At least 1 GB of space in the temporary disk space (/tmp) directory

Between 4 GB and 16 GB: Equal to the size of the RAM
More than 16 GB: 16 GB
Note: Configure swap for your expected system loads. This installation guide provides minimum values for installation only. Refer to your Oracle Solaris documentation for additional memory tuning guidance.

Oracle recommends that you create an Optimal Flexible Architecture configuration as described in the appendix "Optimal Flexible Architecture" in Oracle Grid Infrastructure Installation and Upgrade Guide for your platform.

The ASCII character restriction includes installation owner user names, which are used as a default for some home paths, as well as other directory names you may select for paths.

Set locale (if needed)

Specify the language and the territory, or locale, in which you want to use Oracle components. A locale is a linguistic and cultural environment in which a system or program is running. NLS (National Language Support) parameters determine the locale-specific behavior on both servers and clients. The locale setting of a component determines the language of the user interface of the component, and the globalization behavior, such as date and number formatting.

Set Network Time Protocol for Cluster Time Synchronization

Oracle Clusterware requires the same time zone environment variable setting on all cluster nodes.

Ensure that you set the time zone synchronization across all cluster nodes using either an operating system configured network time protocol (NTP) or Oracle Cluster Time Synchronization Service.