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ArcSDE PostgreSQL Database Requirements
Supported Database Versions
Supported Operating Systems
Operating System Limitations
Supported Database Versions 
PostgreSQL 8.3.0
Supported Add-On: PostGIS 1.3.2
Supported Operating Systems 
| Database |
Supported Operating System(s) |
| PostgreSQL 8.3.0 |
Red Hat Enterprise Linux AS/ES 4.0 Update 2 (32-bit)
SUSE Linux Enterprise Server 10 (32-bit)
Windows 2003 SP2 (32-bit) Server Standard, Enterprise & Datacenter |
Operating System Limitations 
Linux
ArcSDE for PostgreSQL is only supported on Linux x86, on CPUs that adhere to the x86 architecture (32-bit), with supported Linux releases.
Windows
ArcSDE for PostgreSQL is currently only supported as a 32 bit application.
Windows XP SP2 Professional Edition
Windows XP Service Pack 2 is supported for basic testing and application development use only. It is not recommended for deployment in a production environment.
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