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Posted by quincy451 on 01/26/08 04:38
On Jan 25, 9:25 pm, Tom van Stiphout <no.spam.tom7...@cox.net> wrote:
> On Fri, 25 Jan 2008 15:02:52 -0800 (PST), quincy...@yahoo.com wrote:
>
> I take it the code on the remote server is something like this:
> truncate table SomeTable
> for i=1 to 10000
> Insert One Row
> next i
Yes.
>
> Inserting a record will put an Exclusive lock on the table. From BOL:
> Exclusive (X) Used for data-modification operations, such as INSERT,
> UPDATE, or DELETE. Ensures that multiple updates cannot be made to the
> same resource at the same time.
So you are telling me INSERT in a loop like that will lock and unlock
the table
repeatedly, but possibly because of the tightness of the loop never
let me in
to get my stuff done. And are you saying UPDATE, and DELETE work the
same
way? Now for the dumb question: What is BOL: Exclusive (X)? I guess
it
remains a open question what might make the remote side take 6 minutes
to
complete these insert operations. But knowing what will lock the
other side
out is very important.
>
> If you don't have control over the remote server process, you will
> have to live with it. If you do have control, you could investigate
> more efficient data import strategy (perhaps BCP) as well as more
> acceptable timing (2AM).
Well, the other side is under my influence. I am the developer of the
local
application. The other side is someone else's code for which they
have
full control. I can advise and point in a different direction, if I
have that direction,
and most likely get things done. We are currently doing the late
night trick But
not always...
>
> -Tom.
>
>
>
> >I am running MS SQL 2000 server. The table involved is only about
> >10,000 records. But this is the behavior I am seeing.
>
> >The local machine is querying the table looking for a particular
> >record. Everything works fine.
> >The remote amchine goes to clear the table and then insert all 10,000
> >records, into the table the following happens.
>
> >1) the local machines queries do not compilete until the remote
> >machine is done.
> >2) the remote machine can take up to 6 minutes to do these 10,000
> >insert operations. So nothing on the local machine works right for
> >these 6 minutes.
>
> >I do not have access to the remote machines source to see what is
> >running but I am told it is simply a for loop with a insert query in
> >it. Nothing of a locking natture.
>
> >Any idea the types of things I should look for to track this down? I
> >found this by doing SQL profiler profiling and finding the remote
> >operations. Turn these operatiiosn off and the local machine works
> >fine again, with no other action.
>
> >Thanks,
> >David- Hide quoted text -
>
> - Show quoted text -
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