OCP CBT Question 540

Please solve the following question.

You are troubleshooting an Oracle database instance experiencing poor performance related to SQL statement parsing. You examine the V$SGASTAT and V$LIBRARYCACHE views and find the following:What is the most likely cause of the performance issue, and what action should you take?

Shared Pool StatisticsSQL> SELECT * FROM V$SGASTAT WHERE NAME = 'shared pool';NAME POOL BYTES------------ ----------- ----------shared pool shared pool 2000000000SQL> SELECT NAMESPACE, GETS, GETHITS, GETHITRATIO, PINS, PINHITS, PINHITRATIO FROM V$LIBRARYCACHE WHERE NAMESPACE = 'SQL AREA';NAMESPACE GETS GETHITS GETHITRATIO PINS PINHITS PINHITRATIO--------- ---------- ---------- ----------- ---------- ---------- -----------SQL AREA 1000000 900000 .9 1200000 1188000 .99The SGA_TARGET is set to 4GB, and SHARED_POOL_SIZE is not explicitly set.

The Library Cache Hit Ratio is too low, indicating shared pool fragmentation. Increase SHARED_POOL_SIZE or SGA_TARGET.

The Pin Hit Ratio for SQL Area is very high, indicating frequent re-parsing. Decrease SHARED_POOL_SIZE.

The Get Hit Ratio for SQL Area is acceptable (0.9), but the performance issue might be elsewhere, not directly related to shared pool sizing.

The shared pool is experiencing excessive invalidations, suggesting the need to use DBMS_SHARED_POOL.KEEP procedure.