec for a new oracle linux server that would be an amalgamation of our current 5 windows servers all running Oracle 11203 Windows 2008 r2. All our windows boxes are Intel dual core with 12 cores each. My question is how to measure how much cpu is our current each oracle database is using to determine the min cpu/cores required for the new linux box? Hope i make sense. Thanks!

Answer 1

Snap Id
Snap Time
Sessions
Cursors/Session
Begin Snap:
7967
16-Mar-13 00:00:19
120
3.4
End Snap:
7983
16-Mar-13 16:00:08
119
3.6
Elapsed:
959.81 (mins)
DB Time:
11,565.82 (mins)
Load Profile
Per Second
Per Transaction
Per Exec
Per Call
DB Time(s):
12.1
0.6
0.05
0.09
DB CPU(s):
2.5
0.1
0.01
0.02
Top 5 Timed Foreground Events
Event
Waits
Time(s)
Avg wait (ms)
% DB time
Wait Class
DB CPU
141,781
20.43
Host CPU (CPUs: 40 Cores: 20 Sockets: 2)
Load Average Begin
Load Average End
%User
%System
%WIO
%Idle
10.05
16.90
6.4
2.3
0.0
90.6
Instance CPU
%Total CPU
%Busy CPU
%DB time waiting for CPU (Resource Manager)
6.9
73.7
0.0
Operating System Statistics
*TIME statistic values are diffed. All others display actual values. End Value is displayed if different
ordered by statistic type (CPU Use, Virtual Memory, Hardware Config), Name
Statistic
Value
End Value
BUSY_TIME
21,616,011
IDLE_TIME
208,748,575
IOWAIT_TIME
20,115
NICE_TIME
7
SYS_TIME
5,241,553
USER_TIME
14,766,063
LOAD
10
17
RSRC_MGR_CPU_WAIT_TIME
3,348
VM_IN_BYTES
2,126,163,628,032
VM_OUT_BYTES
-3,086,139,181,056
PHYSICAL_MEMORY_BYTES
202,835,083,264
NUM_CPUS
40
NUM_CPU_CORES
20
NUM_CPU_SOCKETS
2
Hope that above excerpts from AWR reports can tell how much cpu is consuming each database , because for each database you will run awr report and then compare them .