Problem with Parallel Query Execution

I have a SQL 7 db with a union query (view), and I'm getting the error, "The
query processor could not start the necessary thread resources for parallel
query execution." This union query has been in place for about two years now
with no problems until just now, though I haven't changed anything. Also, I
have a local copy of the database on my machine, and the query runs fine.
As noted, I haven't changed anything in the query, nor in the SQL settings.
There is a network administrator, so it's possible that he may have changed
a setting, but I don't know what. The query is reproduced below. Any ideas
as to what's going on would be appreciated.
Neil
Main query:
SELECT Tmp.INVCUST, Tmp.SDNBR, Tmp.SDBOOK, Tmp.SDIVCLN,
Tmp.SDPAID, Tmp.SDPRICE, Tmp.SDCOPIES, Tmp.Location,
INVTRY.AUTHILL1, Tmp.INVDATE, INVTRY.SaleSrc,
INVTRY.HoldInit
FROM (SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
SDPAID, SDPRICE, SDCOPIES, 'P' AS Location
FROM vwInvoiceDet
UNION ALL
SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
SDPAID, SDPRICE, SDCOPIES, 'N' AS Location
FROM vwInvoiceDetN
UNION ALL
SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
SDPAID, SDPRICE, SDCOPIES, 'M' AS Location
FROM vwInvoiceDetM) Tmp INNER JOIN
dbo.INVTRY ON Tmp.SDBOOK = dbo.INVTRY.[Index]
vwInvoiceDet:
SELECT tabInvoice.INVDATE, tabInvoice.INVCUST,
SALEDET.SDNBR, SALEDET.SDBOOK, SALEDET.SDINVNUM,
SALEDET.SDPRICE, SALEDET.SDPAID, SALEDET.SDCOPIES,
SALEDET.SDIVCLN, tabInvoice.INVNBR, SALEDET.SDID
FROM dbo.tabInvoice INNER JOIN
dbo.SALEDET ON
dbo.tabInvoice.INVNBR = dbo.SALEDET.SDNBR
(vwInvoiceDetN and vwInvoiceDetM are similar to vwInvoiceDet.)SQL makes a parallel query plan at optimization time. When you tried to run
the query, maybe not all of the processors were available OR there were not
enough threads available ... Perhaps setting MAXDOP to 2 or 3 might help..
This can be done on Enterprise manager, right click your server and go to
the Properties item.. (MAX Degree of Parallelism.)
HTH,
Vinod Kumar
MCSE, DBA, MCAD, MCSD
http://www.extremeexperts.com
Books Online for SQL Server SP3 at
http://www.microsoft.com/sql/techin.../2000/books.asp
"Neil Ginsberg" <nrg@.nrgconsult.com> wrote in message
news:0DXNd.2806$UX3.1660@.newsread3.news.pas.earthlink.net...
> I have a SQL 7 db with a union query (view), and I'm getting the error,
"The
> query processor could not start the necessary thread resources for
parallel
> query execution." This union query has been in place for about two years
now
> with no problems until just now, though I haven't changed anything. Also,
I
> have a local copy of the database on my machine, and the query runs fine.
> As noted, I haven't changed anything in the query, nor in the SQL
settings.
> There is a network administrator, so it's possible that he may have
changed
> a setting, but I don't know what. The query is reproduced below. Any ideas
> as to what's going on would be appreciated.
> Neil
> Main query:
> SELECT Tmp.INVCUST, Tmp.SDNBR, Tmp.SDBOOK, Tmp.SDIVCLN,
> Tmp.SDPAID, Tmp.SDPRICE, Tmp.SDCOPIES, Tmp.Location,
> INVTRY.AUTHILL1, Tmp.INVDATE, INVTRY.SaleSrc,
> INVTRY.HoldInit
> FROM (SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
> SDPAID, SDPRICE, SDCOPIES, 'P' AS Location
> FROM vwInvoiceDet
> UNION ALL
> SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
> SDPAID, SDPRICE, SDCOPIES, 'N' AS Location
> FROM vwInvoiceDetN
> UNION ALL
> SELECT INVDATE, INVCUST, SDNBR, SDBOOK, SDIVCLN,
> SDPAID, SDPRICE, SDCOPIES, 'M' AS Location
> FROM vwInvoiceDetM) Tmp INNER JOIN
> dbo.INVTRY ON Tmp.SDBOOK = dbo.INVTRY.[Index]
> vwInvoiceDet:
> SELECT tabInvoice.INVDATE, tabInvoice.INVCUST,
> SALEDET.SDNBR, SALEDET.SDBOOK, SALEDET.SDINVNUM,
> SALEDET.SDPRICE, SALEDET.SDPAID, SALEDET.SDCOPIES,
> SALEDET.SDIVCLN, tabInvoice.INVNBR, SALEDET.SDID
> FROM dbo.tabInvoice INNER JOIN
> dbo.SALEDET ON
> dbo.tabInvoice.INVNBR = dbo.SALEDET.SDNBR
> (vwInvoiceDetN and vwInvoiceDetM are similar to vwInvoiceDet.)
>|||I tried it just now, after hours, with no one on the system, and the results
were the same.
In any case, I think I resolved it. I stopped the SQL Server and then
restarted it, and the problem cleared up. So I don't know what was going on,
but stopping and restarting definitely cleared up whatever it was.
Thanks,
Neil
"Vinod Kumar" <vinodk_sct@.NO_SPAM_hotmail.com> wrote in message
news:cu9h7q$lkv$1@.news01.intel.com...
> SQL makes a parallel query plan at optimization time. When you tried to
> run
> the query, maybe not all of the processors were available OR there were
> not
> enough threads available ... Perhaps setting MAXDOP to 2 or 3 might help..
> This can be done on Enterprise manager, right click your server and go to
> the Properties item.. (MAX Degree of Parallelism.)
> --
> HTH,
> Vinod Kumar
> MCSE, DBA, MCAD, MCSD
> http://www.extremeexperts.com
> Books Online for SQL Server SP3 at
> http://www.microsoft.com/sql/techin.../2000/books.asp
> "Neil Ginsberg" <nrg@.nrgconsult.com> wrote in message
> news:0DXNd.2806$UX3.1660@.newsread3.news.pas.earthlink.net...
> "The
> parallel
> now
> I
> settings.
> changed
>