Hardware Requirements for Oracle RAC Installation

Each system must meet the following minimum hardware requirements:

• At least 1 GB of physical RAM
• Swap space equivalent to the multiple of the available RAM, as indicated in the following table:

  Available RAM	Swap Space Required
  Between 1 GB and 2 GB	1.5 times the size of RAM
  Between 2 GB and 8 GB	Equal to the size of RAM
  More than 8 GB	.75 times the size of RAM

• 400 MB of disk space in the /tmp directory
• 2 GB of disk space for Oracle Clusterware files, in partitions on separate physical disks, assuming standard redundancy (2 Oracle Cluster Registry partitions and 3 voting disks)
• 650 MB of disk space for the Oracle Clusterware home
• 5 GB of disk space for the Oracle database software (Oracle base), depending on the installation type and platform
• 1.2 GB of disk space for a preconfigured database that uses file system storage (optional)
  Additional disk space, either on a file system or in an Automatic Storage Management disk group, is required for the Fast recovery area if you choose to configure automated backups.
  
  
  
  
  To ensure that each system meets these requirements:

1. To determine the physical RAM size, enter the following command:

   # /usr/sbin/prtconf | grep "Memory size"
   

   If the size of the physical RAM installed in the system is less than the required size, then you must install more memory before continuing.
2. To determine the size of the configured swap space, enter the following command:

   # /usr/sbin/swap -s
   

   If necessary, refer to your operating system documentation for information about how to configure additional swap space.
3. To determine the amount of disk space available in the /tmp directory, enter the following command:

   # df -k /tmp
   

   If there is less than 400 MB of disk space available in the /tmp directory, then complete one of the following steps:
   • Delete unnecessary files from the /tmp directory to meet the disk space requirement.
   • Set the TEMP and TMPDIR environment variables when setting the oracle user's environment (described later).
   • Extend the file system that contains the /tmp directory. If necessary, contact your system administrator for information about extending file systems.
4. To determine the amount of free disk space on the system, enter the following command:

   # df -k /tmp
   

   The following table shows the approximate disk space requirements for software files for each installation type:

   Installation Type	Requirement for Software Files (GB)
   Enterprise Edition	4
   Standard Edition	4
   Custom (maximum)	4

5. To determine if the system architecture can run the Oracle software, enter the following command:

   # /bin/isainfo -kv
   

   Note:

   The following is the expected output of this command:

   64-bit SPARC installation:

   64-bit sparcv9 kernel modules

   Ensure that the Oracle software you have is the correct Oracle software for your processor type.

   If the output of this command indicates that your system architecture does not match the system for which the Oracle software you have is written, then you cannot install the software. Obtain the correct software for your system architecture before proceeding further.