Phiên sự kiện mở rộng SQL để phát hiện khóa chết

Có cách nào để tăng kích thước của <inputbuf>phần tử trong XML bế tắc được ghi lại bởi phiên sự kiện mở rộng bế tắc không?

Chúng tôi muốn xem truy vấn đầy đủ để giúp xác định vấn đề trong mã Ứng dụng.

Nó dường như bị giới hạn ở 1024 ký tự +/-. Nó có thể được tăng lên?

Xem bên dưới cho XML mẫu. Bạn có thể thấy rằng văn bản truy vấn trong <inputbuf>phần tử bị cắt ở giữa danh sách chọn:

<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>

Bạn có một sqlhandlekhung cho mỗi khung để bạn có thể nhận được truy vấn hoàn chỉnh bằng sys.dm_exec_sql_texthàm:

SELECT text
FROM sys.dm_exec_sql_text(sql_handle)

sys.dm_exec_sql bản

Chẳng hạn, nhận văn bản của một số câu lệnh từ sys.dm_exec_query_stats(stmtstart, stmtend, sqlhandle thay vì statement_start_offset, statement_end_offset, sql_handle trong báo cáo 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

CẬP NHẬT

Nhờ nhận xét hợp lý của @ JohnEisbrener, tôi sẽ nhận thấy rằng thông tin từ DMV sẽ là thực tế cho đến khi bộ đệm truy vấn được xóa. Vì vậy, nếu bạn muốn sử dụng thông tin đó sau khi làm sạch bộ đệm (ví dụ sau khi máy chủ của bạn khởi động lại), bạn phải lưu dữ liệu đó vào một số bảng vĩnh viễn ngay sau khi sự kiện xảy ra.