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U01SFA3
Asked: 2014-04-24 08:37:50 +0800 CST

庞大的 MSDB 数据库

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我有一个非常大的 MSDB 数据库，并且一直在努力清除它并设置维护任务——这是我的前任几年前应该做的事情！

到目前为止，我已经设法截断了sysmaintplan_logdetail和sysmaintplan_log文件。

现在我希望查看一些备份数据库——备份文件表超过 5Gb。

我尝试使用 SP sp_delete_backuphistory但这填满了我的 MSDB 事务日志并几乎杀死了服务器......

有没有其他方法可以清除它并缩小文件而不造成任何损坏？

有关信息，我的 MSDB 数据文件仍然是 20Gb，使用的是 13Gb。登录500Mb，用了6Mb。

任何帮助将不胜感激 - 我不是 DBA！

disk-space truncate

1 个回答

  1. Best Answer

    我尝试使用 SP sp_delete_backuphistory 但这填满了我的 MSDB 事务日志并几乎杀死了服务器......

    有没有其他方法可以清除它并缩小文件而不造成任何损坏？

    分批进行。

    如果你的 msdb 很大，那么在运行脚本后，为了释放未使用的空间，我建议你缩小你的 msdb（是的，缩小它，然后一旦空间被释放，你可以使用 OLA 的脚本进行重组/重建和更新统计信息-这种收缩将是一次性的事情- 这样您就可以释放未使用的空间）。

    确保根据服务器的繁忙程度安排以下脚本频繁运行（就作业频率而言，日志传送是否正在运行以及数据库邮件的使用+服务器上发生的备份和恢复为他们都登录到MSDB）

    use msdb
/* Author : Kin
   Purpose: For dba.stackexchange.com - Trim down msdb
*/

-- Declaration
DECLARE @DeleteDate datetime 
DECLARE @DaysToRetain int
DECLARE @Batch int

set @DaysToRetain = 30
set @Batch = 5000
set @DeleteDate = convert(datetime,convert(varchar,getdate()-@DaysToRetain,101),101) 


-- ----------------
--  Index creation
-- ----------------
--  backupset
-- ----------------
Print 'Index Creation..'

if not exists (select * from msdb..sysindexes where name = 'IX_backupset_backup_set_uuid')
begin   
    Create NONCLUSTERED index IX_backupset_backup_set_uuid on backupset(backup_set_uuid)
end 

if not exists (select * from msdb..sysindexes where name = 'IX_backupset_media_set_id')
begin   
    Create NONCLUSTERED index IX_backupset_media_set_id on backupset(media_set_id)
end

if not exists (select * from msdb..sysindexes where name = 'IX_backupset_backup_finish_date')begin  
    Create NONCLUSTERED index IX_backupset_backup_finish_date on backupset(backup_finish_date)
end 

if not exists (select * from msdb..sysindexes where name = 'IX_backupset_backup_start_date')    
begin
    Create NONCLUSTERED index IX_backupset_backup_start_date on backupset(backup_start_date)
end


-- ------------
--  backupfile
-- ------------
if not exists (select * from msdb..sysindexes where name = 'IX_backupfile_backup_set_id')    
begin
    Create NONCLUSTERED index IX_backupfile_backup_set_id on backupfile(backup_set_id)
end

-- -------------------
--  backupmediafamily
-- -------------------
if not exists (select * from msdb..sysindexes where name = 'IX_backupmediafamily_media_set_id')    
begin
    Create NONCLUSTERED index IX_backupmediafamily_media_set_id on backupmediafamily(media_set_id)
end

-- -------------------
--  backupfilegroup
-- -------------------
if not exists (select * from msdb..sysindexes where name = 'IX_backupfilegroup_backup_set_id')    
begin
    Create NONCLUSTERED index IX_backupfilegroup_backup_set_id on backupfilegroup(backup_set_id)
end

-- ----------------
--  restorehistory
-- ----------------
if not exists (select * from msdb..sysindexes where name = 'IX_restorehistory_restore_history_id')    
begin
    Create NONCLUSTERED index IX_restorehistory_restore_history_id on restorehistory(restore_history_id)
end

if not exists (select * from msdb..sysindexes where name = 'IX_restorehistory_backup_set_id')    
begin
    Create NONCLUSTERED index IX_restorehistory_backup_set_id on restorehistory(backup_set_id)
end

-- -------------
--  restorefile
-- -------------
if not exists (select * from msdb..sysindexes where name = 'IX_restorefile_restore_history_id')    
begin
    Create NONCLUSTERED index IX_restorefile_restore_history_id on restorefile(restore_history_id)
end

-- ------------------
--  restorefilegroup
-- ------------------
if not exists (select * from msdb..sysindexes where name = 'IX_restorefilegroup_restore_history_id')    
begin
    Create NONCLUSTERED index IX_restorefilegroup_restore_history_id on restorefilegroup(restore_history_id)
end

Print 'End of Index Creation..'


