On 2/9/2010 4:41 PM, Asher Hoskins wrote:
>
> Thanks for that, it looks like partitioning is the way to go. I'm
> assuming that I should try and keep my total_relation_sizes less than
> the memory size of the machine?
This depends on what the quires look like. As other have stated when
partitioning you have to consider how the data is quired.
>
>
> If I partition so that each partition holds data for a single channel
> (and set a CHECK constraint for this) then I can presumably remove the
> channel from the index since constraint exclusion will mean that only
> partitions holding the channel I'm interested in will be searched in a
> query. Given that within a partition all of my sample_time's will be
> different do you know if there's a more efficient way to index these?
Given the timestamp will most likely be the where clause, NO on the
plus side its only 8 bytes
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