2012-12-2 - 12-3 11gR2 "Database Installation Guide for Linux" page 1 - 47

New Tool to Configure Custom Installation Options -- CUSTOM建库的选项

Oracle Universal Installer no longer provides the custom installation option of

individual components. Use the chopt tool, a command-line utility that is located in

the ORACLE_HOME\bin directory, to configure the database options.

-- CUSTOM建库的选项已经移植到一个新的工具，chopt

Automatic Memory Management -- 自动内存管理

Starting with Oracle Database 11g, the Automatic Memory Management feature

requires more shared memory (/dev/shm)and file descriptors. The size of the shared

memory must be at least the greater of the MEMORY_MAX_TARGET and MEMORY_

TARGET parameters for each Oracle instance on the computer.

The number of file descriptors for each Oracle instance must be at least

512*PROCESSES. The limit of descriptors for each process must be at least 512. If file

descriptors are not sized correctly, you will see an ORA-27123 error from various

Oracle processes and potentially Linux Error EMFILE (Too many open

files)in non-Oracle processes.

To determine the amount of shared memory available, enter the following command:

# df -h /dev/shm/