On Wed, Oct 17, 2012 at 1:36 PM, Rick Debay <rde...@accessrxs.com> wrote:
> So to summarize, the only two things key ordering affects (excluding the > ability to use partial key matches): > > Less unique keys first reduce index size. > Right. > More unique keys first improve garbage collection in pre 2.0 servers. > Obviously I wasn't clear. If you have a compound key, the selectivity of the whole key makes a difference in garbage collection, so it doesn't make any different whether the more selective or less selective is first. One of the hacks to make a non-selective index behave better in pre-2.0 indexes is to append the primary key. Good luck, Ann [Non-text portions of this message have been removed]
