Rozszerzona sesja SQL dla wykrywania zakleszczenia

Czy istnieje sposób na zwiększenie rozmiaru <inputbuf>elementu w impasie XML przechwyconym przez sesję zdarzeń rozszerzonych impasu?

Chcemy zobaczyć pełne zapytanie, które pomoże wskazać problem w kodzie aplikacji.

Wydaje się być ograniczony do 1024 znaków +/-. Czy można to zwiększyć?

Przykładowy kod XML znajduje się poniżej. Możesz zobaczyć, że tekst zapytania w <inputbuf>elemencie jest ucięty na środku listy wyboru:

<deadlock>
 <victim-list>
  <victimProcess id="processc9c0829848" />
 </victim-list>
 <process-list>
  <process id="processc9c0829848" taskpriority="0" logused="0" waitresource="PAGE: 5:1:40600276 " waittime="696" ownerId="255115931225" transactionname="SELECT" lasttranstarted="2019-04-24T09:29:25.950" XDES="0xc8dfa8da40" lockMode="S" schedulerid="13" kpid="8480" status="suspended" spid="245" sbid="2" ecid="0" priority="0" trancount="0" lastbatchstarted="2019-04-24T09:29:25.950" lastbatchcompleted="2019-04-24T09:29:25.950" lastattention="1900-01-01T00:00:00.950" clientapp="EntityFramework" hostname="MSR-PRD-BDB02" hostpid="43440" loginname="IUSR_BuildDB" isolationlevel="read committed (2)" xactid="255115931225" currentdb="5" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="1" stmtstart="66" stmtend="7378" sqlhandle="0x02000000638e8b1acc45f82c476cd42914e32866e87c4fd60000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@p__linq__0 int,@p__linq__1 int)SELECT 
[Project1].[CachedBuildStateId] AS [CachedBuildStateId], 
[Project1].[BuildVersionId1] AS [BuildVersionID], 
[Project1].[ProjectID] AS [ProjectID], 
[Project1].[VersionName] AS [VersionName], 
[Project1].[PlatformID] AS [PlatformID], 
[Project1].[VersionPath] AS [VersionPath], 
[Project1].[RegionID] AS [RegionID], 
[Project1].[TestStatusID] AS [TestStatusID], 
[Project1].[TestResult] AS [TestResult], 
[Project1].[TestReportPath] AS [TestReportPath], 
[Project1].[TypeID] AS [TypeID], 
[Project1].[Size] AS [Size], 
[Project1].[VersionDate] AS [VersionDate], 
[Project1].[Approved] AS [Approved], 
[Project1].[Archived] AS [Archived], 
[Project1].[CLData] AS [CLData], 
[Project1].[CLCode] AS [CLCode], 
[Project1].[CLSound] AS [CLSound], 
[Project1].[XDKSDKVersion] AS [XDKSDKVersion], 
[Project1].[Comments] AS [Comments], 
[Project1].[DateAdded] AS [DateAdded], 
[Project1].[DateModified] AS [DateModified], 
[Project1].[CacheLocally] AS [CacheLocally],   </inputbuf>
  </process>
  <process id="processc9bf5cf468" taskpriority="0" logused="436" waitresource="PAGE: 5:1:3752363 " waittime="724" ownerId="255115931408" transactionname="user_transaction" lasttranstarted="2019-04-24T09:29:25.973" XDES="0xcf6b186408" lockMode="IX" schedulerid="25" kpid="11228" status="suspended" spid="209" sbid="2" ecid="0" priority="0" trancount="2" lastbatchstarted="2019-04-24T09:29:25.973" lastbatchcompleted="2019-04-24T09:29:25.970" lastattention="1900-01-01T00:00:00.970" clientapp="EntityFramework" hostname="MSR-PRD-BDB04" hostpid="6248" loginname="IUSR_BuildDB" isolationlevel="read committed (2)" xactid="255115931408" currentdb="5" lockTimeout="4294967295" clientoption1="671088672" clientoption2="128056">
   <executionStack>
    <frame procname="adhoc" line="1" stmtstart="78" stmtend="408" sqlhandle="0x020000009438fe362ae846385f4e36448d4eac52a5f052e10000000000000000000000000000000000000000">
unknown    </frame>
    <frame procname="unknown" line="1" sqlhandle="0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000">
unknown    </frame>
   </executionStack>
   <inputbuf>
(@0 int,@1 datetime,@2 datetime,@3 int)update [dbo].[CachedBuildState]
set [CachingStatusId] = @0, [StartTimeUtc] = @1, [LastUpdateTimeUtc] = @2, [MessageDetails] = null
where ([CachedBuildStateId] = @3)
   </inputbuf>
  </process>
 </process-list>
 <resource-list>
  <pagelock fileid="1" pageid="40600276" dbid="5" subresource="FULL" objectname="BuildDB.dbo.CachedBuildState" id="lockcda4d62280" mode="IX" associatedObjectId="72057594075283456">
   <owner-list>
    <owner id="processc9bf5cf468" mode="IX" />
   </owner-list>
   <waiter-list>
    <waiter id="processc9c0829848" mode="S" requestType="wait" />
   </waiter-list>
  </pagelock>
  <pagelock fileid="1" pageid="3752363" dbid="5" subresource="FULL" objectname="BuildDB.dbo.CachedBuildState" id="lockd70db08700" mode="S" associatedObjectId="72057594075283456">
   <owner-list>
    <owner id="processc9c0829848" mode="S" />
   </owner-list>
   <waiter-list>
    <waiter id="processc9bf5cf468" mode="IX" requestType="wait" />
   </waiter-list>
  </pagelock>
 </resource-list>
</deadlock>

