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Oracle Database Server and 32-bit Operating System Memory Limitations (Doc ID 269495.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version to [Release 10.1 to 11.2]
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Linux x86
z*OBSOLETE: Microsoft Windows 2000
Microsoft Windows (32-bit)
z*OBSOLETE: Microsoft Windows XP
z*OBSOLETE: Microsoft Windows Server 2003


Often the questions of the limitations imposed by the Oracle database arise.
The Oracle database imposes some limits and one can find these limits in the Oracle documentation
for the specific release, book Oracle Database® Reference Appendix A Database Limits.
Refer also to
<Note 336186.1> - Database Limits

However, often the Oracle database is additionally restricted by some OS level restrictions, which
applies also to the Oracle software, since it generally operates at the next level and uses OS APIs to
complete operations, such as disk and memory management. The purpose of this document is to discuss
the memory limitations imposed by the 32-bit architectures


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