【多选题】

A user receives the following error while executing a query： ORA/x7f01555：snapshot too old Which two options can be the solutions to avoid such errors in future？（）

A、 increase the size of redo log files

B、 increase the size of the undo tablespace

C、 increase the size of the Database Buffer Cache

D、 increase the size of the default temporary tablespace

E、 enable the retention guarantee for the undo tablespace

  题目答案

  答案解析

略