清除数据和执行计划缓存：
DBCC DROPCLEANBUFFERS
DBCC FREEPROCCACHE
打开统计数据：
SET STATISTICS IO ON
SET STATISTICS TIME ON
打开执行计划：
SET
SHOWPLAN_TEXT ON
SET
SHOWPLAN_ALL ON
SET
STATISTICS PROFILE ON
SET
SHOWPLAN_XML ON
SET
STATISTICS PROFILE XML
|
各选项的区别 |
||||
|
|
Command |
Execute Query? |
Include Estimated Row Counts & Stats |
Include Actual Row Counts & Stats |
|
Text Plan |
SET SHOWPLAN_TEXT ON |
No |
No |
No |
|
SET SHOWPLAN_ALL ON |
No |
Yes |
No |
|
|
SET STATISTICS PROFILE ON |
Yes |
Yes |
Yes |
|
|
XML Plan |
SET SHOWPLAN_XML ON |
No |
Yes |
No |
|
SET STATISTICS PROFILE XML |
Yes |
Yes |
Yes |
|