Postgres high CPU usage
Postgres CPU issues are often query-plan problems, cache misses, or disk contention masquerading as pure compute load.
Common symptoms
- postgres PID rises under read/write load
- Latency increases for query-heavy endpoints
- CPU stays high during reporting or scans
Likely causes
- Sequential scans or poor query plans
- Disk bottlenecks
- Insufficient memory for caching
- Connection or worker pressure
Evidence to look for
Postgres shows as top process
Disk utilization and await times rise
CPU correlates with specific query windows
What it usually means
Databases often look CPU-bound while actually suffering from storage or plan inefficiency.
What to do next
- 1Inspect query plans and hot queries
- 2Check buffer cache effectiveness and memory pressure
- 3Move storage to faster media if disk is saturated
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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