轉自:

System Configurations and Limits for Oracle Linux Releases (Doc ID 300652.1)

APPLIES TO:

Linux OS - Version Enterprise Linux 3.0 to Oracle Linux 7.0 with Unbreakable Enterprise Kernel [3.8.13] [Release RHEL3 to OL7]
Linux x86
Linux x86-64
Linux Itanium

PURPOSE

System Configurations and Limits (Memory, CPU, Disk imitations with maximums and minimums) for Oracle Linux 3, 4, 5, 6 and the UEK

 (Unbreakable Enterprise Kernel).

SCOPE

This document is informational and intended for any user using Oracle Linux.

DETAILS

Architectures Supported

Arch \ Version	3	4	5	5+UEK	6 (9)	7
x86 (1)	Yes	Yes	Yes	No	Yes	No
x86_64 (2)	Yes	Yes	Yes	Yes (7)	Yes	Yes
ia64	No	Yes (4)	Yes (6)	No	No	No

Maximum Logical CPUs (3)

Arch \ Version	3	4	5	6	7(12)
x86	16	32	32	32	N/A
x86_64	8	64	160/255	240/4096	240/5120
ia64	N/A	256/512	256/1024	N/A	N/A

Maximum Physical Memory (RAM)

Arch \ Version	3	4	5	5+UEK	6 (9)	7
x86	64GB	64GB	16GB (5)	16GB (5,11)	16GB (5)	N/A
x86_64	128GB	256GB / 1TB (10)	1TB (10)	2TB	6TB/64TB	6TB/64TB
ia64	N/A	2 TB	2 TB	2 TB	N/A	N/A

Maximum Default File System Size

Arch \ Version	3 (ext3)	4 (ext3)	5 (ext3)	6 (ext3/ext4)	7(ext4)
x86	2TB	8TB	16TB (Update 1)	16TB	16TB
x86_64	2TB	8TB	16TB (Update 1)	16TB	50TB
ia64	N/A	8TB	16TB	N/A	N/A

Maximum x86 (32-bit) Address Space

Arch \ Version	3	4	5	6	7
x86	approx. 4 GB	approx. 4 GB	approx. 3 GB (5)	approx. 3 GB (5)	N/A

Minimum Memory (RAM)

Arch \ Version	3	4	5	6	7
x86	256MB	256MB	512MB	512MB	N/A
x86_64	256MB	256MB	512MB	1GB	1GB
ia64	N/A	512MB	512MB	N/A	N/A

Minimum Disk Space

Arch \ Version	3	4	5	6	7(13)
x86	800 MB	800 MB	1GB	1GB	10GB
x86_64	800 MB	800 MB	1GB	1GB	10GB
ia64	N/A	800 MB	1GB	N/A	N/A

(1) Intel 32-bit Systems in the tables above.
(2) AMD64, Intel EM64T 64-bit Systems in the tables above.
(3) Multi-core and/or hyperthreading CPUs count as a single CPU in the table above.
(4) Update 7 is available as of August 1, 2008
(5) Limit low because the "hugemem" kernel is not available
(6) Update 4 is available as of April, 2010
(7) Unbreakable Enterprise Kernel for x86_64 is available over Oracle Linux 5.5 and higher
(8) With latest update level
(9) With Oracle Linux 6 the default kernel is Unbreakable Enterprise Kernel on x86_64 and RHEL compatible kernel with x86 (32-bit). The limits are provided based on that.
(10) AMD64 / Intel64: On those kernels larger memory can be handled with Intel CPUs
(11) Unbreakable Enterprise Kernel for x86 is available from Oracle Linux 5.7 and higher
(12) The theoretical upper limit is 5120 logical CPUs.
(13) Although the minimum disk space required for installation is 1GB, a minimum of 5 GB is recommended.

System Configurations and Limits for Oracle Linux Releases (Doc ID 300652.1)