Identifying Queries with Lowest Plan Reuse

Lowest Plan Reuse

One of the advantages of using stored procedures is that the query plan is cached and can be reused without compiling the query. This saves time, resources, and improves performance. You can identify the query plans that have the lowest reuse to further investigate why the plans are not being reused. You may find that some can be rewritten to optimize reuse.

SELECT TOP 10


[Plan usage] = cp.usecounts

,[Individual Query] = SUBSTRING (qt.text,qs.statement_start_offset/2,

(CASE WHEN qs.statement_end_offset = -1

THEN LEN(CONVERT(NVARCHAR(MAX),

qt.text)) * 2 ELSE qs.statement_end_offset END -

qs.statement_start_offset)/2)

,[Parent Query] = qt.text

,DatabaseName = DB_NAME(qt.dbid)

,cp.cacheobjtype

FROM sys.dm_exec_query_stats qs

CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS qt

INNER JOIN sys.dm_exec_cached_plans as cp on qs.plan_handle=cp.plan_handle

WHERE cp.plan_handle=qs.plan_handle

ORDER BY [Plan usage] ASC;