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Greg Smith wrote:
> On Thu, 2 Aug 2007, Tom Lane wrote:
>
> > I find it entirely likely that simply changing the [NUM_CLOG_BUFFERS]
> > constant would be a net loss on many workloads.
>
> Would it be reasonable to consider changing it to a compile-time option
> before the 8.3 beta? From how you describe the potential downsides, it
> sounds to me like something that specific distributors might want to
> adjust based on their target customer workloads and server scale. That
> would make it available as a tunable to those aiming at larger systems
> with enough CPU/memory throughput that the additional overhead of more
> linear searches is trumped by the reduced potential for locking
> contention, as appears to be the case in Sun's situation here.
>
> --
> * Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD
>
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-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://www.enterprisedb.com
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