-- ------------------------------
--  Maintenance  before deletion
-- ------------------------------
--  Reindex 
-- ------------------------------

-- ----------------
--  backupset
-- ----------------
Print 'Maintenance Reindex..'

ALTER INDEX [IX_backupset_backup_set_uuid] ON [msdb].[dbo].[backupset] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupset_backup_set_uuid..'

ALTER INDEX [IX_backupset_media_set_id] ON [msdb].[dbo].[backupset] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupset_media_set_id..'


ALTER INDEX [IX_backupset_backup_finish_date] ON [msdb].[dbo].[backupset] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupset_backup_finish_date..'

ALTER INDEX [IX_backupset_backup_start_date] ON [msdb].[dbo].[backupset] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupset_backup_start_date..'


-- ------------
--  backupfile
-- ------------
ALTER INDEX [IX_backupfile_backup_set_id] ON [msdb].[dbo].[backupfile] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupfile_backup_set_id..'

-- -------------------
--  backupmediafamily
-- -------------------
ALTER INDEX [IX_backupmediafamily_media_set_id] ON [msdb].[dbo].[backupmediafamily] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_backupmediafamily_media_set_id..'

-- ------------------
--  backupfilegroup
-- ------------------
ALTER INDEX [IX_backupfilegroup_backup_set_id] ON [msdb].[dbo].[backupfilegroup] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print '[IX_backupfilegroup_backup_set_id]..'

-- ----------------
--  restorehistory
-- ----------------
ALTER INDEX [IX_restorehistory_restore_history_id] ON [msdb].[dbo].[restorehistory] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_restorehistory_restore_history_id..'


ALTER INDEX [IX_restorehistory_backup_set_id] ON [msdb].[dbo].[restorehistory] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_restorehistory_backup_set_id..'

-- -------------
--  restorefile
-- -------------
ALTER INDEX [IX_restorefile_restore_history_id] ON [msdb].[dbo].[restorefile] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_restorefile_restore_history_id..'


-- ------------------
--  restorefilegroup
-- ------------------
ALTER INDEX [IX_restorefilegroup_restore_history_id] ON [msdb].[dbo].[restorefilegroup] REORGANIZE WITH ( LOB_COMPACTION = OFF)
WAITFOR DELAY '00:00:05'
print 'IX_restorefilegroup_restore_history_id..'

Print 'End of Maintenance Reindex..'



--delete records    

print 'DEL restorefile..' 
if exists (select * from msdb.dbo.sysobjects where name = 'restorefile')    
begin 
    
    DELETE top (@Batch) FROM msdb..restorefile
    FROM msdb..restorefile rf with (nolock)
        INNER JOIN msdb..restorehistory rh with (nolock) ON rf.restore_history_id = rh.restore_history_id
        INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
    WHERE bs.backup_finish_date < @DeleteDate 
    
    
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..restorefile
        FROM msdb..restorefile rf with (nolock)
            INNER JOIN msdb..restorehistory rh with (nolock) ON rf.restore_history_id = rh.restore_history_id
            INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
        WHERE bs.backup_finish_date < @DeleteDate 
        
    end    
end    



print 'DEL restorefilegroup..'  
if exists (select * from msdb.dbo.sysobjects where name = 'restorefilegroup')    
begin 
    
    DELETE top (@Batch) FROM msdb..restorefilegroup
    FROM msdb..restorefilegroup rfg with (nolock)
        INNER JOIN msdb..restorehistory rh with (nolock) ON rfg.restore_history_id = rh.restore_history_id
        INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
    WHERE bs.backup_finish_date  < @DeleteDate 

    
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..restorefilegroup
        FROM msdb..restorefilegroup rfg with (nolock)
            INNER JOIN msdb..restorehistory rh with (nolock) ON rfg.restore_history_id = rh.restore_history_id
            INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
        WHERE bs.backup_finish_date  < @DeleteDate  
    End
End 
    
