Jeffrey,
> I agree that some instrumentation of the backend might be needed. But
> several of the performance-critical parameters seem tractable:
>
> Effective cache size - should be easy to monitor the system for this
> Shared buffers - easy to start from a rule-of-thumb and monitor usage
> Work mem - trace the size and frequency of temp files
> Wal buffers - trace the average or 80th percentile number of pages
> generated by transactions
> Commit delay - track the concurrency level and avg distance btw commits
> Checkpoint segments - should be very easy to auto-adjust
> Random page cost - should possible to determine this at runtime
> Vacuum* - may be possible to determine vacuum impact on concurrent
> queries
Great. Wanna join the configurator project? I won't have much time to
work on it before March, but anyone with ideas is welcome.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco
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