This document discusses key monitoring indicators for Spring apps, including latency, utilization, saturation, and errors (L-USE). It recommends alerting when indicators reach their maximum and performance tuning to the 99th percentile (P99). Automated canary analysis is done using Kayenta. Latency is often 35-40x worse than P99 in many apps. The demonstration setup involves monitoring memory saturation using GC metrics to keep the promoted memory under 30% of the allocated memory.

1. Key Monitoring Indicators for
Spring Apps
Jon Schneider (@jon_k_schneider)

2. Goldilocks wouldn’t like our
telemetry.

3. L-USE:
Latency, Utilization, Saturation, Errors

4. Alert to max, performance
tune to P99

5. Automated canary analysis
is encapsulated by Kayenta

6. Max ~35-40x worse than
P99 in many apps.

7. Latency

8. Our demonstration setup
involves a few pieces

9. Memory Saturation
jvm.gc.memory.promoted/
jvm.gc.memory.allocated
< 0.3