A Stored Procedure runs slow while it's SQL is fast. RECOMPILE won't help

Hi all
I have a SP that beahves strange. Originally it takes about 20 milliseconds
to complete, but sometimes it starts going slow and take about 5-7 seconds.
When this happens, it keeps going slow.
I tried to run the SQL body of the SP in the Query analyzer, and it runs
fast (20 ms), while the SP takes 5-7 seconds
I've tried recompiling the procedure, as well as drop and create it again,
but it doesn't help.
Does anyone knows what can cause this and what is the soloution ?
TIA
Boaz Ben-Porat
Milestone SystemsFirst thing: Google for "Parameter sniffing", make sure you understand that
concept.
Tibor Karaszi, SQL Server MVP
http://www.karaszi.com/sqlserver/default.asp
http://www.solidqualitylearning.com/
"Boaz Ben-Porat" <bbp@.milestone.dk> wrote in message news:OerL4M8ZGHA.3880@.TK2MSFTNGP04.phx
.gbl...
> Hi all
> I have a SP that beahves strange. Originally it takes about 20 millisecond
s
> to complete, but sometimes it starts going slow and take about 5-7 seconds
.
> When this happens, it keeps going slow.
> I tried to run the SQL body of the SP in the Query analyzer, and it runs
> fast (20 ms), while the SP takes 5-7 seconds
> I've tried recompiling the procedure, as well as drop and create it again,
> but it doesn't help.
> Does anyone knows what can cause this and what is the soloution ?
> TIA
> Boaz Ben-Porat
> Milestone Systems
>
>|||Could be parameter sniffing, can you show the code?
Denis the SQL Menace
http://sqlservercode.blogspot.com/|||Hi Denis
Disabling parameter sniffing seems to work here. If it is still too slow
I'll send the code (which a bit messy). If not, I wouldn't waist your time.
Thanks
Boaz Be-Porat
"SQL" <denis.gobo@.gmail.com> wrote in message
news:1145899699.966141.109220@.y43g2000cwc.googlegroups.com...
> Could be parameter sniffing, can you show the code?
> Denis the SQL Menace
> http://sqlservercode.blogspot.com/
>