资源池"内部"中的系统内存不足

Question

资源池"内部"中的系统内存不足

Bre*_*ter 14 oledb memory-leaks linked-server sql-server-2008

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

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在重新启动SQL Server之前,服务器仍然没有响应.

使用的软件:

Windows Vista Ultimate 64位构建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 6.0上具有高级服务(64位)的Express Edition(Build 6001:Service包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没有帮助.

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没有引起内存泄漏,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的服务器用法.

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,4G的RAM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

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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 ) )

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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 ) );

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Answer 1

Dam*_*mon 8

#t每次迭代后都不需要清空临时表吗？即TRUNCATE TABLE #t在程序结束时添加一个？我认为临时表#t存在直到会话结束,直到存储过程结束.SELECT INTO只是附加到现有#t,但不替代它.

另一件事是使用永久表而不是存储在tempdb中的东西#tables.

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