Running MySQL on a Windows server is not necessarily “not recommended,” but there are several factors that might make it less ideal compared to running it on a Linux server in certain scenarios. Here are a few reasons:

1. Performance: Historically, MySQL has been optimized for Linux/Unix environments, which may result in better performance compared to Windows. Linux is often considered more efficient in handling server tasks due to its architecture and process management.
2. Stability and Reliability: Linux systems are known for their stability and reliability, especially in server environments. Many production-grade server applications, including MySQL, are developed and tested primarily on Linux platforms.
3. Compatibility: Although MySQL runs on Windows, some features might work differently or have limited support compared to the Linux version. Additionally, certain third-party applications or tools might be more compatible with MySQL on Linux.
4. Security: Linux is generally considered more secure than Windows for server environments. Linux offers finer control over user permissions and access rights, and it’s less vulnerable to malware and viruses compared to Windows.
5. Cost: Linux distributions are typically free and open-source, while Windows Server requires licensing fees. For organizations with budget constraints, running MySQL on Linux can be a cost-effective solution.
6. Community and Support: The community and support resources for MySQL on Linux tend to be more extensive compared to Windows. There are a larger number of experienced users, forums, and documentation available for troubleshooting and assistance.

However, it’s essential to note that MySQL can still run effectively on Windows servers, especially in environments where Windows infrastructure is predominant or where specific Windows-based applications need to integrate with MySQL. Ultimately, the choice between running MySQL on Windows or Linux depends on factors such as performance requirements, existing infrastructure, familiarity with the operating system, and specific project needs.