Masz sqlhandledla każdej ramki, więc możesz uzyskać pełne zapytanie za pomocą sys.dm_exec_sql_textfunkcji:

SELECT text
FROM sys.dm_exec_sql_text(sql_handle)

sys.dm_exec_sql_text

Na przykład pobieranie tekstu niektórych instrukcji z sys.dm_exec_query_stats(stmtstart, stmtend, sqlhandle zamiast statement_start_offset, statement_end_offset, sql_handle w raporcie XML)

SELECT TOP (100)
    CASE   
        WHEN s.[statement_start_offset] > 0 THEN  
            --The start of the active command is not at the beginning of the full command text 
            CASE s.[statement_end_offset]  
               WHEN -1 THEN  
                  --The end of the full command is also the end of the active statement 
                  SUBSTRING(t.TEXT, (s.[statement_start_offset]/2) + 1, 2147483647) 
               ELSE   
                  --The end of the active statement is not at the end of the full command 
                  SUBSTRING(t.TEXT, (s.[statement_start_offset]/2) + 1, (s.[statement_end_offset] - s.[statement_start_offset])/2+1)   
            END  
        ELSE  
            --1st part of full command is running 
            CASE s.[statement_end_offset]  
               WHEN -1 THEN  
                  --The end of the full command is also the end of the active statement 
                  RTRIM(LTRIM(t.[text]))  
               ELSE  
                  --The end of the active statement is not at the end of the full command 
                  LEFT(t.TEXT, (s.[statement_end_offset]/2) +1)  
            END  
        END AS [executing statement]
FROM sys.dm_exec_query_stats s 
    CROSS APPLY sys.dm_exec_sql_text(s.[sql_handle]) t

UPD

Dzięki rozsądnemu komentarzowi @ JohnEisbrener powinienem zauważyć, że informacje z DMV będą aktualne, dopóki pamięć podręczna zapytania nie zostanie wyczyszczona. Jeśli więc spodziewasz się użyć tych informacji po czyszczeniu pamięci podręcznej (na przykład po ponownym uruchomieniu serwera), musisz zapisać te dane w jakiejś stałej tabeli natychmiast po wystąpieniu zdarzenia.