SQL Server 2008链接服务器和临时INSERT导致快速内存泄漏，最终导致服务器无响应，并以以下错误结束：
Msg 701, Level 17, State 123, Server BRECK-PC\SQLEXPRESS, Line 2
There is insufficient system memory in resource pool 'internal' to run this
query.
Location: qxcntxt.cpp:1052
Expression: cref == 0
SPID: 51
Process ID: 1880
在重新启动SQL Server之前，服务器仍然没有响应。
正在使用的软件：
Windows Vista Ultimate 64位版本6001 SP1
Microsoft SQL Server 2008（SP1） - 10.0.2734.0（X64）2009年9月11日14:30:58版权所有（c）1988-2008 Microsoft Corporation在Windows NT上具有高级服务（64位）的Express Edition 6.0（Build 6001：Service Pack 1）
SQL Anywhere 11.0.1.2276中的SAOLEDB.11驱动程序
将最大服务器内存（MB）设置为2048无济于事。
将各种-g值（例如-g256;）添加到服务器启动参数没有帮助。
使用DBCC FREESYSTEMCACHE（'ALL'），DBCC FREESESSIONCACHE和DBCC FREEPROCCACHE没有帮助。
将Cumnulative更新包4安装到SQL Server 2008 Service Pack 1没有帮助，即使它包含对涉及链接服务器使用的内存泄漏症状的修复。
从INSERT中分离SELECT ... ROW_NUMBER（）OVER ...查询没有帮助。实验表明复杂的SELECT没有导致内存泄漏，INSERT就是这样。
更改代码以使用ad-hoc“INSERT INTO OPENROWSET”语法而不是链接服务器没有帮助;下面的代码显示了链接服务器的使用情况。
sysinternals.com Process Explore实用程序显示内存使用情况与sqlserver.exe相关联，而不是SQL Anywhere OLEDB驱动程序SAOLEDB.11使用的DLL。
请注意，链接服务器（代理表）的SQL Anywhere版本可以正常工作，以便在单个事务中将190万行从SQL Server 2008表“拉”到SQL Anywhere 11数据库。这里显示的逻辑是尝试使用链接服务器功能“推”行;相同的方向，不同的语法。
代码如下;执行三次或四次EXECUTE copy_mss_t2后，RAM的4G耗尽：
EXEC sys.sp_configure
N'show advanced options',
N'1'
GO
RECONFIGURE WITH OVERRIDE
GO
EXEC sys.sp_configure
N'max server memory (MB)',
N'2048'
GO
RECONFIGURE WITH OVERRIDE
GO
EXEC sys.sp_configure
N'show advanced options',
N'0'
GO
RECONFIGURE WITH OVERRIDE
GO
EXEC master.dbo.sp_MSset_oledb_prop
N'SAOLEDB.11',
N'AllowInProcess',
1
GO
sp_addlinkedserver
@server = 'mem',
@srvproduct = 'SQL Anywhere OLE DB Provider',
@provider = 'SAOLEDB.11',
@datasrc = 'mem_PAVILION2'
GO
EXEC master.dbo.sp_serveroption
@server=N'mem',
@optname=N'rpc',
@optvalue=N'true'
GO
EXEC master.dbo.sp_serveroption
@server=N'mem',
@optname=N'rpc out',
@optvalue=N'true'
GO
sp_addlinkedsrvlogin
@rmtsrvname = 'mem',
@useself = 'false',
@locallogin = NULL,
@rmtuser = 'dba',
@rmtpassword = 'sql'
GO
CREATE PROCEDURE copy_mss_t2
@from_row BIGINT,
@to_row BIGINT,
@rows_copied_count BIGINT OUTPUT
AS
SELECT *
INTO #t
FROM ( SELECT *,
ROW_NUMBER()
OVER ( ORDER BY sample_set_number,
connection_number )
AS t2_row_number
FROM mss_t2 ) AS ordered_mss_t2
WHERE ordered_mss_t2.t2_row_number BETWEEN @from_row AND @to_row;
SELECT @rows_copied_count = COUNT(*)
FROM #t;
INSERT INTO mem..dba.sa_t2
SELECT sampling_id,
sample_set_number,
connection_number,
blocker_owner_table_name,
blocker_lock_type,
blocker_owner_name,
blocker_table_name,
