Shulou(Shulou.com)06/01 Report--

Examine the parameters for a database instance:

NAME TYPE VALUE

temp_undo_enabled boolean TRUE

undo_management string AUTO

undo_retention integer 900

undo_tablespace string UNDOTBSl

Your database has three undo tablespaces and the default undo tablespace is not autoextensible. Resumable space allocation is not enabled for any sessions in the database instance.

What is the effect on new transactions when all undo space in the default undo tablespace is in use by active transactions?

A. Transactions write their undo in the system undo segment.

B. Transactions wait until space becomes available in undotbs1.

C. Transactions write their undo in a temporary tablespace.

D. Transactions fail.

Answer: D

[Analysis]

In UNDO tablespaces, active transactions use space that cannot be overwritten. If the UNDO table space is full and cannot be overwritten, the new transaction fails because it cannot allocate UNDO space.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.