问题
SQL Server 2008 Linked Server and ad-hoc INSERTs cause a rapid memory leak which eventually causes the server to become non-responsive and ends with the following error:
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
The server remains non-responsive until SQL Server is restarted.
Software in use:
Windows Vista Ultimate 64 bit build 6001 SP1
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 (Build 6001: Service Pack 1)
SAOLEDB.11 driver from SQL Anywhere 11.0.1.2276
Setting max server memory (MB) to 2048 did not help.
Adding various -g values (e.g., -g256;) to the server Startup Parameters did not help.
Using DBCC FREESYSTEMCACHE ( 'ALL' ), DBCC FREESESSIONCACHE and DBCC FREEPROCCACHE did not help.
Installing the Cumnulative update package 4 to SQL Server 2008 Service Pack 1 did not help, even though it contained a fix to a memory leak symptom involving Linked Server usage.
Separating the SELECT ... ROW_NUMBER() OVER ... query from the INSERT did not help. Experimentation showed that the complex SELECT did not cause the memory leak, the INSERT did.
Changing the code to use the ad-hoc "INSERT INTO OPENROWSET" syntax instead of a linked server did not help; the code below shows the linked server usage.
The sysinternals.com Process Explore utility shows that the memory usage was associated with sqlserver.exe, not the DLLs used by the SQL Anywhere OLEDB driver SAOLEDB.11.
Note that the SQL Anywhere version of linked server (proxy tables) works OK, to "pull" 1.9 million rows from a SQL Server 2008 table to a SQL Anywhere 11 database in a single transaction. The logic shown here is an attempt to use the linked server feature to "push" the rows; same direction, different syntax.
The code follows; 4G of RAM is exhausted after three or four executions of the EXECUTE copy_mss_t2:
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
Here is the SQL Server source table, containing about 1G of data in 1.9 million rows:
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 ) )
Here is the target table in SQL Anywhere 11:
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 ) );
回答1:
Don't you need to empty the temp table #t after each iteration? i.e. add a TRUNCATE TABLE #t at the end of your procedure? I think that temp table #t exists until your session ends, not until the stored procedure ends. SELECT INTO just appends to the existing #t, but does not replace it.
Another thing would be to use a permanent table not something stored in tempdb #tables.
回答2:
The problem is using a linked server via the SQL Anywhere 11.0.1 provider SAOLEDB.11 to insert data into a target column declared as larger than VARCHAR ( 8000 ). Here is a simplified reproducible:
-- 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
回答3:
You could try running the insert in batches instead of the whole dataset at once.
回答4:
Instead of using Temp Tables, can you try using Variable tables?
eg.
DECLARE @ResultTable TABLE (TableId INT PRIMARY KEY, ... etc)
INSERT INTO @ResultTable
SELECT TableId, ....
FROM mss_t2
... etc. ...
回答5:
I had a similar problem, my code contains usage of a simple #temp table in a loop, that caused this and I replaced with a permanent table.
Seems to be working.
Thanks Naveen
来源：https://stackoverflow.com/questions/1537812/there-is-insufficient-system-memory-in-resource-pool-internal