Technology limits (certified[/theoretical]) of redhat linux

Version 2.1
Version 3
Version 4

x86
16GB
64GB
64GB

Itanium2
32GB
128GB
256GB/1024TB

AMD64/EM64T
n/a
128GB
128GB/1TB

Power
n/a
64GB
128GB/1TB

zSeries
n/a
64GB
64GB

Maximum filesize
1TB
1TB
8TB

Maximum filesystem size (Ext3)
1TB
1TB
8TB

Maximum x86 per-process virtual address space
3GB
Approx 4GB
Approx 4GB

=======================================
AS system limits (all architectures):



Maximum physical CPUs
-
-
-
Maximum memory
-
-
-
ES system limits (all architectures)



Maximum physical CPUs
2
2
2
Maximum memory
4GB
8GB
16GB