sql server - MS SQL Timeout on ASP.NET Page but not in SSMS -

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when sproc executed on 1 of our asp.net pages, times out on sql server exception timeout expired. timeout period elapsed prior completion of operation or server not responding.. when execute same sproc in ssms, returns relatively quickly. sql server , iis on same box. logged in same user in both places. other pages fine.

probably parameter sniffing.

my answer here gives queries can use retrieve both execution plans (the ssms 1 , asp.net one) compare , contrast.

edit

this might more useful query actually.

use yourdatabase;  select * sys.dm_exec_cached_plans  cross apply sys.dm_exec_sql_text(plan_handle)  cross apply sys.dm_exec_query_plan(plan_handle)  cross apply sys.dm_exec_plan_attributes(plan_handle) epa sys.dm_exec_sql_text.objectid=object_id('yourprocname')           , attribute='set_options'

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