In order to install Oracle Enterprise Manager 12c successfully, hardware requirements such as CPU, memory, and disk space need to be confirmed as per the Oracle recommended prerequisites.
Before you get started, ensure that the server is connected to the network, and an SSH or a telnet client is available. Also, make sure you have access to the Unix server as a root user or as a privileged user.
The following commands show how to identify the availability of CPU, RAM, heap size, and hard disk space on the server:
CPU count
# cat /proc/cpuinfo|grep "physical id"|sort|uniq|wc -l
Cores
# cat /proc/cpuinfo | grep "cpu cores" | uniq cpu cores : 4 # less /proc/cpuinfo|grep processor processor : 0 processor : 1 processor : 2 processor : 3 processor : 4 processor : 5 processor : 6 processor : 7
RAM
# cat /proc/meminfo|grep MemTotal MemTotal: 12300176 kB
Hard disk space on Mountpoint
# df -h|grep u01 Filesystem Size Used Avail Use% Mounted on /dev/sda7 46G 12G 32G 27% /u01
The preceding commands provide details about CPU, CPU cores, memory, and hard disk space on the server. They should be ratified against the minimum required prerequisites for the installation. In case the disk space is not adequate, then the required space should be added to the server for the target hardware as per Oracle documentation.