After the components you have selected are found to be acceptable for installation and you have indicated their target installation directories, the installer performs a system check to determine if your host meets the requirements for the components you selected.
The installer checks for disk space, memory, swap space, operating system, patches and operating system resources based on the components and the installation directories provided and informs you about the state of your system using the following messages:
System is ready for installation. When this message is displayed, the installer can proceed.
System is ready for installation, however, a resource, such as memory, is not at the recommended level. When this message is displayed, the installer can proceed but you should consider providing additional resources.
System is not ready for installation. When this message is displayed, the installer cannot proceed and you must take some action, such as installing missing patches.