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RE: Has anyone done any scalability work on dbms_lock?

From: Jamadagni, Rajendra <>
Date: Wed, 21 Jan 2004 06:24:37 -0800
Message-ID: <>

if it is single instance you could also use global application contexts ... (alas they don't work in RAC across node) ...


Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art !

-----Original Message-----
Sent: Wednesday, January 21, 2004 9:10 AM To: Multiple recipients of list ORACLE-L

> On a light-weight test on at 700MHz on W2000 -
> About 15,000 request/release per second
> if you are using an ID

sounds plenty good to me. Thanks a lot.

> Bear in mind that each request or release will hit the
> enqueue latch a couple of times, so you could get
> contention for the latch in the two high-speed options.

OK. Will look out for these just in case.

> Bottom line - for high-speed OLTP type of work, I
> don't think you will get away with more than a dozen
> request/release cycles per transaction.

Not a worry, it's a workflow app. A few users but not much load, a little volume. I just need to make sure a given sequence of operations is not undertaken by more than one user per group (one lock/group) and a table lock is way too heavy to do this. Forms 9i, so it's not easy to fudge it with a C exit and I don't like servlets. Much better if I can do the lot in PL/SQL.

Thanks again.
Nuno Souto

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Received on Wed Jan 21 2004 - 08:24:37 CST

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