Thanks for the feedback Steve, In ref to auto inc, actually, I have! :) In the code on the blog, it shows that the tables uses a BIGINT auto increment for each row, and the performance was still good. However, using this approach introduces an unnecessary JOIN and uses more index and table space - unless I've missed something? Could you elaborate more on the UUIDs that may not be 128-bit? My google-fu failed me :/ Cal On Sun, Feb 17, 2013 at 9:11 PM, Steven Ayre <steveayre@gmail.com> wrote:
Another possibility you haven't looked at is having a table of UUIDs with a BIGINT auto_increment PK and using that as keys in other takes with a foreign key relationship (whether defined or implied). That would give you a smaller integer (hence faster select/insert/join/etc) that's still guaranteed to be unique. Though the auto_increment INSERT could then become a bottleneck (hint run a recent 5.5/5.6 MySQL version at the very least since that bottleneck while still present was very much reduced).
-Steve
On 17 February 2013 20:55, Cal Leeming [Simplicity Media Ltd] < cal.leeming@simplicitymedialtd.co.uk> wrote:
Hi all,
Just spent a little while comparing the performance of heavy INSERT/SELECT performance against UUID fields in a MySQL database.
Full performance breakdown and write up can be found here; http://blog.simplicitymedialtd.co.uk/?p=437
So far, the best option seems to be storing the UUID as a BINARY(16) - anyone have any thoughts on this?
Thanks
Cal
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