前言

想了了解数据库目前的连接池情况和日志文件占用情况

连接池情况

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select * from master.dbo.sysprocesses
where dbid = DB_ID('database')

select @@MAX_CONNECTIONS

SELECT @@CONNECTIONS

sp_who 'sa'

select spid,ecid,status,loginame,hostname,cmd,request_id
from sys.sysprocesses where loginame='sa' and hostname='JUNO'

日志文件占用情况

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DBCC SQLPERF(LOGSPACE)

DBCC showfilestats

Exec sp_spaceused

SELECT a.name [文件名称]
	,cast(a.[size]*1.0/128 as decimal(12,1)) AS [文件设置大小(MB)]
	,CAST( fileproperty(s.name,'SpaceUsed')/(8*16.0) AS DECIMAL(12,1)) AS [文件所占空间(MB)]
	,CAST( (fileproperty(s.name,'SpaceUsed')/(8*16.0))/(s.size/(8*16.0))*100.0  AS DECIMAL(12,1)) AS [所占空间率%]
	,CASE WHEN A.growth =0 THEN '文件大小固定，不会增长' ELSE '文件将自动增长' end [增长模式]
	,CASE WHEN A.growth > 0 AND is_percent_growth = 0 THEN '增量为固定大小'
		WHEN A.growth > 0 AND is_percent_growth = 1 THEN '增量将用整数百分比表示'
		ELSE '文件大小固定，不会增长' END AS [增量模式]
	,CASE WHEN A.growth > 0 AND is_percent_growth = 0 THEN cast(cast(a.growth*1.0/128as decimal(12,0)) AS VARCHAR)+'MB'
		WHEN A.growth > 0 AND is_percent_growth = 1 THEN cast(cast(a.growth AS decimal(12,0)) AS VARCHAR)+'%'
		ELSE '文件大小固定，不会增长' end AS [增长值(%或MB)]
	,a.physical_name AS [文件所在目录]
	,a.type_desc AS [文件类型]
FROM sys.database_files  a
INNER JOIN sys.sysfiles AS s ON a.[file_id]=s.fileid
LEFT JOIN sys.dm_db_file_space_usage b ON a.[file_id]=b.[file_id]
ORDER BY a.[type]

数据库收缩日志文件

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DECLARE @dbName varchar(128)
DECLARE @dbNamelog varchar(128)
DECLARE @sql nvarchar(2000) 
  
--创建游标获取所有数据库
DECLARE tables CURSOR FOR
   select name from sysdatabases where name not in ('master','tempdb','model','msdb','ReportServer','ReportServerTempDB')

-- 开启游标
OPEN tables
--获取光标位置
FETCH NEXT 
FROM tables INTO @dbName
	 
--FETCH 语句成功
WHILE @@FETCH_STATUS = 0

BEGIN
	set @dbNamelog=@dbName + '_log'

	print @dbNamelog

	set @sql='
 
	USE '+@dbName+'
 
	ALTER DATABASE '+@dbName+' SET RECOVERY SIMPLE WITH NO_WAIT
 
	ALTER DATABASE '+@dbName+' SET RECOVERY SIMPLE
 
	USE '+@dbName+'
 
	DBCC SHRINKFILE (N'''+@dbNamelog+''' , 11, TRUNCATEONLY)
 
	USE '+@dbName+'
 
	-- ALTER DATABASE '+@dbName+' SET RECOVERY FULL WITH NO_WAIT
 
	-- ALTER DATABASE '+@dbName+' SET RECOVERY FULL
 
	SELECT file_id, name FROM sys.database_files'
 
	exec(@sql)

   FETCH NEXT
      FROM tables
      INTO @dbName
END

--关闭游标
CLOSE tables

附录：数据库情况
附录：数据库收缩日志文件