Complete Record of Troubleshooting CPU Jitter in uWSGI + Django Stability Tests
uWSGI + Django Stability CPU Jitter Troubleshooting Record Problem Phenomenon In a stability test, a Django application published using uWSGI showed periodic CPU jitter. From the monitoring chart, it can be seen that a significant CPU usage peak occurs approximately every 4 hours, accompanied by a drop in memory usage: Preliminary Analysis: Attribution to GC Misconception First Instinct: Garbage Collection (GC) Observation: Memory drops when CPU peaks, looking like GC triggering. Time Pattern: Every ~4 hours, showing strong periodicity. Troubleshooting Direction: Check for scheduled GC (none found). Suspicion Direction: All Workers GC Simultaneously Through research, it was found that uWSGI’s pre-fork mode might lead to: ...