Four Key Performance Indicators for Every Java App by Jon Schneider at SpringOne Tour 2019

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

2. Tracing
Request
scoped
Logging
Events
Metrics
Aggregable*
Focal areas

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

4. 1. Latency - Alert to max,
performance tune to P99

5. 2. Utilization - CPU
process.cpu.usage
< 0.8

6. 3. Saturation - Memory
Saturation
jvm.gc.memory.promoted/
jvm.gc.memory.allocated
< 0.3

7. 4. Errors - Error/throughput
ratio
http.server.requests{outcome != “SUCCESS”} /
http.server.requests
< ERROR BUDGET

8. Summary
• L (Latency) - http.server.requests (max) < SLO
• U (Utilization) - process.cpu.usage < 0.8
• S (Saturation) -
jvm.gc.memory.promoted/jvm.gc.memory.allocated < 0.3
jvm.memory.used{area+id}/jvm.memory.max{area+id}
• E (Errors) - http.server.requests{outcome != “SUCCESS”}
/ http.server.requests < ERROR BUDGET