Question

I have a several very expensive queries which seem to hog resources that seems to put the system over the top.

Is there a delay function I can call to wait until processor resources come back down in SQL Server 2000 – 2008?

My eventual goal is to go back and make these more efficient, use a sproc, but in the meantime I need to get these to work asap because I’m rewriting legacy code.

Answer 1

you could try something like this:

DECLARE @Busy int
       ,@Ticks int
SELECT @Busy=@@CPU_BUSY
      ,@Ticks=7777  --<you have to determine this value based on your machine
WAITFOR DELAY '00:00:10' --10 seconds

WHILE @@CPU_BUSY-@Ticks>@BUSY
BEGIN
    --too busy, wait longer
    @BUSY=@@CPU_BUSY
    WAITFOR DELAY '00:00:10' --10 seconds
END

EXEC YourProcedureHere

to determine the @Ticks value, just write a loop to print out the difference between @@CPU_BUSY values every 10 seconds. When the system is at your low load, use this value as @Ticks.