On Sat, Nov 22, 2008 at 5:54 PM, Scara Maccai <m_lists@yahoo.it> wrote:
> Since you always need the timestamp in your selects, have you tried indexing only the timestamp field?
> Your selects would be slower, but since client and sensor don't have that many distinct values compared to the number
ofrows you are inserting maybe the difference in selects would not be that huge.
Even better might be partitioning on the timestamp. IF all access is
in a certain timestamp range it's usually a big win, especially
because he can move to a new table every hour / day / week or whatever
and merge the old one into a big "old data" table.