    
    
print 'Temp table ..'   
SELECT media_set_id, backup_finish_date
    INTO #Temp 
FROM msdb..backupset with (nolock)
WHERE backup_finish_date  < @DeleteDate 


    


print 'DEL backupfile..' 
if exists (select * from msdb.dbo.sysobjects where name = 'backupfile')    
begin 
    
    DELETE top (@Batch) FROM msdb..backupfile
    FROM msdb..backupfile bf with (nolock)
        INNER JOIN msdb..backupset bs with (nolock) ON bf.backup_set_id = bs.backup_set_id
        INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id
    WHERE bs.backup_finish_date  < @DeleteDate 
    
    
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..backupfile
        FROM msdb..backupfile bf with (nolock)
            INNER JOIN msdb..backupset bs with (nolock) ON bf.backup_set_id = bs.backup_set_id
            INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id
        WHERE bs.backup_finish_date  < @DeleteDate      
    End
End 



print 'DEL backupmediafamily..' 
if exists (select * from msdb.dbo.sysobjects where name = 'backupmediafamily')    
begin 
    
    DELETE top (@Batch) FROM msdb..backupmediafamily
    FROM msdb..backupmediafamily bmf with (nolock)
        INNER JOIN msdb..backupmediaset bms with (nolock) ON bmf.media_set_id = bms.media_set_id
        INNER JOIN #Temp t ON bms.media_set_id = t.media_set_id
    
    
    while @@rowcount <> 0    
    begin    
        
        DELETE top (@Batch) FROM msdb..backupmediafamily
        FROM msdb..backupmediafamily bmf with (nolock)
            INNER JOIN msdb..backupmediaset bms with (nolock) ON bmf.media_set_id = bms.media_set_id
            INNER JOIN #Temp t ON bms.media_set_id = t.media_set_id
    End
End 



print 'DEL backupfilegroup..' 
if exists (select * from msdb.dbo.sysobjects where name = 'backupfilegroup')    
begin 
    
    Delete top (@Batch) FROM msdb..backupfilegroup
        FROM msdb..backupfilegroup bfg with (nolock)
        INNER JOIN msdb..backupset bs with (nolock) ON bfg.backup_set_id = bs.backup_set_id
        INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id
    
    
    while @@rowcount <> 0    
    begin    
    
        Delete top (@Batch) FROM msdb..backupfilegroup
        FROM msdb..backupfilegroup bfg with (nolock)
            INNER JOIN msdb..backupset bs with (nolock) ON bfg.backup_set_id = bs.backup_set_id
            INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id

    End
End 
        
    

print 'DEL restorehistory..' 
if exists (select * from msdb.dbo.sysobjects where name = 'restorehistory')    
begin       
    DELETE top (@Batch) FROM msdb..restorehistory
    FROM msdb..restorehistory rh with (nolock)
        INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
    WHERE bs.backup_finish_date  < @DeleteDate 
    
    
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..restorehistory
        FROM msdb..restorehistory rh with (nolock)
            INNER JOIN msdb..backupset bs with (nolock) ON rh.backup_set_id = bs.backup_set_id
        WHERE bs.backup_finish_date  < @DeleteDate 
    
    End
End 
    
    
print 'DEL backupset..' 
if exists (select * from msdb.dbo.sysobjects where name = 'backupset')    
begin   

    DELETE top (@Batch) FROM msdb..backupset
    FROM msdb..backupset bs with (nolock)
        INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id
        
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..backupset
        FROM msdb..backupset bs with (nolock)
            INNER JOIN #Temp t ON bs.media_set_id = t.media_set_id
    
    End
End 
    

print 'DEL backupmediaset..' 
if exists (select * from msdb.dbo.sysobjects where name = 'backupmediaset')    
begin   

    DELETE top (@Batch) FROM msdb..backupmediaset
    FROM msdb..backupmediaset bms with (nolock)
        INNER JOIN #Temp t ON bms.media_set_id = t.media_set_id
        
    while @@rowcount <> 0    
    begin    
    
        DELETE top (@Batch) FROM msdb..backupmediaset
        FROM msdb..backupmediaset bms with (nolock)
            INNER JOIN #Temp t ON bms.media_set_id = t.media_set_id
    
    End
End 
    

DROP TABLE #Temp



print 'Update Statistic on msdb'
-- Updates the statistics for all tables in the database. 
EXEC sp_updatestats
go
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