Oracle OCP 19c 认证1Z0-083考试(第23题)
作者：互联网
Examine this output:
Which two are true? (Choose two.)
- A. Any PDB not specified in the plan will be unable to execute statements in parallel.
- B. PDB3 can use all available parallel execution processes at times.
- C. PDB1 is always limited to 40% of the available system resources regardless of demand.
- D. Any PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.
- E. PDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.
- F. PDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.
AB
A. Correct as then a PDB will get assigned the default directive with parallel_server_limit set to 0
B. Correct as parallel_server_limit is not specified for PDB3 and it defaults to 100
Quote:
https://docs.oracle.com/database/121/ADMIN/dbrm.htm#ADMIN14008
"If PARALLEL_SERVER_LIMIT is not specified, then it defaults to 100%."
C. Incorrect. A PDB can use more resources:
Quote from
https://docs.oracle.com/database/121/ADMIN/cdb_dbrm.htm#ADMIN13777
"However, any PDB can use more than the guaranteed amount of a resource if there is no resource contention."
D. Incorrect. Shares is a minimum guaranteed value. But a PDB can use more as explained above in C.
E. Incorrect. Nothing confirms that there are only 3 PDBs attached. There may be others using the default pdb directive. Then the share for PDB2 is not 20%
F. Incorrect. parallel_server_limit is an upper limit.
标签：available,use,23,1Z0,guaranteed,PDB,083,parallel,resources 来源： https://blog.csdn.net/itsaka/article/details/117632804