Many new changes in Oracle Database (Database) 11g Ensure that this dream is closer to reality. Oracle released Oracle Database 11g Release 2 For Linux. For example, a database replay tool allows you to capture the production database load and replay it in a test (or even the same) database to evaluate the impact of changes. Alternatively, consider using SQL Performance Analyzer, which can predict the impact of changes on Performance before making changes to SQL.
Official introduction page
Download Page
Document page
Http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_grid.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_examples.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_gateways.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_grid.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_gateways.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_database_1of2.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux.x64_11gR2_database_2of2.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_examples.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_1of2.zip
Http://download.oracle.com/otn/linux/oracle11g/R2/linux_11gR2_database_2of2.zip
Http://download.oracle.com/docs/cds/E11882_01.zip