[英]issue with locking of database
我们的数据库存在严重问题。 我们正在使用具有2008兼容性的SQL Server 2014。
每天早上,我们都会遇到数据库锁定问题,并且数据库使用100%的CPU。 因此,我们每天早上要解决的问题是修改下面的存储过程,并在从语句中添加和删除NoLock
之间进行切换,然后再次运行过程,数据库很高兴。 因此,我们不确定为什么有时需要添加NoLock
,有时不需要添加。
ALTER Procedure [dbo].[ScanBox]
(
@KollieID varchar(50) = '',
@SupplierID int = 0,
@BuyerID int = 0
)
As
Set NoCount On
IF @kollieid <> '' AND @supplierid >0
BEGIN
SELECT TRPO_KollieID.ID, OrderID, ISNULL(BoxNo, - 1) AS BoxNo, ISNULL(KollieID, '') AS KollieID, KollieNumber,
ISNULL(LastStatus, - 1) AS LastStatus, LastStatusTime, ISNULL(LastStatusPDA, - 1) AS LastStatusPDA,
ISNULL(LastStatusTDLogin, '') AS LastStatusTDLogin, ISNULL(OrginalKollieID,'') AS OrginalKollieID,
ISNULL(OS.StatusName, '') AS LastStatusText , ISNULL(OrderStatusExternalText,'') AS OrderStatusExternalText ,
ISNULL(Terminal, '') AS Terminal, ISNULL(TerminalZone,'') AS TerminalZone
FROM TRPO_KollieID
WITH (NOLOCK)
LEFT OUTER JOIN OrderStatus os WITH (NOLOCK) on OS.StatusID = TRPO_KollieID.LastStatus
WHERE TRPO_KollieID.KollieID = @KollieID AND (OrderID IN (SELECT TRPO_Header.ID
FROM TRPO_Header WITH (NOLOCK)
INNER JOIN TRPO_KollieID WITH (NOLOCK) ON TRPO_KollieID.OrderID = TRPO_Header.ID
WHERE TRPO_Header.SupplierID = @supplierid AND TRPO_Header.Status <> 'A' AND TRPO_KollieID.KollieID = @kollieid))
END
ELSE IF @kollieid <> '' AND @BuyerID >0
BEGIN
SELECT TRPO_KollieID.ID, OrderID, ISNULL(BoxNo, - 1) AS BoxNo, ISNULL(KollieID, '') AS KollieID, KollieNumber,
ISNULL(LastStatus, - 1) AS LastStatus, LastStatusTime, ISNULL(LastStatusPDA, - 1) AS LastStatusPDA,
ISNULL(LastStatusTDLogin, '') AS LastStatusTDLogin, ISNULL(OrginalKollieID,'') AS OrginalKollieID,
ISNULL(OS.StatusName, '') AS LastStatusText , ISNULL(OrderStatusExternalText,'') AS OrderStatusExternalText ,
ISNULL(Terminal, '') AS Terminal, ISNULL(TerminalZone,'') AS TerminalZone
FROM TRPO_KollieID
WITH (NOLOCK)
LEFT OUTER JOIN OrderStatus os WITH (NOLOCK) on OS.StatusID = TRPO_KollieID.LastStatus
WHERE TRPO_KollieID.KollieID = @KollieID AND OrderID IN (SELECT TRPO_Header.ID
FROM TRPO_Header WITH (NOLOCK)
INNER JOIN TRPO_KollieID WITH (NOLOCK) ON TRPO_KollieID.OrderID = TRPO_Header.ID
WHERE TRPO_Header.BuyerID = @BuyerID AND TRPO_Header.Status <> 'A' AND TRPO_KollieID.KollieID = @kollieid)
END
我们尝试过的是
没有任何帮助。 有谁有很好的主意来解决这个问题?
重新编译可以帮助您,而不是无锁。 尝试添加OPTION(RECOMPILE)或OPTION(OPTIMIZE)...或获取查询paln
如果您使用的是“ 读取提交的快照隔离级别” ,则这意味着读取器不会阻止写入器,而写入器也不会阻止读取器。 因此,在这种情况下, nolock
提示是无用的,我建议您删除它们。
我认为基本问题是锁定以外的事情,也许此存储过程执行速度慢且使用许多服务器资源。
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