Re: Has anyone done any scalability work on dbms_lock?

> As in: does it present an inherent or hidden performance
> problem when a lot of sessions try to lock/release the same
> lock?

Will serialize perfectly!

> Or how many lock/release per second. Or some other
> idea of how efficient it is?

Depends on the work done between acquiring the lock and releasing it.

>
> Need to use it in a design, but not sure of any potential
> performance hits or scalability issues. Any ideas?
When sessions acquire the same lock (as asked), only one session can do the work in a given moment. So, it doesn't scale. There will be overhead, but that also is relative to the duration of the work done while the lock is held.

Maybe AQ can help, by doing the work asynchronously in the background and so lift the serialization from the primary proces(ses)?

Regards, Carel-Jan

===
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>
> TIA.
> Cheers
> Nuno Souto
> nsouto_at_optusnet.com.au
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