MySQL high CPU usage
MySQL CPU spikes usually point to query inefficiency, indexing problems, or storage pressure pushing the database into expensive work.
Common symptoms
- mysqld becomes top CPU consumer
- Slow queries increase with load
- Throughput plateaus while CPU stays high
Likely causes
- Missing indexes
- Heavy scans and sorts
- Disk latency and IO pressure
Evidence to look for
MySQL process dominates CPU
Disk utilization rises under query bursts
Hot windows align with specific workloads
What it usually means
Database CPU without context is misleading. You need query and storage evidence together.
What to do next
- 1Review the hottest query paths
- 2Add or improve indexes
- 3Check whether storage latency is inflating CPU backlog
See what's causing your CPU
cpum.ai turns CPU, process, disk, and memory signals into plain-English explanations with evidence.
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