SqlServer如何通过SQL语句获取处理器(CPU)、内存（Memory）、磁盘（Disk）以及操作系统相关信息

在SqlServer中，可以使用SQL语句获取处理器(CPU)、内存（Memory）、磁盘（Disk）以及操作系统相关信息。以下是两个示例说明，介绍如何在SqlServer中通过SQL语句获取这些信息。

示例1：获取处理器(CPU)信息

SELECT cpu_count AS 'CPU Count', hyperthread_ratio AS 'Hyperthread Ratio', 
cpu_ticks/(cpu_count*DATEDIFF(SECOND, creation_time, GETDATE())) AS 'CPU Utilization (%)'
FROM sys.dm_os_sys_info

在这个示例中，我们使用sys.dm_os_sys_info系统视图来获取处理器(CPU)信息。我们使用SELECT语句选择了cpu_count、hyperthread_ratio和cpu_ticks列，并使用DATEDIFF函数计算了CPU利用率。最后，我们使用AS关键字为每一列指定了别名。

示例2：获取内存（Memory）、磁盘（Disk）以及操作系统相关信息

SELECT 
    (physical_memory_in_use_kb/1024) AS 'Memory Used (MB)',
    (available_physical_memory_kb/1024) AS 'Memory Available (MB)',
    (total_page_file_kb/1024) AS 'Page File Size (MB)',
    (available_page_file_kb/1024) AS 'Page File Available (MB)',
    (total_virtual_address_space_kb/1024) AS 'Virtual Address Space (MB)',
    (process_kernel_time_ms/1000) AS 'Kernel Time (s)',
    (process_user_time_ms/1000) AS 'User Time (s)',
    (system_idle_process_ms/1000) AS 'Idle Time (s)',
    (system_cpu_usage) AS 'CPU Usage (%)',
    (io_stall_read_ms/1000) AS 'Disk Read Time (s)',
    (num_of_reads) AS 'Disk Reads',
    (io_stall_write_ms/1000) AS 'Disk Write Time (s)',
    (num_of_writes) AS 'Disk Writes',
    (io_stall) AS 'Disk I/O Time (s)',
    (num_of_bytes_read/1024/1024) AS 'Disk Bytes Read (MB)',
    (num_of_bytes_written/1024/1024) AS 'Disk Bytes Written (MB)',
    (os_error_handling_latency_ms) AS 'OS Error Handling Latency (ms)'
FROM sys.dm_os_process_memory, sys.dm_io_virtual_file_stats(NULL,NULL)

在这个示例中，我们使用sys.dm_os_process_memory和sys.dm_io_virtual_file_stats系统视图来获取内存（Memory）、磁盘（Disk）以及操作系统相关信息。我们使用SELECT语句选择了多个列，并使用AS关键字为每一列指定了别名。