On Wed, Jul 14, 2004 at 11:24:17AM -0700, Devananda wrote:
> Thanks for the clarification :) However, I'm still not convinced that
> the index is working in the same fasion as it does for MyISAM and InnoDB
> tables. Let me explain ... today I filled this table up with 2.5mil rows
> and then did
>
> select username from tdata order by username limit 5;
>
> Since username is indexed I would expect this query not to take very
> long, and in a MyISAM table it doesn't, but for me with NDB, this takes
> about a full minute. You can see this same (mis)behaviour in the data I
> already sent - without the 'order by' clause the statement returns in
> 0.00 sec (hehe), and when ordered by username, it takes 1.5sec. This was
> only on 2.5k rows, with no other load on the database - unacceptably slow.
>
> Do you understand why I think there is a problem? If not, what is
> unclear in my examples, I will try to clarify.
>
> Thank you for taking the time to respond :)
Doesn't NDB primarily used hash indexes? If so, how would you expect
them to help? It's like HEAP tables before MySQL 4.1.
Jeremy
--
Jeremy D. Zawodny, <jzawodn@stripped>
Technical Yahoo - Yahoo MySQL Geek
Desk: (408) 349-7878 Cell: (408) 685-5936
