Windows Memory Configuration: 32-bit and 64-bit
(Doc ID 873752.1)
Last updated on JULY 06, 2023
Applies to:
Oracle Database Backup Service - Version N/A and laterOracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.3 [Release 9.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
z*OBSOLETE: Microsoft Windows 2000
z*OBSOLETE: Microsoft Windows Server 2003
Microsoft Windows Itanium (64-bit)
z*OBSOLETE: Microsoft Windows Server 2003 R2 (64-bit AMD64 and Intel EM64T)
z*OBSOLETE: Microsoft Windows Server 2003 R2 (32-bit)
Microsoft Windows x64 (64-bit)
Goal
The goal is to understand the following concepts:
- OS Memory Configuration
- 32-bit and 64-bit systems
- Boot.ini file
- /3GB, /PAE, and /NOPAE Switches
- Oracle Memory Configuration
- Awe enabled
- Performance Implications of 32-bit Oracle
- Advantages of 64-bit Oracle
Only these versions of Windows fully support using the two switches in production systems:
- Windows 2000 Advanced Server
- Windows 2000 Datacenter Server
- Windows 2003 Enterprise Edition
- Windows 2003 Datacenter Edition
Solution
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In this Document
| Goal |
| Solution |
| 32-BIT Addressing |
| 4GT (4GB Tuning) with /3GB |
| 32-bit Systems with PAE (36-bit) |
| Windows 2003 /NOPAE Special Case (32-bit) |
| AWE for 32-bit Oracle |
| Performance Implications of 32-bit Memory Management |
Conserving Memory for User Connections |
Boot.ini Examples (32-bit) |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| Windows 2003 64-bit System Advantages |
64-bit Memory Support on Itanium based computers |
64-bit Memory Support on EM64T and Opteron based computers |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| Monitor Oracle Memory |
| References |