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この拡張イベントXMLを可能な限り迅速に細断するにはどうすればよいですか？

SQL Server 2008 R2で拡張イベントセッションを作成しました。セッションは実行され、期待どおりにイベントが発生するたびに収集されます。

イベントが比較的少ないときにxmlを細断すると、パフォーマンスは許容範囲内です。何千ものイベントがある場合、xmlを細断処理す​​るのに永遠にかかります。

私は何か間違ったことをしていることを知っていますが、XMLエンジンの内部について何を理解するのに十分な知識を持っていません。

これは私の拡張イベントセッションの定義です。

IF EXISTS 
(
    SELECT 1 
    FROM sys.server_event_sessions dxs 
    WHERE dxs.name = 'queries'
)
BEGIN
    IF EXISTS (
        SELECT 1 
        FROM sys.dm_xe_sessions dxs 
        WHERE dxs.name = 'queries'
    )
    BEGIN
        ALTER EVENT SESSION queries ON SERVER STATE = STOP;
    END
    DROP EVENT SESSION queries ON SERVER;
END

CREATE EVENT SESSION queries ON SERVER 
ADD EVENT sqlserver.sql_statement_starting
(
    ACTION 
    (
        package0.collect_system_time
        --, package0.event_sequence
        , sqlserver.client_app_name
        , sqlserver.client_hostname
        --, sqlserver.database_name
        , sqlserver.plan_handle
        , sqlserver.sql_text
        , sqlserver.username
    )
    WHERE sqlserver.username = N'<some username>'
        AND sqlserver.database_id = 6 /* specific database */
        AND sqlserver.client_hostname <> '<my machine>'
) 
, ADD EVENT sqlserver.error_reported 
(
    ACTION 
    (
        package0.collect_system_time
        , sqlserver.client_app_name
        , sqlserver.client_hostname
        , sqlserver.plan_handle
        , sqlserver.sql_text
        , sqlserver.username
    )
    WHERE sqlserver.username <> N'<some username>'
        /* fluff errors below */
        AND error <> 5703 /* Changed language setting to %.*ls. */
        AND error <> 5701 /* Changed database context to '%.*ls'. */
        AND error <> 2528 /* DBCC execution completed. If DBCC printed error messages, contact your system administrator. */
        AND error <> 7969 /* No active open transactions. */
        --AND error <> 14205/* (unknown) */
        AND error <> 4035 /* Processed %I64d pages for database '%ls', file '%ls' on file %d. */
        AND error <> 18265/* Log was backed up. Database: %s, creation date(time): %s(%s), first LSN: %s, last LSN: %s, number of dump devices: %d, device information: (%s). This is an informational message only. No user action is required. */
        AND error <> 3014 /* %hs successfully processed %I64d pages in %d.%03d seconds (%d.%03d MB/sec). */
        AND error <> 14570/* (Job outcome) */
        AND error <> 8153 /* Warning: Null value is eliminated by an aggregate or other SET operation. */

)
ADD TARGET package0.ring_buffer
(
    SET max_memory = 102400
)
WITH 
(
    STARTUP_STATE=OFF
    , TRACK_CAUSALITY = ON
);
GO

IF EXISTS 
(
    SELECT 1 
    FROM sys.server_event_sessions dxs 
    WHERE dxs.name = 'queries'
)
BEGIN
    ALTER EVENT SESSION queries ON SERVER STATE = START;
END

これは私が結果を細断する方法です：

/***************************

shred the Event Data into readable form

***************************/

DECLARE @xml XML;

SELECT TOP(1) @xml = CONVERT(xml, xet.target_data)
FROM sys.dm_xe_session_targets AS xet
    INNER JOIN sys.dm_xe_sessions AS xe ON (xe.address = xet.event_session_address)
WHERE xe.name = 'queries';