blocker_reason,
blocker_row_identifier,
current_engine_version,
page_size,
ApproximateCPUTime,
BlockedOn,
BytesReceived,
BytesSent,
CacheHits,
CacheRead,
"Commit",
DiskRead,
DiskWrite,
FullCompare,
IndAdd,
IndLookup,
Isolation_level,
LastReqTime,
LastStatement,
LockCount,
LockName,
LockTableOID,
LoginTime,
LogWrite,
Name,
NodeAddress,
Prepares,
PrepStmt,
QueryLowMemoryStrategy,
QueryOptimized,
QueryReused,
ReqCountActive,
ReqCountBlockContention,
ReqCountBlockIO,
ReqCountBlockLock,
ReqCountUnscheduled,
ReqStatus,
ReqTimeActive,
ReqTimeBlockContention,
ReqTimeBlockIO,
ReqTimeBlockLock,
ReqTimeUnscheduled,
ReqType,
RequestsReceived,
Rlbk,
RollbackLogPages,
TempFilePages,
TransactionStartTime,
UncommitOp,
Userid,
previous_ApproximateCPUTime,
interval_ApproximateCPUTime,
previous_Commit,
interval_Commit,
previous_Rlbk,
interval_Rlbk
FROM #t;
GO
DECLARE @rows_copied_count BIGINT
EXECUTE copy_mss_t2 1110001, 1120000, @rows_copied_count OUTPUT
SELECT @rows_copied_count
GO
EXECUTE create_linked_server
GO
DECLARE @rows_copied_count BIGINT
EXECUTE copy_mss_t2 1120001, 1130000, @rows_copied_count OUTPUT
SELECT @rows_copied_count
GO
EXECUTE create_linked_server
GO
这是SQL Server源表，包含190万行中大约1G的数据：
CREATE TABLE mss_t2 (
sampling_id BIGINT NOT NULL,
sample_set_number BIGINT NOT NULL,
connection_number BIGINT NOT NULL,
blocker_owner_table_name VARCHAR ( 257 ) NULL,
blocker_lock_type VARCHAR ( 32 ) NULL,
blocker_owner_name VARCHAR ( 128 ) NULL,
blocker_table_name VARCHAR ( 128 ) NULL,
blocker_reason TEXT NULL,
blocker_row_identifier VARCHAR ( 32 ) NULL,
current_engine_version TEXT NOT NULL,
page_size INTEGER NOT NULL,
ApproximateCPUTime DECIMAL ( 30, 6 ) NULL,
BlockedOn BIGINT NULL,
BytesReceived BIGINT NULL,
BytesSent BIGINT NULL,
CacheHits BIGINT NULL,
CacheRead BIGINT NULL,
"Commit" BIGINT NULL,
DiskRead BIGINT NULL,
DiskWrite BIGINT NULL,
FullCompare BIGINT NULL,
IndAdd BIGINT NULL,
IndLookup BIGINT NULL,
Isolation_level BIGINT NULL,
LastReqTime TEXT NOT NULL DEFAULT '1900-01-01',
LastStatement TEXT NULL,
LockCount BIGINT NULL,
LockName BIGINT NULL,
LockTableOID BIGINT NULL,
LoginTime TEXT NOT NULL DEFAULT '1900-01-01',
LogWrite BIGINT NULL,
Name VARCHAR ( 128 ) NULL,
NodeAddress TEXT NULL,
Prepares BIGINT NULL,
PrepStmt BIGINT NULL,
QueryLowMemoryStrategy BIGINT NULL,
QueryOptimized BIGINT NULL,
QueryReused BIGINT NULL,
ReqCountActive BIGINT NULL,
ReqCountBlockContention BIGINT NULL,
ReqCountBlockIO BIGINT NULL,
ReqCountBlockLock BIGINT NULL,
ReqCountUnscheduled BIGINT NULL,
ReqStatus TEXT NULL,
