RE: query performance slow

I had looked into that and it seems that it's on by default in 5.1:

mysql> show variables like '%push%';

+---------------------------+-------+
| Variable_name             | Value |
+---------------------------+-------+

+---------------------------+-------+

mysql>  

-----Original Message-----
From: Anatoly Pidruchny [mailto:apidruchny@newxt.com] Sent: Wednesday, July 25, 2007 12:00 PM
To: Bob Pisani
Cc: 'cluster@lists.mysql.com'
Subject: Re: query performance slow

Bob,

did you try to use engine_condition_pushdown option?

http://dev.mysql.com/doc/refman/5.1/en/explain.html

Regards,

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Anatoly.
> Hey all,
>
> I'm doing some testing of cluster, 5.1.20, on SuSE 10.2. 1 mysql node,
> 2 data nodes. I have a disk based table, orders, with a primary key on
> order time and order id. I loaded 1M+ rows into the table and queried as
follows:
>
> select * from orders where order_id = 'h0r50000145096' and order_time
> = '20070718093222'; ....
> 1 row in set (0.01 sec)
>
> select * from orders where order_id = 'h0r50000145096' and order_time
> > '20070718090000' and order_time < '20070718100000'; ....
> 1 row in set (1 min 27.38 sec)
>
> Running an explain on the second query shows:
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> -+------+------+-----------------------------------+
> | id | select_type | table | type | possible_keys | key |
key_len
> | ref | rows | Extra |
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> -+------+------+-----------------------------------+
> | 1 | SIMPLE | orders | range | PRIMARY | PRIMARY | 24
> | NULL | 1 | Using where with pushed condition |
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> +----+-------------+-------------+-------+---------------+---------+--
> -+------+------+-----------------------------------+

>

>

>

>
>
>

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