当我在服务器上没有 WMI 权限时如何加速 SQLPS 连接

Question

将 SQLPS 连接到 SQL Server 时，它会尝试运行一些 WMI 服务状态查询。在没有权限的环境中，PowerShell 会发出一堆警告，并且连接速度非常慢。

可以使用 $WarningPreference = 'SilentlyContinue' 来抑制警告消息，但有没有办法禁用实际检查，以提高性能？

例子：

PS SQLSERVER:\> set-location \sql\myserver\default WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)) WARNING: Could not obtain SQL Server Service information. An attempt to connect to WMI on '<servername>' failed with the following error: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

场景：在执行任何工作之前，使用 PowerShell 作业步骤的 SQL 代理作业需要 30 多秒才能启动并连接到本地 SQL Server。

Answer 1

我发现连接速度慢的主要原因是 Set-Location 命令中的端口号（缺少端口号）。也就是说，对于自定义端口上的默认实例：

Set-Location \sql\$server\default\databases\mydb         #very slow
Set-Location \sql\$server`,$port\default\databases\mydb  #speedy quick

转义逗号很烦人，但很重要。不确定后端的详细信息，是否对端口造成影响，或者使用浏览器服务解析端口号是否很慢，但提供端口号可以可靠地解决性能问题。