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XEvent – SQL Server Log文件对磁盘的写操作大小是多少
原文:XEvent – SQL Server Log文件对磁盘的写操作大小是多少
本篇是上一篇SQL Server Log文件对磁盘的写操作大小是多少的续,使用XEvent收集SQL Server Data文件和Log文件的写大小,脚本如下:
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | DECLARE @DBNAME VARCHAR (256) SET @DBNAME = ‘myDB‘ DECLARE @sqlcmd NVARCHAR( MAX ) = ‘IF EXISTS(SELECT * FROM sys.server_event_sessions WHERE name=‘ ‘filewritecompleted‘ ‘) DROP EVENT SESSION [filewritecompleted] ON SERVER; CREATE EVENT SESSION [filewritecompleted] ON SERVER ADD EVENT sqlserver.file_write_completed (WHERE (database_id = ‘ + CAST (DB_ID( ‘‘ +@DBNAME+ ‘‘ ) AS VARCHAR (3)) + ‘)) ADD TARGET package0.asynchronous_file_target( SET filename=‘ ‘D:\XEvent\filewritecompleted.xel‘ ‘, metadatafile=‘ ‘D:\XEvent\filewritecompleted.xem‘ ‘) WITH (MAX_MEMORY = 8192KB, EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS, STARTUP_STATE = ON)‘ EXEC (@sqlcmd) GO ALTER EVENT SESSION filewritecompleted ON SERVER STATE=START GO WAITFOR DELAY ‘00:05:00‘ ALTER EVENT SESSION filewritecompleted ON SERVER STATE=STOP GO USE tempdb GO SELECT CAST (event_data AS XML) AS event_data INTO TargetEvents FROM sys.fn_xe_file_target_read_file( ‘D:\XEvent\filewritecompleted*.xel‘ , ‘D:\XEvent\filewritecompleted*.xem‘ , NULL , NULL ) SELECT event_data.value( ‘(event/@name)[1]‘ , ‘varchar(50)‘ ) AS event_name , DATEADD(hh, DATEDIFF(hh, GETUTCDATE(), CURRENT_TIMESTAMP ), event_data.value( ‘(event/@timestamp)[1]‘ , ‘datetime2‘ )) AS [ timestamp ] , COALESCE (event_data.value( ‘(event/data[@name="database_id"]/value)[1]‘ , ‘int‘ ), event_data.value( ‘(event/action[@name="database_id"]/value)[1]‘ , ‘int‘ )) AS database_id , event_data.value( ‘(event/data[@name="mode"]/text)[1]‘ , ‘nvarchar(4000)‘ ) AS [mode] , event_data.value( ‘(event/data[@name="file_handle"]/value)[1]‘ , ‘nvarchar(4000)‘ ) AS [file_handle] , event_data.value( ‘(event/data[@name="offset"]/value)[1]‘ , ‘bigint‘ ) AS [offset] , event_data.value( ‘(event/data[@name="file_id"]/value)[1]‘ , ‘int‘ ) AS [file_id] , event_data.value( ‘(event/data[@name="filegroup_id"]/value)[1]‘ , ‘int‘ ) AS [filegroup_id] , event_data.value( ‘(event/data[@name="size"]/value)[1]‘ , ‘bigint‘ ) AS [ size ] INTO Results FROM TargetEvents select * from Results --Log File Write Size SELECT size , COUNT (*) AS cnt , LTRIM( CAST ( COUNT (*) * 1.0 / ( SELECT COUNT (*) FROM Results WHERE file_id = 2 ) * 100 AS NUMERIC (18, 4))) + ‘%‘ AS ratio FROM Results WHERE file_id = 2 GROUP BY size ORDER BY CAST ( COUNT (*) * 1.0 / ( SELECT COUNT (*) FROM Results WHERE file_id = 2 ) * 100 AS NUMERIC (18, 4)) desc --Data File Write Size SELECT size , COUNT (*) AS cnt , LTRIM( CAST ( COUNT (*) * 1.0 / ( SELECT COUNT (*) FROM Results WHERE file_id != 2 ) * 100 AS NUMERIC (18, 4))) + ‘%‘ AS ratio FROM Results WHERE file_id != 2 GROUP BY size ORDER BY CAST ( COUNT (*) * 1.0 / ( SELECT COUNT (*) FROM Results WHERE file_id = 2 ) * 100 AS NUMERIC (18, 4)) desc --DROP TABLE tempdb.dbo.TargetEvents, tempdb.dbo.Results |
在一个OLTP结果如下:
Log File Write Size:
Data File Write Size :
用XEvent收集,的确要比之前的方法简单很多,此方法感谢一位Cookies_Tang网友提醒。
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