ReqTimeActive DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockContention DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockIO DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockLock DECIMAL ( 30, 6 ) NULL,
ReqTimeUnscheduled DECIMAL ( 30, 6 ) NULL,
ReqType TEXT NULL,
RequestsReceived BIGINT NULL,
Rlbk BIGINT NULL,
RollbackLogPages BIGINT NULL,
TempFilePages BIGINT NULL,
TransactionStartTime TEXT NOT NULL DEFAULT '1900-01-01',
UncommitOp BIGINT NULL,
Userid VARCHAR ( 128 ) NULL,
previous_ApproximateCPUTime DECIMAL ( 30, 6 ) NOT NULL DEFAULT 0.0,
interval_ApproximateCPUTime AS ( COALESCE ( "ApproximateCPUTime", 0 ) - previous_ApproximateCPUTime ),
previous_Commit BIGINT NOT NULL DEFAULT 0,
interval_Commit AS ( COALESCE ( "Commit", 0 ) - previous_Commit ),
previous_Rlbk BIGINT NOT NULL DEFAULT 0,
interval_Rlbk AS ( COALESCE ( Rlbk, 0 ) - previous_Rlbk ) )
以下是SQL Anywhere 11中的目标表：
CREATE TABLE sa_t2 (
sampling_id BIGINT NOT NULL,
sample_set_number BIGINT NOT NULL,
connection_number BIGINT NOT NULL,
blocker_owner_table_name VARCHAR ( 257 ) NULL,
blocker_lock_type VARCHAR ( 32 ) NULL,
blocker_owner_name VARCHAR ( 128 ) NULL,
blocker_table_name VARCHAR ( 128 ) NULL,
blocker_reason TEXT NULL,
blocker_row_identifier VARCHAR ( 32 ) NULL,
current_engine_version TEXT NOT NULL,
page_size INTEGER NOT NULL,
ApproximateCPUTime DECIMAL ( 30, 6 ) NULL,
BlockedOn BIGINT NULL,
BytesReceived BIGINT NULL,
BytesSent BIGINT NULL,
CacheHits BIGINT NULL,
CacheRead BIGINT NULL,
"Commit" BIGINT NULL,
DiskRead BIGINT NULL,
DiskWrite BIGINT NULL,
FullCompare BIGINT NULL,
IndAdd BIGINT NULL,
IndLookup BIGINT NULL,
Isolation_level BIGINT NULL,
LastReqTime TEXT NOT NULL DEFAULT '1900-01-01',
LastStatement TEXT NULL,
LockCount BIGINT NULL,
LockName BIGINT NULL,
LockTableOID BIGINT NULL,
LoginTime TEXT NOT NULL DEFAULT '1900-01-01',
LogWrite BIGINT NULL,
Name VARCHAR ( 128 ) NULL,
NodeAddress TEXT NULL,
Prepares BIGINT NULL,
PrepStmt BIGINT NULL,
QueryLowMemoryStrategy BIGINT NULL,
QueryOptimized BIGINT NULL,
QueryReused BIGINT NULL,
ReqCountActive BIGINT NULL,
ReqCountBlockContention BIGINT NULL,
ReqCountBlockIO BIGINT NULL,
ReqCountBlockLock BIGINT NULL,
ReqCountUnscheduled BIGINT NULL,
ReqStatus TEXT NULL,
ReqTimeActive DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockContention DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockIO DECIMAL ( 30, 6 ) NULL,
ReqTimeBlockLock DECIMAL ( 30, 6 ) NULL,
ReqTimeUnscheduled DECIMAL ( 30, 6 ) NULL,
ReqType TEXT NULL,
RequestsReceived BIGINT NULL,
