SQL 性能分析

SELECT s2.dbid,
s1.sql_handle,
(SELECT TOP  SUBSTRING(s2.text,statement_start_offset / + ,
( (CASE WHEN statement_end_offset = -
THEN (LEN(CONVERT(nvarchar(max),s2.text)) * )
ELSE statement_end_offset END) - statement_start_offset) / +)) AS sql_statement,
execution_count,
plan_generation_num,
last_execution_time,
total_worker_time,
last_worker_time,
min_worker_time,
max_worker_time,
total_physical_reads,
last_physical_reads,
min_physical_reads,
max_physical_reads,
total_logical_writes,
last_logical_writes,
min_logical_writes,
max_logical_writes
FROM sys.dm_exec_query_stats AS s1
CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2
WHERE s2.objectid is null
ORDER BY last_worker_time desc,s1.sql_handle, s1.statement_start_offset, s1.statement_end_offset;