PerformanceMonitor
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How to install PerformanceMonitor?
erikdarlingdata/performancemonitor
$git clone https://github.com/erikdarlingdata/PerformanceMonitorFree, open-source monitoring that replaces the tools charging you thousands per server per year. 30+ collectors, real-time alerts, built-in MCP server for AI analysis. Nothing phones home. Your data stays on your server and your machine.
README.md
| 1 | # SQL Server Performance Monitor |
| 2 | |
| 3 | <p align="center"> |
| 4 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/stargazers"><img src="https://img.shields.io/github/stars/erikdarlingdata/PerformanceMonitor?style=for-the-badge&logo=github&color=gold&logoColor=black" alt="GitHub Stars"></a> |
| 5 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/network/members"><img src="https://img.shields.io/github/forks/erikdarlingdata/PerformanceMonitor?style=for-the-badge&logo=github" alt="GitHub Forks"></a> |
| 6 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/blob/main/LICENSE"><img src="https://img.shields.io/github/license/erikdarlingdata/PerformanceMonitor?style=for-the-badge" alt="License: MIT"></a> |
| 7 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/releases/latest"><img src="https://img.shields.io/github/v/release/erikdarlingdata/PerformanceMonitor?style=for-the-badge" alt="Latest Release"></a> |
| 8 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/issues"><img src="https://img.shields.io/github/issues/erikdarlingdata/PerformanceMonitor?style=for-the-badge" alt="Open Issues"></a> |
| 9 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/commits/main"><img src="https://img.shields.io/github/last-commit/erikdarlingdata/PerformanceMonitor?style=for-the-badge" alt="Last Commit"></a> |
| 10 | <a href="https://github.com/erikdarlingdata/PerformanceMonitor/actions/workflows/build.yml"><img src="https://img.shields.io/github/actions/workflow/status/erikdarlingdata/PerformanceMonitor/build.yml?style=for-the-badge&label=CI" alt="CI"></a> |
| 11 | </p> |
| 12 | <p align="center"> |
| 13 | <a href="https://x.com/erikdarlingdata"><img src="https://img.shields.io/badge/Follow_%40ErikDarlingData-black?style=for-the-badge&logo=x&logoColor=white" alt="Follow @ErikDarlingData on X"></a> |
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| 15 | <a href="https://www.linkedin.com/in/erik-darling-data/"><img src="https://img.shields.io/badge/LinkedIn-Connect-0077B5?style=for-the-badge&logo=linkedin&logoColor=white" alt="LinkedIn Connect"></a> |
| 16 | <a href="https://erikdarling.com"><img src="https://img.shields.io/badge/Blog-erikdarling.com-FF6B35?style=for-the-badge&logo=wordpress&logoColor=white" alt="Blog"></a> |
| 17 | </p> |
| 18 | |
| 19 | **Free, open-source monitoring that replaces the tools charging you thousands per server per year.** Specialized collectors, real-time alerts, and a built-in MCP server for AI analysis. Nothing phones home. Your data stays on your server and your machine. |
| 20 | |
| 21 | **Supported:** SQL Server 2016–2025 | Azure SQL Managed Instance | AWS RDS for SQL Server | Azure SQL Database (Lite and Darling) |
| 22 | |
| 23 |  |
| 24 | |
| 25 | --- |
| 26 | |
| 27 | ## Editions |
| 28 | |
| 29 | Pick by how you want collection to run — the monitoring brain (collectors, alert engine, plan analysis, MCP tools) is shared across all three at the library level. |
| 30 | |
| 31 | | | **[Lite](https://github.com/erikdarlingdata/PerformanceMonitor/releases/latest)** — flagship | **[Darling](Darling/README.md)** — headless | **[Dashboard](Dashboard/README.md)** — *deprecated* | |
| 32 | |---|---|---|---| |
| 33 | | **How it runs** | Single desktop app monitors remotely, on demand | Windows service collects 24/7 into a central store; detached viewer reads it from any seat | SQL-Server-installed database + Agent collectors, separate viewer app | |
| 34 | | **Installs on your server?** | No | No | Yes (a `PerformanceMonitor` database) | |
| 35 | | **Stores data** | Local DuckDB + Parquet | Bundled PostgreSQL + TimescaleDB | In the target SQL Server | |
| 36 | | **Best for** | Quick triage, Azure SQL DB, locked-down servers, consultants, firefighting | Always-on monitoring of many servers from one service | *Existing installs only — new deployments should use Lite or Darling* | |
| 37 | | **Requires** | `VIEW SERVER STATE` ([permi |
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