Performance Tuning

iQIYI Technical Product Team

May 12, 2023 · Operations

Performance Troubleshooting and Optimization of Prometheus Monitoring Queries

The article explains that high metric cardinality in Prometheus causes long query times and timeouts, and demonstrates how using recording rules to pre‑compute aggregates dramatically reduces cardinality and latency, while recommending scrape interval tuning and metric design best practices to keep charts responsive.

Performance TuningPrometheusQuery Optimization

0 likes · 10 min read

Performance Troubleshooting and Optimization of Prometheus Monitoring Queries

Xianyu Technology

Jan 4, 2022 · Backend Development

Full GC Diagnosis and Tuning for Xianyu Backend Services

The article details three Xianyu backend incidents where Full GC pauses caused latency spikes or outages, analyzes root causes ranging from survivor space shortage and mis‑tuned CMS to oversized async Log4j events and massive string‑concatenation logs, and presents remediation steps such as switching to G1GC, adjusting Log4j settings, and using parameterized logging to eliminate the pauses.

BackendFull GCGarbage Collection

0 likes · 23 min read

Full GC Diagnosis and Tuning for Xianyu Backend Services