Neil Conway wrote:
> Bruce Momjian wrote:
> > My guess is the existing behavior was designed to allow waking of
> > multiple waiters _sometimes_ without starving of exclusive waiters.
>
> Well, I think the current algorithm *does* allow starvation, at least in
> some situations. Consider a workload in which a new shared reader
> arrives every 50 ms, and holds the lock for, say, 500 ms. If an
> exclusive waiter arrives, they will starve with the current algorithm.
I thought the new readers will sit after the writer in the FIFO queue so
the writer will not starve.
-- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610)
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