On 02/22/2015 11:48 AM, Kevin Grittner wrote:
>
> (2) Use a course enough granularity on time and a short enough
> maximum for the GUC to just keep a circular buffer of the mappings
> in memory. We might be able to make this dense enough that one
> minute resolution for up to 60 days could fit in 338kB. Obviously
> that could be reduced with courser granularity or a shorter
> maximum.
>
This doesn't sound too bad to me. Presumably these would be tunable. I
think one minute granularity would be fine for most purposes, but I can
imagine people who would want it finer, like 10 seconds, say.
cheers
andrew