RMAN的表级和表分区级恢复应用场景:1.You need to recover a very small number of tables to a particular point in time. In this situation, TSPITR is not the most effective solution because it moves all the objects in the tablespace to a specified point in time.2.You n…
Data Guard: Oracle 12c – New and updated Features (Doc ID 1558256.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 12.1.0.1 to 12.1.0.1 [Release 12.1]Oracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Clo…
在oracle 12c之前,收集直方图信息是相对比较耗费资源的,因为要重复扫描几次:在oracle 12c中,则有较大的提升,具体可参考https://jonathanlewis.wordpress.com/2013/07/14/12c-histograms/. There are a few enhancements in 12c that might make a big difference to performance for a small investment in effort.…