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1answer
32 views

why a session becomes a head blocker

I am troubleshooting a problem that seems to be random The problem is sometimes an application (dynamics SL) is freezing When the application is freezing , I notice there is a blocked by in SQL ...
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1answer
60 views

Alter table add column query blocking a table or taking so much time

I'm trying to add a new column to an existing table but it takes so much time or the query is blocking the table, i'm really confused about what's happen exactly. ALTER TABLE MYTABLE1 ADD MYEXPORT9 ...
3
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1answer
71 views

How can a blocking_session_id be negative?

I have a case where a query I'm running is taking a long time. When I checked sys.dm_exec_requests the blocking_session_id is a negative value, -2 to be specific. The wait is a LCK_M_X and the ...
2
votes
1answer
53 views

Why am I getting blocked when I call OBJECT_NAME(object_id, database_id) from sys.dm_tran_locks?

I'm working on a query to tell what objects have locks from a given session and I'm running into some blocking issues. Here is my basic query: SELECT request_session_id AS session_id, ...
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0answers
138 views

Excessive compile blocking on sp_procedure_params_90_rowset

A resurgence of this question Blocked-process-report: what is this waitresource "OBJECT: 32767:124607697:0 [COMPILE] on MSDN: I have caught these statements in Profiler. They all have durations over ...