Swap requirements (RHEL)

RHEL5 Deployment Guide
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-swapspace.html

RHEL6 Installation Guide
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s2-diskpartrecommend-x86.html

Oracle DB 10
http://docs.oracle.com/cd/B19306_01/install.102/b15660/pre_install.htm

Oracle DB 11

http://docs.oracle.com/cd/E11882_01/install.112/e24321/pre_install.htm#LADBI1097

БД:

Oracle® Database Installation Guide 10g Release 2 (10.2) for Linux x86:

• At least 1024 MB of physical RAM
• The following table describes the relationship between installed RAM and the configured swap space requirement.

  RAM	Swap Space
  Between 1024 MB and 2048 MB	1.5 times the size of RAM
  Between 2049 MB and 8192 MB	Equal to the size of RAM
  More than 8192 MB	0.75 times the size of RAM

Oracle® Database Installation Guide 11g Release 2 (11.2) for Linux:

The following are the memory requirements for installing Oracle Database 11g Release 2 (11.2):

Minimum: 1 GB of RAM

Recommended: 2 GB of RAM or more

• To determine the RAM size, enter the following command:

  # grep MemTotal /proc/meminfo

  If the size of the RAM is less than the required size, then you must install more memory before continuing.

• The following table describes the relationship between the installed RAM and the configured swap space recommendation:

  Note:

  On Linux, the HugePages feature allocates non-swappable memory for large page tables using memory-mapped files. If you enable HugePages, then you should deduct the memory allocated to HugePages from the available RAM before calculating swap space.

  RAM	Swap Space
  Between 1 GB and 2 GB	1.5 times the size of the RAM
  Between 2 GB and 16 GB	Equal to the size of the RAM
  More than 16 GB	16 GB

RHEL5 Deployment Guide:

Table 7.1. Recommended System Swap Space

RHEL6 Installation Guide:

Table 9.2. Recommended System Swap Space