Rlbk BIGINT NULL,
RollbackLogPages BIGINT NULL,
TempFilePages BIGINT NULL,
TransactionStartTime TEXT NOT NULL DEFAULT '1900-01-01',
UncommitOp BIGINT NULL,
Userid VARCHAR ( 128 ) NULL,
previous_ApproximateCPUTime DECIMAL ( 30, 6 ) NOT NULL DEFAULT 0.0,
interval_ApproximateCPUTime DECIMAL ( 30, 6 ) NOT NULL COMPUTE ( COALESCE ( "ApproximateCPUTime", 0 ) - previous_ApproximateCPUTime ),
previous_Commit BIGINT NOT NULL DEFAULT 0,
interval_Commit BIGINT NOT NULL COMPUTE ( COALESCE ( "Commit", 0 ) - previous_Commit ),
previous_Rlbk BIGINT NOT NULL DEFAULT 0,
interval_Rlbk BIGINT NOT NULL COMPUTE ( COALESCE ( Rlbk, 0 ) - previous_Rlbk ),
PRIMARY KEY ( sample_set_number, connection_number ) );
答案 0 :(得分：8)
每次迭代后，您是否需要清空临时表#t？即在程序结束时添加TRUNCATE TABLE #t？我认为临时表#t在您的会话结束之前一直存在，直到存储过程结束。 SELECT INTO只是附加到现有的#t，但不会替换它。
另一件事是使用永久表而不是存储在tempdb #tables中的东西。
答案 1 :(得分：2)
问题是通过SQL Anywhere 11.0.1提供程序SAOLEDB.11使用链接服务器将数据插入声明为大于VARCHAR（8000）的目标列。这是一个简化的可重复的：
-- Overview: SQL Server 2008 suffers from a fatal memory leak
-- if an attempt is made to use a linked server and the
-- SAOLEDB.11 provicer to copy data from SQL Server
-- to a SQL Anywhere 11.0.1 table that contains a single column
-- larger than VARCHAR ( 8000 ); i.e, a VARCHAR ( 8000 ) target
-- column is OK but VARCHAR ( 8001 ) is not. The actual string
-- length is not an issue, nor is the fact that the SQL Server
-- column is declared as TEXT. The memory leak is faster if
-- there is more than one target column larger than VARCHAR ( 8000 ).
-- The server computer freezes and must be rebooted.
-- Msg 701, Level 17, State 123, Server BRECK-PC\SQLEXPRESS, Line 2
-- There is insufficient system memory in resource pool 'internal' to run this
-- query.
-- Location: qxcntxt.cpp:1052
-- Expression: cref == 0
-- SPID: 52
-- Process ID: 2044
---------------------------------------------------------
-- SQL ANYWHERE 11 on target computer
---------------------------------------------------------
-- Target:
-- HP Pavilion laptop, 4GHz Pentium 4, 2G RAM
-- Windows XP SP2
-- SQL Anywhere 11.0.1.2276
---------------------------------------------------------
-- Windows commands used to create and start in-memory database
/*
"%SQLANY11%\bin32\dbinit.exe"^
mem.db
"%SQLANY11%\bin32\dbspawn.exe" -f^
"%SQLANY11%\bin32\dbsrv11.exe"^
-im nw^
-o dbsrv11_log.txt^
mem.db
"%SQLANY11%\bin32\dbisql.com"^
-c "ENG=mem;DBN=mem;UID=dba;PWD=sql;CON=mem-1"
*/
---------------------------------------------------------
-- Create target table with one single "long" column.