SELECT t.EventName
    , DateStamp = DATEADD(HOUR, -6, t.EventDateStamp)
    , DatabaseName = d.name
    , t.ErrorNumber
    , t.ErrorSeverity
    , t.ErrorState
    , t.ErrorMessage
    , t.CollectSystemTime
    , t.ClientAppName
    , t.ClientHostName
    , t.PlanHandle
    , t.SqlText
    , t.UserName
FROM (
        SELECT EventName = s.value('(@name)[1]','varchar(500)')
            , EventDateStamp = s.value('(@timestamp)[1]','datetime')
            , DatabaseID = s.value('(data[(@name)[1] eq "source_database_id"]/value/text())[1]','varchar(255)')
            , ErrorNumber = s.value('(data[(@name)[1] eq "error"]/value/text())[1]','int')
            , ErrorSeverity = s.value('(data[(@name)[1] eq "severity"]/value/text())[1]','int')
            , ErrorState = s.value('(data[(@name)[1] eq "state"]/value/text())[1]','int')
            , ErrorMessage = s.value('(data[(@name)[1] eq "message"]/value/text())[1]','varchar(255)')
            , CollectSystemTime = s.value('(action[(@name)[1] eq "collect_system_time"]/text/text())[1]','varchar(255)')
            , ClientAppName = s.value('(action[(@name)[1] eq "client_app_name"]/value/text())[1]','varchar(255)')
            , ClientHostName = s.value('(action[(@name)[1] eq "client_hostname"]/value/text())[1]','varchar(255)')
            , PlanHandle = CONVERT(xml, s.value('(action[(@name)[1] eq "plan_handle"]/value/text())[1]','varchar(255)')).value('(plan/@handle)[1]', 'varchar(255)')
            , SqlText = s.value('(action[(@name)[1] eq "sql_text"]/value/text())[1]','nvarchar(max)')
            , UserName = s.value('(action[(@name)[1] eq "username"]/value/text())[1]','varchar(128)')
        FROM @xml.nodes('/RingBufferTarget/event') AS xm(s)
    ) t
    LEFT JOIN sys.databases d ON t.DatabaseID = d.database_id
ORDER BY t.UserName
    , t.EventDateStamp;
sql-serversql-server-2008-r2xmlextended-events
13
Max Vernon

@ Tom V を特定していただきありがとうございます このブログ投稿 は一時テーブルの必要性を特定しています。

ブログ投稿のアイデアを採用して、これは非常に迅速に機能するようになりました。

/***************************

shred the Event Data into readable form

***************************/

DECLARE @xml XML;

SELECT TOP(1) @xml = CONVERT(xml, xet.target_data)
FROM sys.dm_xe_session_targets AS xet
    INNER JOIN sys.dm_xe_sessions AS xe ON (xe.address = xet.event_session_address)
WHERE xe.name = 'queries';

IF OBJECT_ID('tempdb..#xmlResults') IS NOT NULL
DROP TABLE #xmlResults;

CREATE TABLE #xmlResults
(
    RowNum INT NOT NULL
        PRIMARY KEY CLUSTERED
        IDENTITY(1,1)
    , xeXML XML NOT NULL
);

INSERT INTO #xmlResults (xeXML)
SELECT xm.s.query('.')
FROM @xml.nodes('/RingBufferTarget/event') AS xm(s)
OPTION (Optimize FOR (@xml = Null)); -- Useful for SQL 2008

SELECT *
FROM #xmlResults

SELECT t.EventName
    , DateStamp = DATEADD(HOUR, -6, t.EventDateStamp)
    , DatabaseName = d.name
    , t.ErrorNumber
    , t.ErrorSeverity
    , t.ErrorState
    , t.ErrorMessage
    , t.CollectSystemTime
    , t.ClientAppName
    , t.ClientHostName
    , t.PlanHandle
    , t.SqlText
    , t.UserName
FROM (
        SELECT EventName =          xeXML.value('(event/@name)[1]','varchar(500)')
            , EventDateStamp =      xeXML.value('(event/@timestamp)[1]','datetime')
            , DatabaseID =          xeXML.value('(event/data[(@name)[1] eq "source_database_id"]/value/text())[1]','varchar(255)')
            , ErrorNumber =         xeXML.value('(event/data[(@name)[1] eq "error"]/value/text())[1]','varchar(255)')
            , ErrorSeverity =       xeXML.value('(event/data[(@name)[1] eq "severity"]/value/text())[1]','varchar(255)')
            , ErrorState =          xeXML.value('(event/data[(@name)[1] eq "state"]/value/text())[1]','varchar(255)')
            , ErrorMessage =        xeXML.value('(event/data[(@name)[1] eq "message"]/value/text())[1]','varchar(255)')
            , CollectSystemTime =   xeXML.value('(event/action[(@name)[1] eq "collect_system_time"]/text/text())[1]','varchar(255)')
            , ClientAppName =       xeXML.value('(event/action[(@name)[1] eq "client_app_name"]/value/text())[1]','varchar(255)')
            , ClientHostName =      xeXML.value('(event/action[(@name)[1] eq "client_hostname"]/value/text())[1]','varchar(255)')
            , PlanHandle = CONVERT(xml, xeXML.value('(event/action[(@name)[1] eq "plan_handle"]/value/text())[1]','varchar(255)')).value('(plan/@handle)[1]', 'varchar(255)')
            , SqlText =             xeXML.value('(event/action[(@name)[1] eq "sql_text"]/value/text())[1]','nvarchar(max)')
            , UserName =            xeXML.value('(event/action[(@name)[1] eq "username"]/value/text())[1]','varchar(128)')
        FROM #xmlResults xm
    ) t
    LEFT JOIN sys.databases d ON t.DatabaseID = d.database_id
ORDER BY t.UserName
    , t.EventDateStamp;
11
Max Vernon