Get-sqmPerfCounters
Performance sqmSQLTool v1.8.2+
Reads SQL Server performance counters from sys.dm_os_performance_counters.

Examples

Get-sqmPerfCounters -SqlInstance "SQL01"
Get-sqmPerfCounters -SqlInstance "SQL01"
Get-sqmPerfCounters -SqlInstance "SQL01" -Category "Buffer","Memory"
Get-sqmPerfCounters -SqlInstance "SQL01" -Category "Buffer","Memory"