BEGIN
DROP TABLE sa_target;
EXCEPTION WHEN OTHERS THEN
END;
CREATE TABLE sa_target (
primary_key INTEGER NOT NULL PRIMARY KEY,
string_column_1 VARCHAR ( 8001 ) NOT NULL );
---------------------------------------------------------
--- SQL SERVER 2008 on source (server) computer
---------------------------------------------------------
-- Server:
-- Desktop with Intel Core 2 Quad Q9450 2.66Ghz 4G RAM
-- Windows Vista Ultimate 64 bit build 6001 SP1
-- SQL Server 2008 Express 64 Service Pack 1 with cumulative update package 4:
-- Microsoft SQL Server 2008 (SP1) - 10.0.2734.0 (X64) Sep 11 2009 14:30:58
-- Copyright (c) 1988-2008 Microsoft Corporation Express Edition with
-- Advanced Services (64-bit) on Windows NT 6.0 <X64>
-- (Build 6001: Service Pack 1)
-- SAOLEDB.11 driver from SQL Anywhere 11.0.1.2276
---------------------------------------------------------
-- Windows command used to start osql.exe
/*
"c:\Program Files\Microsoft SQL Server\100\Tools\Binn\osql.exe"^
-d main^
-I^
-l 10^
-P j68Fje9#fyu489^
-S BRECK-PC\SQLEXPRESS^
-U sa
*/
---------------------------------------------------------
-- Create database.
USE master
GO
BEGIN TRY
DROP DATABASE main;
END TRY
BEGIN CATCH
END CATCH;
GO
CREATE DATABASE main
ON PRIMARY
( NAME = main_dat,
FILENAME = 'E:\data\main\main.mdf',
SIZE = 2GB,
FILEGROWTH = 200MB )
LOG ON
( NAME = 'main_log',
FILENAME = 'E:\data\main\main.ldf',
SIZE = 2GB,
FILEGROWTH = 200MB )
GO
----------------------------------------------------------------------------
-- Configure SAOLEDB.11 provider.
USE master
go
-- SAOLEDB.11 provider dlls registered via these Windows commands:
-- regsvr32 dboledb11.dll
-- regsvr32 dboledba11.dll
EXEC master.dbo.sp_MSset_oledb_prop N'SAOLEDB.11', N'AllowInProcess', 1
GO
-- If the following statement produces this message, it probably means
-- that 'DisallowAdHocAccess' is already set to zero for SAOLEDB.11:
--
-- RegDeleteValue() returned error 2, 'The system cannot find the file specified.'
EXEC master.dbo.sp_MSset_oledb_prop N'SAOLEDB.11', N'DisallowAdHocAccess', 0
GO
----------------------------------------------------------------------------
-- THIS SECTION WAS NOT RUN.
-- Set up for OPENROWSET usage.
-- NOT REQUIRED for required for Linked Server usage.
USE master
GO
sp_configure 'show advanced options', 1
GO
RECONFIGURE
GO
sp_configure 'Ad Hoc Distributed Queries', 1
GO
RECONFIGURE
GO
----------------------------------------------------------------------------
-- Set up Linked Server usage.
USE main
GO
BEGIN TRY
EXEC sp_droplinkedsrvlogin
@rmtsrvname = 'mem',
@locallogin = NULL
END TRY
BEGIN CATCH
END CATCH
GO
BEGIN TRY
EXEC sp_dropserver
@server = 'mem'
END TRY
BEGIN CATCH
END CATCH
GO
EXEC sp_addlinkedserver
@server = 'mem',
@srvproduct = 'SQL Anywhere OLE DB Provider',
@provider = 'SAOLEDB.11',
@datasrc = 'mem_PAVILION2'
GO
EXEC master.dbo.sp_serveroption
@server=N'mem',
@optname=N'rpc',
@optvalue=N'true'
GO
EXEC master.dbo.sp_serveroption
@server=N'mem',
@optname=N'rpc out',
@optvalue=N'true'
GO
EXEC sp_addlinkedsrvlogin
@rmtsrvname = 'mem',
@useself = 'false',
@locallogin = NULL,
@rmtuser = 'dba',
@rmtpassword = 'sql'
GO
----------------------------------------------------------------------------
-- Create and fill source table with 1 million rows.
