Monitoring on Yongjie Xue

Claude Code Observability

Sun, 25 Jan 2026 00:00:00 +0000

Yesterday I tweeted: “Built a Claude Code Grafana dashboard to see how it makes decisions, uses tools, and burns through API credits.” Didn’t expect so much interest.

So let’s talk about Claude Code observability.

Why Observability?

Simple idea: I want to understand Claude Code’s internals. It’s not open source (well, it was leaked once), but you can reverse-engineer its behavior through metrics and logs.

Victoria: The Observability Stack That Slaps the Industry

Wed, 17 Dec 2025 00:00:00 +0000

VictoriaMetrics is brutally efficient—using a fraction of Prometheus + Loki’s resources for multiples of the performance. Pigsty v4 swaps to the Victoria stack; here’s the beta for anyone eager to try it.

Golden Monitoring Metrics: Errors, Latency, Throughput, Saturation

Fri, 06 Nov 2020 00:00:00 +0000

Understanding the golden monitoring metrics in PostgreSQL

PostgreSQL's KPI

Fri, 29 May 2020 00:00:00 +0000

Managing databases is similar to managing people - both need KPIs (Key Performance Indicators). So what are database KPIs? This article introduces a way to measure PostgreSQL load: using a single horizontally comparable metric that is basically independent of workload type and machine type, called PG Load.

Monitoring Table Size in PostgreSQL

Mon, 14 May 2018 00:00:00 +0000

Tables in PostgreSQL correspond to many physical files. This article explains how to calculate the actual size of a table in PostgreSQL.

PostgreSQL Server Log Regular Configuration

Tue, 06 Feb 2018 00:00:00 +0000

It’s recommended to configure PostgreSQL’s log format as CSV for easy analysis, and it can be directly imported into PostgreSQL data tables.