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From:Alexandre Vieira Date:September 2 2010 2:46pm
Subject:Performance problems on MySQL
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John, Johnny,

Thanks for the prompt answer.

mysql> SHOW CREATE TABLE clientinfo;
+------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table      | Create
Table
|
+------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| clientinfo | CREATE TABLE `clientinfo` (
  `userid` varchar(21) NOT NULL default '',
  `units` float default NULL,
  `date_last_query` datetime default NULL,
  `last_acc` int(10) unsigned default NULL,
  `date_last_units` datetime default NULL,
  `notification` int(10) unsigned NOT NULL default '0',
  `package` char(1) default NULL,
  `user_type` varchar(5) default NULL,
  PRIMARY KEY  (`userid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
+------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> SHOW INDEX FROM clientinfo;
+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
| Table      | Non_unique | Key_name | Seq_in_index | Column_name |
Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment |
+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
| clientinfo |          0 | PRIMARY  |            1 | userid      |
A         |      460056 |     NULL | NULL   |      | BTREE      |         |
+------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+
1 row in set (0.00 sec)


SELECT * FROM clientinfo WHERE userid='182106617';

UPDATE clientinfo SET
units=0.0,date_last_query=now(),user_type='POS',last_acc=167,date_last_units=now(),notification=0
WHERE userid='152633876';

INSERT INTO clientinfo VALUES ('171918726',101.0,now(),1,now(),0,'D','PRE')
ON DUPLICATE KEY UPDATE units=101.0, date_last_query=now(), last_acc=1,
date_last_units=now(), notification=0, package='D', user_type='PRE';

DELETE FROM clientinfo WHERE units='155618918';

There are no other type of queries.

We're running this DB on a Sun-Fire V240. 2xUIIIi 1.5ghz with 2GB of RAM.

We also run some other applications in the server, but nothing that consumes
all the CPU/Memory. The machine has almost 1GB of free memory and 50% of
idle CPU time at any time.

TIA

BR
Alex


On Thu, Sep 2, 2010 at 1:52 PM, John Daisley <daisleyjohn@stripped>wrote:

> What is the hardware spec? Anything else running on the box?
>
> Why are you replicating but not making use of the slave?
>
> Can you post the output of SHOW CREATE TABLE?
>
> Regards
> John
>
>
>

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