--
top 10 引发i/o
SELECT (total_logical_reads / execution_count) AS avg_logical_reads
,(total_logical_writes / execution_count) AS avg_logical_writes
,(total_physical_reads / execution_count) AS avg_physical_reads
,execution_count
,( SELECT SUBSTRING ( text ,statement_start_offset / 2 + 1 ,
( CASE WHEN statement_end_offset = - 1
THEN LEN ( CONVERT ( NVARCHAR ( max ), text )) * 2
ELSE statement_end_offset
END - statement_start_offset) / 2 )
FROM sys.dm_exec_sql_text(sql_handle)) AS query_text
FROM sys.dm_exec_query_stats
ORDER BY (total_logical_reads + total_logical_writes)
SELECT (total_logical_reads / execution_count) AS avg_logical_reads
,(total_logical_writes / execution_count) AS avg_logical_writes
,(total_physical_reads / execution_count) AS avg_physical_reads
,execution_count
,( SELECT SUBSTRING ( text ,statement_start_offset / 2 + 1 ,
( CASE WHEN statement_end_offset = - 1
THEN LEN ( CONVERT ( NVARCHAR ( max ), text )) * 2
ELSE statement_end_offset
END - statement_start_offset) / 2 )
FROM sys.dm_exec_sql_text(sql_handle)) AS query_text
FROM sys.dm_exec_query_stats
ORDER BY (total_logical_reads + total_logical_writes)
