您好,登錄后才能下訂單哦!
這篇文章主要介紹“SQL Server數(shù)據(jù)文件收縮和查看收縮進(jìn)度的方法是什么”,在日常操作中,相信很多人在SQL Server數(shù)據(jù)文件收縮和查看收縮進(jìn)度的方法是什么問題上存在疑惑,小編查閱了各式資料,整理出簡(jiǎn)單好用的操作方法,希望對(duì)大家解答”SQL Server數(shù)據(jù)文件收縮和查看收縮進(jìn)度的方法是什么”的疑惑有所幫助!接下來(lái),請(qǐng)跟著小編一起來(lái)學(xué)習(xí)吧!
SQL Server在刪除數(shù)據(jù)后,會(huì)重新利用這部分空間,所以如果不是空間緊張的情況下,可以不回收。
回收一般先回收日志文件,因?yàn)檫@個(gè)回收速度非???,可以短時(shí)間內(nèi)清理出一部分可用空間。
--適用于RDS For SQL Server2012 SELECT DB_NAME(database_id) AS [Database Name],[Name] AS [Logical Name],[Physical_Name] AS [Physical Name],((size * 8) / 1024) AS [Size(MB)] FROM sys.master_files ORDER BY [Size(MB)] DESC --適用于RDS For SQL Server2008R2,需要對(duì)數(shù)據(jù)庫(kù)逐個(gè)執(zhí)行 USE 數(shù)據(jù)庫(kù)名 GO SELECT a.name as 邏輯文件名, size/128 [totalspace文件大小(兆)], FILEPROPERTY(a.name, 'SpaceUsed')/128 [usedspace已用空間(兆)], size/128 - FILEPROPERTY(a.name, 'SpaceUsed')/128 [未用空間(兆)], FILEPROPERTY(a.name, 'SpaceUsed')*100.0/size [使用率(%)] FROM sys.database_files a cross join (select recovery_model_desc, log_reuse_wait,log_reuse_wait_desc,is_auto_shrink_on from sys.databases where name=DB_NAME())b WHERE type=1
SELECT [name] ,[log_reuse_wait_desc] FROM master.sys.databases WHERE [name]='數(shù)據(jù)庫(kù)名【第1步獲取】'
DBCC SHRINKFILE(logicalName【第1步獲取】)
常見的日志等待類型是 LOG_BACKUP,日志還沒有備份,所以不能截?cái)? 解決方案: ACTIVE_TRANSACTION,有活躍事務(wù)阻塞了日志截?cái)? 解決方案: 執(zhí)行 DBCC OPENTRAN ,獲取下長(zhǎng)時(shí)間的活躍事務(wù)的SPID 然后執(zhí)行 DBCC INPUTBUFFER(SPID) 查看下這個(gè)請(qǐng)求SQL,考慮是否可以kill阻塞源,kill后再查下log_reuse_wait,嘗試shrink
USE 數(shù)據(jù)庫(kù)名 GO SELECT a.name as 邏輯文件名, size/128 [totalspace文件大小(兆)], FILEPROPERTY(a.name, 'SpaceUsed')/128 [usedspace已用空間(兆)], size/128 - FILEPROPERTY(a.name, 'SpaceUsed')/128 [未用空間(兆)], FILEPROPERTY(a.name, 'SpaceUsed')*100.0/size [使用率(%)] FROM sys.database_files a cross join (select recovery_model_desc, log_reuse_wait,log_reuse_wait_desc,is_auto_shrink_on from sys.databases where name=DB_NAME())b WHERE type=0
declare @usedspace int ,@totalspace int select @usedspace= xxx,@totalspace =yyy while @totalspace> @usedspace begin set @totalspace= @totalspace-5 *1024 DBCC SHRINKFILE( 邏輯文件名,@totalspace ) end
注:邏輯文件名,usedspace,totalspace從第4步的結(jié)果集獲取
SELECT DB_NAME(database_id) as dbname, session_id, request_id, start_time , percent_complete , dateadd(mi ,estimated_completion_time/60000,getdate ()) as ETC FROM sys.dm_exec_requests where percent_complete<>0
--查詢當(dāng)前數(shù)據(jù)庫(kù)備份進(jìn)度 SELECT DB_NAME(er.[database_id]) [DatabaseName],er.[command] AS [CommandType],er.[percent_complete] ,er.start_time,CONVERT(DECIMAL(5, 2) , er.[percent_complete]) AS [Complete_Percent] ,CONVERT(DECIMAL(38, 2), er.[total_elapsed_time] / 60000.00) AS [ElapsedTime_m] ,CONVERT(DECIMAL(38, 2), er.[estimated_completion_time] / 60000.00) AS [EstimatedCompletionTime_m] FROM sys.dm_exec_requests AS er WHERE er.[command] in ( 'RESTORE DATABASE' ,'BACKUP DATABASE') --DB_NAME(er.[database_id]) in ('ky2011') and --查看數(shù)據(jù)庫(kù)收縮進(jìn)度 SELECT DB_NAME(er.[database_id]) [DatabaseName],er.[command] AS [CommandType],er.[percent_complete] ,er.start_time,CONVERT(DECIMAL(5, 2) , er.[percent_complete]) AS [Complete_Percent] ,CONVERT(DECIMAL(38, 2), er.[total_elapsed_time] / 60000.00) AS [ElapsedTime_m] ,CONVERT(DECIMAL(38, 2), er.[estimated_completion_time] / 60000.00) AS [EstimatedCompletionTime_m] FROM sys.dm_exec_requests as er WHERE command in ('DbccFilesCompact','AUTOSHRINK')
到此,關(guān)于“SQL Server數(shù)據(jù)文件收縮和查看收縮進(jìn)度的方法是什么”的學(xué)習(xí)就結(jié)束了,希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí),快去試試吧!若想繼續(xù)學(xué)習(xí)更多相關(guān)知識(shí),請(qǐng)繼續(xù)關(guān)注億速云網(wǎng)站,小編會(huì)繼續(xù)努力為大家?guī)?lái)更多實(shí)用的文章!
免責(zé)聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如果涉及侵權(quán)請(qǐng)聯(lián)系站長(zhǎng)郵箱:is@yisu.com進(jìn)行舉報(bào),并提供相關(guān)證據(jù),一經(jīng)查實(shí),將立刻刪除涉嫌侵權(quán)內(nèi)容。