Question

我的SQL Server 2014中的tempdb大约有1 TB的空间。

早上我看到一些警告说＆＃34; tempdb是Full＆＃34;。我知道有很多查询在夜间运行，并且很少有查询在tempdb中创建了很多临时表和临时变量。在早上，我没有看到任何查询正在运行，并且tempdb处于正常状态。

有没有办法获取导致tempdb问题的查询列表？或者以任何方式检查昨晚的查询？

Answer 1

您需要根据频率运行此查询并将其转储到某个表中以供以后分析。

SELECT
  sys.dm_exec_sessions.session_id AS [SESSION ID]
  ,DB_NAME(database_id) AS [DATABASE Name]
  ,HOST_NAME AS [System Name]
  ,program_name AS [Program Name]
  ,login_name AS [USER Name]
  ,status
  ,cpu_time AS [CPU TIME (in milisec)]
  ,total_scheduled_time AS [Total Scheduled TIME (in milisec)]
  ,total_elapsed_time AS    [Elapsed TIME (in milisec)]
  ,(memory_usage * 8)      AS [Memory USAGE (in KB)]
  ,(user_objects_alloc_page_count * 8) AS [SPACE Allocated FOR USER Objects (in KB)]
  ,(user_objects_dealloc_page_count * 8) AS [SPACE Deallocated FOR USER Objects (in KB)]
  ,(internal_objects_alloc_page_count * 8) AS [SPACE Allocated FOR Internal Objects (in KB)]
  ,(internal_objects_dealloc_page_count * 8) AS [SPACE Deallocated FOR Internal Objects (in KB)]
  ,CASE is_user_process
             WHEN 1      THEN 'user session'
             WHEN 0      THEN 'system session'
  END         AS [SESSION Type], row_count AS [ROW COUNT]
FROM 
  sys.dm_db_session_space_usage
INNER join
  sys.dm_exec_sessions
ON  sys.dm_db_session_space_usage.session_id = sys.dm_exec_sessions.session_id

我个人更喜欢使用扩展事件来跟踪此事.Below是跟踪使用扩展事件的方式。您可以在brentozar上看到完整的演示

CREATE EVENT SESSION [PublicToilet] ON SERVER
ADD EVENT [sqlserver].[database_file_size_change] (
    ACTION ( [sqlserver].[session_id], [sqlserver].[database_id],
    [sqlserver].[client_hostname], [sqlserver].[sql_text] )
    WHERE ( [database_id] = ( 2 )
            AND [session_id] > ( 50 ) ) ),
ADD EVENT [sqlserver].[databases_log_file_used_size_changed] (
    ACTION ( [sqlserver].[session_id], [sqlserver].[database_id],
    [sqlserver].[client_hostname], [sqlserver].[sql_text] )
    WHERE ( [database_id] = ( 2 )
            AND [session_id] > ( 50 ) ) )
ADD TARGET [package0].[asynchronous_file_target] (  SET filename = N'c:\temp\publictoilet.xel' ,
                                                    metadatafile = N'c:\temp\publictoilet.xem' ,
                                                    max_file_size = ( 10 ) ,
                                                    max_rollover_files = 10 )
WITH (  MAX_MEMORY = 4096 KB ,
        EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS ,
        MAX_DISPATCH_LATENCY = 1 SECONDS ,
        MAX_EVENT_SIZE = 0 KB ,
        MEMORY_PARTITION_MODE = NONE ,
        TRACK_CAUSALITY = ON ,
        STARTUP_STATE = ON );
GO

您可能还想查看此链接..

https://technet.microsoft.com/en-us/library/ms176029(v=sql.105).aspx

参考文献：
https://dba.stackexchange.com/questions/13911/how-to-find-the-sql-statements-that-caused-tempdb-growth

Answer 2

我正在使用Query Store

将度量标准选择为“已使用的临时数据库内存（KB）”，将统计信息选择为“最大”。然后我找到了杀死TempDB的查询。

希望获得帮助

识别导致空间问题的查询

2 个答案: