清除SQL Server資料快取和執行計劃快取,檢視執行計劃的各種方式對比
阿新 • • 發佈：2019-02-04
清除資料和執行計劃快取：
DBCC DROPCLEANBUFFERS
DBCC FREEPROCCACHE
開啟統計資料：
SET STATISTICS IO ON
SET STATISTICS TIME ON
開啟執行計劃：
SET SHOWPLAN_TEXT ON
SET SHOWPLAN_ALL ON
SET STATISTICS PROFILE ON
SET SHOWPLAN_XML ON
SET STATISTICS PROFILE XML
|
各選項的區別 | ||||
|
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 | |