标签：des blog os 使用 io 文件 for 数据 div
1.物理的CPU个数
SELECT (cpu_count / hyperthread_ratio) AS PhysicalCPUs, cpu_count AS logicalCPUs FROM sys.dm_os_sys_info
2. 查询数据库恢复模式、 日志重用等待描述、 事务日志的大小、 使用的日志空间、 日志使用百分比、 兼容级别和页面验证
-- Recovery model, log reuse wait description, log file size, -- log usage size and compatibility level for all databases on instance SELECT db.[name] AS [Database Name] , db.recovery_model_desc AS [Recovery Model] , db.log_reuse_wait_desc AS [Log Reuse Wait Description] , ls.cntr_value AS [Log Size (KB)] ,lu.cntr_value AS [Log Used (KB)] , CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT) AS DECIMAL(18,2)) * 100 AS [Log Used %] , db.[compatibility_level] AS [DB Compatibility Level] , db.page_verify_option_desc AS [Page Verify Option] FROM sys.databases AS db INNER JOIN sys.dm_os_performance_counters AS lu ON db.name = lu.instance_name INNER JOIN sys.dm_os_performance_counters AS ls ON db.name = ls.instance_name WHERE lu.counter_name LIKE ‘Log File(s) Used Size (KB)%‘ AND ls.counter_name LIKE ‘Log File(s) Size (KB)%‘ ;
3.清除全局缓存使用下面的语句：
DBCC DROPCLEANBUFFERS;
4.从全局缓存中清除执行计划，使用下面的语句：
DBCC FREEPROCCACHE;
5.查看文件及文件组的语句
SELECT df.[name], df.physical_name, df.[size], df.growth, f.[name] [filegroup], f.is_default FROM sys.database_files df JOIN sys.filegroups f ON df.data_space_id = f.data_space_id
6.在SQL Server里查看当前连接的在线用户数
use master select loginame,count(0) from sysprocesses group by loginame order by count(0) desc select nt_username,count(0) from sysprocesses group by nt_username order by count(0) desc
标签：des blog os 使用 io 文件 for 数据 div
原文地址：http://www.cnblogs.com/riont/p/3937185.html
