최신 1Z0-084 무료덤프 - Oracle Database 19c Performance and Tuning Management

A. ALTER SYSTEM SET CURSOR_SHARING = FORCE;

B. ALTER SYSTEM SET CURSOR_SPACE_FOR_TIME - TRUE;

C. ALTER SYSTEM SET SESSION CACHED CURSORS = 500;

D. ALTER SYSTEM SET CURSOR_INVALIDATION = DEFERRED;

A. Both the RECYCLE and KEEP buffer caches should always have a very high cache hit ratio.

B. A 60% cache hit ratio can be observed for database instances which have very good I/O performance.

C. The performance of workloads that primarily generate full table scans and fast full index scans are always affected by the cache hit ratio.

D. A 99% cache hit ratio can be observed for database instances which have very poor I/O performance.

E. The buffer cache advisory view v$db_cache_advice provides advice on cache hit ratios appropriate for the instance workload.

A. Replace the FETCH FIRST clause with ROWNUM to enable the use of an index on SALES.

B. Enable Adaptive Plans so that Oracle can change the Join method as well as the Join order for this query.

C. Create an index on SALES.CUST_ID to force an INDEX RANGE SCAN on this index followed by a NESTED LOOP join between CUSTOMERS and SALES.

D. Collect a new set of statistics on PRODUCT, CUSTOMERS, and SALES because the current stats are inaccurate.

E. Create an index on SALES.TIME_ID to force the return of rows in the order specified by the ORDER BY clause.

A. They are notifications from the Oracle Database Server of an existing or impending problem.

B. They provide notifications but never any suggestions for correcting the identified problems.

C. They are logged in the alert log.

D. They can be viewed only from the Cloud Control Database home page.

E. Their threshold settings can be modified by using DBMS_SERVER_ALERT.

F. They may contain suggestions for correcting the identified problems.

A. SQL Optimization

B. SQL Row Source Generation

C. Shared Pool Memory Allocation

D. Syntax Check

E. Semantic Check

A. MN STORE COMPRESS FOR QUERY LOW

B. COLUMN STORE COMPRESS FOR QUERY HIGH

C. ROW STORE COMPRESS ADVANCED

D. STORE COMPRESS