日期:2014-05-18  浏览次数:21375 次

sql Server 大量数据批量插入 并发 死锁 情况怎么解决啊 这个存储过程能否优化
以下 是存储过程,
其中 Tweeter,Tweets,TweetsCount都存在大量数据,最低千万级的
加了 nolock不行,大家还有什么好的解决办法啊

SQL code

ALTER PROC [dbo].[TweetsAddOrUpdate]
@WebSiteId int,
@TweeterId bigint,
@WebTweetsId nvarchar(50),
@SourceId bigint,
@WebSourceId nvarchar(50),
@Content nvarchar(4000),
@CutWordStatus bit,
@OriginalText nvarchar(4000),
@ForwardCount int,
@CommentCount int,
@TweeterPostType nvarchar(100),
@TweeterPostTime datetime,
@TweetsType int,
@Location nvarchar(50),
@UpdateTime datetime,
@TweetsImportance int,
@ProvinceName nvarchar(50),
@CityName nvarchar(50)
as

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ
BEGIN TRANSACTION
    declare @ProvinceId int
    declare @cityId int
    select @ProvinceId=CityId from City(nolock) where Name=@ProvinceName
    select @cityId=CityId from City(nolock) where Name=@CityName and ParentId=@ProvinceId

    DECLARE @TweetsId bigint
    
    IF not exists (select TweetsId from Tweets(nolock)  where WebTweetsId=@WebTweetsId and WebSiteId=@WebSiteId)
    begin
    INSERT INTO [Tweets]
               ([WebSiteId],[TweeterId],[WebTweetsId],[SourceId]
               ,[WebSourceId],[Content],[OriginalText]
               ,[ForwardCount],[CommentCount],[TweeterPostType]
               ,[TweeterPostTime],[TweetsType],[Location]
               ,[UpdateTime],TweetsImportance,ProvinceId,CityId)
         VALUES
               (@WebSiteId,@TweeterId,@WebTweetsId,@SourceId
               ,@WebSourceId,@Content,@OriginalText
               ,@ForwardCount,@CommentCount,@TweeterPostType
               ,@TweeterPostTime,@TweetsType,@Location
               ,getDate(),@TweetsImportance,@ProvinceId,@cityId)
         SET @TweetsId=@@identity  
    end
    else
    begin
        select @TweetsId=TweetsId from Tweets(nolock)  where WebTweetsId=@WebTweetsId and WebSiteId=@WebSiteId
        update Tweets set ForwardCount=@ForwardCount,CommentCount=@CommentCount,
                UpdateTime=getDate(),TweetsImportance=@TweetsImportance where TweetsId=@TweetsId
    end
   
    update Tweets set SourceId=@TweetsId where WebSourceId=@WebTweetsId
    
    if exists (select TweetsId  from TweetsCounts(nolock)
                where TweetsId=@TweetsId and CONVERT(nvarchar(10),UpdateTime,112)
                =cONVERT(nvarchar(10),GETDATE(),112)
                )
    begin
            update TweetsCounts set ForwardCount=@ForwardCount,CommentCount=@CommentCount where
            CONVERT(nvarchar(10),UpdateTime,112)
                =cONVERT(nvarchar(10),GETDATE(),112)
                and TweetsId=@TweetsId
    end
    else
    begin
        INSERT INTO [TweetsCounts]
               ([TweetsId]
               ,[ForwardCount]
               ,[CommentCount]
               ,[UpdateTime])
         VALUES
               (@TweetsId,@ForwardCount,@CommentCount,GETDATE())
    end
 
    select @TweetsId
    COMMIT TRANSACTION



------解决方案--------------------
用bulkcopy,应该会好些
------解决方案--------------------
小批量处理,化整为零。。。
在一个事务中忌讳操作大量的数据。 循环用小批量处理一批,提交一批。
------解决方案--------------------
sqlbuckcopy自帶事務性功能,專門為大量數據處理的class