How is MSSQL using memory?
How is MSSQL using memory?
http://www.sqlhacks.com/Administration/Memory-Usage
Memory is one the most important factor affecting MSSQL performance.
As an administrator, you should be monitoring the memory
regularly. When Microsoft SQL Server runs out of memory, it will use
virtual memory: ie: disk paging, which will grind MSSQL to a halt.
You can keep track of the memory with dbcc memorystatus
.
Applies to:
Microsoft SQL Server 2005
Microsoft SQL Server 2008
Memorystatus
DBCC
MEMORYSTATUS
Memory Manager KB
------------------------------ --------------------
VM Reserved 538308
VM Committed 129888
AWE Allocated 0
Reserved Memory 1024
Reserved Memory In Use 0
(5 row(s) affected)
Memory node Id = 0 KB
------------------------------ --------------------
VM Reserved 534148
VM Committed 125880
AWE Allocated 0
MultiPage Allocator 7688
SinglePage Allocator 21808
(5 row(s) affected)
MEMORYCLERK_SQLGENERAL (Total) KB
---------------------------------------------------------------- --------------------
VM Reserved 0
VM Committed 0
AWE Allocated 0
SM Reserved 0
SM Commited 0
SinglePage Allocator 952
MultiPage Allocator 1544
(7 row(s) affected)
MEMORYCLERK_SQLBUFFERPOOL (Total) KB
---------------------------------------------------------------- --------------------
VM Reserved 523596
VM Co
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语法
CREATE PROC[ EDURE ] [ owner. ] procedure_name [ ; number ]
[ { @parameter data_type }
[ VARYING ] [ = default ] [ OUTPUT ]
&n ......
今天在聊天系统中需要系统执行一个多层嵌套查询。
一开始语句如下总出现错误：原来是在]='123') 后我多加了一个 as tb1
改为如下后，正确运行。
select * from ( select top(10) * from ( select top(100) * from (select [chatcontent].[senderid],[chatcontent].[id] ,[chatcontent].[toid] ,[chatc ......
数据类型
类型
描述
bit
整型
bit 数据类型是整型，其值只能是0、1或空值。这种数据类型用于存储只有两种可能值的数据 ，如Yes 或No、True 或Fa lse 、On 或Off
int
整型
int 数据类型可以存储从- 231( ......
1.
--将汉字转换为拼音首字母
CREATE function GetAllPY(@str nvarchar(4000))
returns nvarchar(4000)
--WITH ENCRYPTION
as
begin
declare @intLen int
declare @strRet nvarchar(4000)
declare @temp nvarchar(100)
set @intLen &nb ......
