SQL Server LCK_M_S only happens in production -

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i have stored procedure called sql server 2012 report taking age run in production compared development because of blocking session lck_m_s

the stored procedure runs instantaneously when executed in sql server management studio , works when called part of report dev laptop via visual studio.

when report uploaded production server blocking issue appears.

how can find out causing lck_m_s issue when in production?

execute query when problem happens again:

select *  sys.dm_os_waiting_tasks t inner join sys.dm_exec_connections c on c.session_id = t.blocking_session_id cross apply sys.dm_exec_sql_text(c.most_recent_sql_handle) h1

it give spid of session caused blocking, on resource blocked, , text of rcent query session. should give solid starting point.


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