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Oracle Enterprise Manager 12c Server Sizing

Oracle Enterprise Manager 12c server sizing is calculated by a) total number of managed agents and targets, b) the future growth of your Oracle Enterprise Manager environment and c) your organization's high availability requirements. For example, if you know the total number of managed agents and targets, sizing WebLogic and the Oracle database is as simple as following Table 1, Table 2, and Table 3. As you add more agents and targets, it is important to consider the future growth of your Oracle Enterprise Manager environment as well as the ability to scale up or to scale out with additional CPU, RAM and storage.
 
Table 1 shows the recommended Oracle Enterprise Manager hardware requirements for an evaluation, small, medium and large deployment.
Deployment Size
OMS Hosts
OMS CPU Cores
OMS RAM
OMS Storage
DB Hosts
DB CPU Cores
DB RAM
All-in-one Install
Eval < 10 agents, < 100 targets, < 3 Concurrent User Sessions
1
2
*4 GB
18 GB
1
2
6
Yes
Small < 100 agents, < 1000 targets, < 10 Concurrent User Sessions
1
2
*6 GB
18 GB
1
2
6
No
Medium >= 100, < 1000 agents >= 1000, < 10,000 targets,  > = 10, < 25 Concurrent User Sessions
1
4
*6 GB
18 GB
2 with RAC
4 for each RAC node
8
No
Large >= 1000 agents, >= 10,000 targets,  >= 25, <= 50* Concurrent User Sessions
2
4
*6 GB
18 GB
2 with RAC
8 for each RAC node
16
No

* To use BI Publisher add 1.5 GB of RAM.

Table 2 shows the minimum storage requirments for the database server hosting the Oracle Management Repository.

Deployment Size
MGMT_TABLESPACE
MGMT_ECM_DEPOT_TS
TEMP
ARCHIVE LOG AREA
Eval < 10 agents, < 100 targets, < 3 Concurrent User Sessions
15 GB
1 GB
3 GB
Off
Small < 100 agents, < 1000 targets, < 10 Concurrent User Sessions
50 GB
1 GB
10 GB
25 GB
Medium >= 100, < 1000 agents >= 1000, < 10,000 targets,  > = 10, < 25 Concurrent User Sessions
200 GB
4 GB
20 GB
100 GB
Large >= 1000 agents, >= 10,000 targets,  >= 25, <= 50* Concurrent User Sessions
300 GB
8 GB
40 GB
150 GB

Table 4 shows the minimum storage requirements for a standalone Oracle Management Agent installation.

Platform
Storage
TMP Directory
Linux 32 bit
1.2 GB
400 MB
Linux x86_64
1.2 GB
400 MB

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