摘要：
说明：产生direct path read事件的原因有三种情况： Causes This situation occurs in the following situations: The sorts are too large to fit in memory and some of the so 阅读全文
摘要：
Environment – Oracle 12c EE 12.1.0.2.0, 64bit on RHEL 7.3The task auto optimizer stats collection is created by catmwin.sql (run by catproc.sql during 阅读全文