DBS-C01 Management and Operations Practice Question
Exhibit
Refer to the exhibit. -- The following error log was retrieved from Amazon RDS for Oracle: ORA-00257: archiver error. Connect internal only, until freed. -- The DBA checks archive log usage: SELECT * FROM V$FLASH_RECOVERY_AREA_USAGE;
Refer to the exhibit. An Amazon RDS for Oracle instance is experiencing ORA-00257 errors. The DBA has already increased the archive log retention setting. What is the most efficient next step to resolve the issue without manual intervention?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Modify the DB instance to increase the allocated storage.
The ORA-00257 error indicates the flash recovery area is full. In Amazon RDS for Oracle, the flash recovery area size is tied to the allocated storage (default is 30% of allocated storage). Increasing allocated storage automatically expands the recovery area, resolving the issue without manual intervention. Option A is incorrect because Amazon RDS for Oracle does not support archiving redo logs directly to Amazon S3 as a built-in feature. Option B is incorrect because rebooting the DB instance does not free space in the recovery area; it only restarts the database. Option D is incorrect because manually deleting archive logs using RMAN requires manual intervention, which is not the most efficient automated solution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure archiving to Amazon S3 to offload logs.
Why it's wrong here
RDS Oracle does not support direct archiving to S3.
- ✗
Reboot the DB instance to clear the recovery area.
Why it's wrong here
Rebooting does not free space.
- ✓
Modify the DB instance to increase the allocated storage.
Why this is correct
Increasing storage automatically increases the recovery area size.
- ✗
Manually delete old archive logs from the recovery area using RMAN.
Why it's wrong here
This is manual and not efficient for ongoing prevention.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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