Query works then later timeouts

We have a query which joins 3 tables where all 3 of the tables have less tha
n 300 rows each.
The query is fine when there is less than 50 users but when it gets over 50
it runs until it timeouts. During this time while it is running and not ret
urning I can do selects on each individual table but if I run the query with
the joins it never returnsWhat is the waittype for that spid during the slow times?
Andrew J. Kelly
SQL Server MVP
"Darin Browne" <anonymous@.discussions.microsoft.com> wrote in message
news:00EDE2AB-4CE0-4014-A0F6-18552B409DB1@.microsoft.com...
> We have a query which joins 3 tables where all 3 of the tables have less
than 300 rows each.
> The query is fine when there is less than 50 users but when it gets over
50 it runs until it timeouts. During this time while it is running and not
returning I can do selects on each individual table but if I run the query
with the joins it never returns.
> We've checked locks, if anything is blocking it, indexes used and
everything is fine during the never ending select.
> Any suggestions on what we could do? We're stumped.
> Thanks.
>