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Posted by John Bell on 10/03/40 11:29
Hi
Could anyone (or a job) be affecting the backend?
John
"Neil" <nospam@nospam.net> wrote in message
news:WAx4f.4073$hY6.455@newsread1.news.pas.earthlink.net...
>I have a very puzzling situation with a database. It's an Access 2000 mdb
>with a SQL 7 back end, with forms bound using ODBC linked tables. At our
>remote location (accessed via a T1 line) the time it took to go to a record
>was very slow. The go to mechanism was a box that the user typed the index
>value into a combo box, with very simple code attached:
>
> with me.RecordsetClone
> .FindFirst "[Index] = " & me.cboGoTo
> If Not .NoMatch Then
> Me.Bookmark = .Bookmark
> End If
> end with
>
> Now, one would say that going to a record is slow because I'm using
> .FindFirst over a T1 line. And that's what I thought. However, as I was
> working with the form, commenting out various sections not related to the
> Go To, I found that the Go To functionality changed, though I didn't
> modify the code.
>
> Previously, going to a record near the end of the 50,000 record recordset
> took about 1-2 seconds, but going to a record near the beginning, took
> about 20 seconds. After the form changed, going to any record in the
> recordset took about 1-2 seconds.
>
> So the question remains: why did it take so long to go to a record near
> the beginning of the recordset, but not near the end (and the ones in the
> middle took an amount of time about halfway between the two), and what
> changed so that now the form is working fine for all records?
>
> I've compared the changed form with the previous copy, and I don't see any
> differences. I've compared all code in the form module, and I've compared
> all form properties. The forms are identical as far as I could tell. But
> something happened as I was commenting/uncommenting code in the form that
> got rid of the problem with it taking a long time to go to some of the
> records.
>
> My first thought was that something got recompiled, and now the form is
> fast. So I went back to the original version and changed some code and
> recompiled, also did a compact and repair. But it was still slow. I also
> tried doing an explicit decompile and then recompiled it. But it was still
> slow.
>
> So this is very frustrating that the form is now working fine, but I can't
> see anything that's changed. If I don't see why the form is now fast, then
> there's no reason to believe that it might not at some point go back to
> being slow again. And then I'd just have to hope that something changes.
> It would be good to figure this out.
>
> Any ideas as to what might have changed here to cause the form's Go To to
> be fast would be appreciated.
>
> Thanks,
>
> Neil
>
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