I just did a count(*) from one of our biggest tables. It took 2 min to
load it into memory the first time.
SELECT count(*) cnt
FROM [erplndb].[dbo].[glTable600]
cnt
138,371,855
The second time I run this it only takes .03 seconds. The size of the
table and index is a mere 364 gigs today.
On Fri, Oct 23, 2020 at 2:24 PM MB Software Solutions, LLC <
mbsoftwaresoluti...@mbsoftwaresolutions.com> wrote:
> The WHERE clause was something to count but I don't think it was
> optimizable because no index based on it. (Vague recollection; not 100%
> sure.)
>
> SET MULTILOCKS is ON.
>
>
> On 10/22/2020 3:36 PM, Richard Kaye wrote:
> > True. My next guess is it's using the index because your WHERE clause
> is Rushmore optimized. So it still doesn't need to move the record pointer
> in the source table. And I'll return to how your environment is setup. I'd
> have to go read the fine docs to understand why moving the record pointer
> is also trying to lock the row. Do you have SET MULTILOCKS ON?
> >
> > --
> >
> > rk
> >
> > -----Original Message-----
> > From: ProfoxTech <profoxtech-boun...@leafe.com> On Behalf Of Richard
> Kaye
> > Sent: Thursday, October 22, 2020 3:28 PM
> > To: profoxt...@leafe.com
> > Subject: RE: COUNT FOR hangs on record locking, but SQL - SELECT
> COUNT(*) works with no issue. Why?
> >
> > Leaving aside the environment stuff like SET EXCLUSIVE and SET
> MULTILOCKS, my first guess is COUNT FOR actually moves the record pointer
> through every row in the table, Whereas SELECT COUNT() is reading the
> header.
> >
> > --
> >
> > rk
> >
> > -----Original Message-----
> > From: ProfoxTech <profoxtech-boun...@leafe.com> On Behalf Of MB
> Software Solutions, LLC
> > Sent: Thursday, October 22, 2020 3:24 PM
> > To: profoxt...@leafe.com
> > Subject: COUNT FOR hangs on record locking, but SQL - SELECT COUNT(*)
> works with no issue. Why?
> >
> > VFP9SP3
> >
> > Why would a COUNT FOR hang ("Attempting to lock") whereas my easy
> workaround is SELECT COUNT(*) FROM SomeCursor WHERE <<yada yada yada>> ??
> >
> > tia,
> > --Mike
> >
> >
[excessive quoting removed by server]
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