Subject Re: Why it's soo slow ? it's just a very simple select ...
Author nathanelrick
Thanks for your study that show the problem i try to point !

> I can only image that the unrelated contents of a table somehow impact on
> the performance of an index - no idea why.

yes, and worse, with blob instead of varchar it's the same ... but i always learn than blod are store outside the table and only blodID (so 8 bytes only) are store inside the table.