Re: limit number of concurrent callers to a stored proc?

You could use a 1 column/1 row table perhaps.  Use some sort of locking
mechanism.

Also, check out contrib/userlock

Chris

Alan Stange wrote:
> Hello all,
>
> is there a simple way to limit the number of concurrent callers to a
> stored proc?
>
> The problem we have is about 50 clients come and perform the same
> operation at nearly the same time.  Typically, this query takes a few
> seconds to run, but in the case of this thundering herd the query time
> drops to 70 seconds or much more.  The query can return up to 15MB of data.
>
> The machine is a dual opteron, 8 GB memory, lots of fiber channel disk,
> Linux 2.6, etc.
>
> So, I'm thinking that a semaphore than will block more than N clients
> from being in the core of the function at one time would be a good thing.
> Thanks!
>
> -- Alan
>
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