Hot-Loop Detection in Production Code

Some loops run too often, eating CPU and producing log spam. The detection patterns and the fixes.

Symptoms

CPU pegged on a single instance. Specific log line repeated thousands of times per minute.

Same code path in many traces with high frequency.

Detection

Per-line log frequency dashboard. Lines >1000/minute are suspect.

CPU profiling: sample profiling reveals hot functions.

Fix

Add backoff. Caching. Conditional logging that suppresses repeats.

Test the fix: the same workload should not trigger the loop after the fix.