USE main
GO
BEGIN TRY
DROP TABLE mss_source;
END TRY
BEGIN CATCH
END CATCH
GO
CREATE TABLE mss_source (
primary_key INTEGER NOT NULL PRIMARY KEY,
string_column_1 TEXT NOT NULL )
GO
BEGIN
DECLARE @primary_key INTEGER
SELECT @primary_key = 1
BEGIN TRANSACTION
WHILE @primary_key <= 1000000
BEGIN
INSERT mss_source VALUES (
@primary_key,
REPLICATE ( 'Some test data. ', 2 ) )
SELECT @primary_key = @primary_key + 1
END
COMMIT
END
GO
SELECT COUNT(*) FROM mss_source
GO
-- 1000000
---------------------------------------------------------
-- Copy data to target table.
SELECT CURRENT_TIMESTAMP
GO
INSERT INTO mem..dba.sa_target
SELECT *
FROM mss_source
GO
SELECT CURRENT_TIMESTAMP
GO
---------------------------------------------------------
-- Test 1 - Code as shown above.
-- FAILED
--
-- Started at 2009-10-12 10:06:33.393
--
-- A slow server memory leak began immediately.
-- The initial target insert rate was about 2000 rows per second.
-- Server RAM usage reached 3.82 GB, Physical Memory: 95%, Page File 16236M / 16288M
-- The server display became frozen.
-- The server became unresponsive to mouse input.
-- The target insert rate dropped below 1000 rows per second, but inserts continued.
-- The copy process reached 937,817 rows inserted on the target.
-- This dialog box appeared on the server: "Your computer is low on memory"
-- Eventually, the process failed, and this message appeared in the osql.exe window:
--
-- Msg 701, Level 17, State 123, Server BRECK-PC\SQLEXPRESS, Line 2
-- There is insufficient system memory in resource pool 'internal' to run this
-- query.
-- Location: qxcntxt.cpp:1052
-- Expression: cref == 0
-- SPID: 52
-- Process ID: 2044
--
-- Failed at 2009-10-12 10:22:21.817
-- The server disk I/O light remained lit without interruption.
-- The server required a hard reboot.
---------------------------------------------------------
-- Test 2 - Code as shown above, except for VARCHAR ( 8000 ).
-- SUCCESSFUL
BEGIN
DROP TABLE sa_target;
EXCEPTION WHEN OTHERS THEN
END;
CREATE TABLE sa_target (
primary_key INTEGER NOT NULL PRIMARY KEY,
string_column_1 VARCHAR ( 8000 ) NOT NULL );
-- Started at 2009-10-12 10:41:46.427
-- There was some slight initial growth in RAM usage on the server.
-- Server RAM usage stabilized at 1.40 GB, Physical Memory: 35%, Page File 1560M / 8352M
-- The target insert rate remained about 2000 rows per second throughout.
-- Finished OK at 2009-10-12 10:50:52.240
---------------------------------------------------------
-- Test 3 - Repeat Test 2
-- SUCCESSFUL
-- Started at 2009-10-12 10:53:38.350
-- No further RAM usage growth on the server.
-- Finished OK at 2009-10-12 11:02:10.457
答案 2 :(得分：0)
您可以尝试一次批量运行插入而不是整个数据集。
答案 3 :(得分：0)
您可以尝试使用变量表吗？
而不是使用临时表例如。
DECLARE @ResultTable TABLE (TableId INT PRIMARY KEY, ... etc)
INSERT INTO @ResultTable
SELECT TableId, ....
FROM mss_t2
... etc. ...
答案 4 :(得分：0)
我遇到了类似的问题，我的代码在循环中包含一个简单的#temp表的使用，导致了这个问题，我用永久表替换了。
似乎正在发挥作用。
由于 纳温