DBS-C01 Monitoring and Troubleshooting Practice Question
Which TWO settings should be verified when troubleshooting an RDS for MySQL instance that has a high number of aborted connections? (Choose 2.)
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
✓
connect_timeout parameter
Options A (connect_timeout) and B (max_allowed_packet) are correct because a low connect_timeout can cause connections to abort if not completed within the time limit, and a low max_allowed_packet can cause large queries to fail, resulting in aborted connections. Option C is incorrect because query_cache_type affects caching, not connection handling. Option D is incorrect because binlog_retention_hours is for binary log retention, unrelated to connections. Option E is incorrect because max_connections limits the total number of simultaneous connections but does not directly cause aborted connections; excessive connection attempts might be due to other issues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
connect_timeout parameter
Why this is correct
Low connect_timeout can cause aborted connections if client takes too long.
- ✓
max_allowed_packet parameter
Why this is correct
If packet size exceeds max_allowed_packet, connection may be aborted.
- ✗
query_cache_type parameter
Why it's wrong here
Query cache affects query performance, not connection handling.
- ✗
binlog_retention_hours parameter
Why it's wrong here
Binlog retention is for replication, not connections.
- ✗
max_connections parameter
Why it's wrong here
max_connections limits total connections but does not cause aborted connections.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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