Yeah, I have a similar box like yours. I copied the first column to a new
table with an index. I ran select distinct and the query took 6 seconds to
execute. This must have to do with the record length, because when I indexed
the origional table's first column the query was 1 minute 30 seconds to
Well, it's an InnoDb database and has some decent memory pools.
| innodb_additional_mem_pool_size | 33554432
| innodb_buffer_pool_size | 536870912
-Original Message-
From: Joseph Bueno [mailto:[EMAIL PROTECTED]
Sent: Monday, September 15, 2003 11:47 AM
To: Nathan Cassa
>
> From: Haydies [mailto:[EMAIL PROTECTED]
> Sent: Monday, September 15, 2003 11:19 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Select distinct speed on an indexed column
>
>
> Its a compound key, they are always slow. I would imagin you will need to
> seriously redesign your database to speed t
mysql> explain select distinct AccountLevelId from PostedZpdi;
++---+---+-+-+--+-+-
+
| table | type | possible_keys | key | key_len | ref | rows|
Extra |
++---+---+-+--
Hey everyone,
I have a question about the speed of selecting distinct values on an
indexed column. I have a table with a five column primary key and 3,215,540
records. I want to select all of the distinct values of the first column in
the primary key. This column only has 549 distinct valu
