-character-set
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Jaime Crespo
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/mysqldump.html#option_mysqldump_compatible
Anyway, most of the times you will need a more manual migration, with
human intervention (custom scripts) and migrating the data through
something like CSV (SELECT... INTO OUTFILE).
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Jaime Crespo
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http
/control-flow-functions.html#function_ifnull
Anyway, you should get rid of misplaced NULL fields, as they also
affect performance.
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) values ('test data');
Query OK, 1 row affected (0.00 sec)
mysql select id from mytable where id is null; -- OMG!!!
++
| id |
++
| 1 |
++
1 row in set (0.00 sec)
--8--8--8--8--8--8--8--8--8--8--8--
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Jaime Crespo
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/connector-odbc-configuration-connection-parameters.html
Charsets can be a mess if you have several layers and only one of them
fails, but if you understand fully all of MySQL parameters is not so
difficult.
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Jaime Crespo
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the official guide:
http://dev.mysql.com/doc/refman/5.1/en/installing-binary.html
MySQL works flawlessly on Ubuntu.
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/5.1/en/automatic-start.html
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: row and statement-based.
Please, have a look at the manual page:
http://dev.mysql.com/doc/refman/5.1/en/replication-formats.html
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in the replication process, it
stops. You have to solve the issues manually and then start the
replication again. This usually occurs due to the
synchronous/distributed nature of the replication.
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if MySQL gives some support to handle this
(auto-increment-offset, replicate-ignore-table), you should mostly
handle it at business logic (application server) layer, not in the
MySQL database. Alternatively, as Johan pointed, have a look at the
semi-synchronous replication.
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Jaime Crespo
MySQL
and the REPAIR command should be
able to regenerate an MYI file from a .MYD and .frm files.
After all, MDI file only contains the disk version of the indexes.
Beware of possible issues if using different server version, though.
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--
MySQL
)
--8
Regards,
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.
There also exists a tool to get introduced into MySQL server variables
tuning: Tuning primer - https://launchpad.net/mysql-tuning-primer It
is also a very general tool, but it could be helpful for a starting
point.
Regards,
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Jaime Crespo
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there is a manual page discussing the changes done for the 5.1 version:
http://dev.mysql.com/doc/refman/5.1/en/innodb-auto-increment-handling.html
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between
master writes and slaves see the data). I am sorry I cannot help you,
but please, share here if you found something useful AND with good
performance.
Merry Xmas!
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to coordinate the db servers
(sharding, replication, ndb), the kind of applications you are going
to deploy and how much scability you need.
I hope that helps. Regards,
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,
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cluster
on a single host? Anyway, I suppose performance loses on distributed
joins and so on would outcome multiple-core benefits. And for most
queries, the bottleneck is usually on disk access, not processor. Has
anybody done any serious testing on this?
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of load balancing while performing administrative tasks.
If you could have a pre-production host to test these kind of
operations it would be great! Each application is a world on its own.
You can read more info here:
url:http://dev.mysql.com/doc/refman/5.1/en/optimize-table.html
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Jaime Crespo
.
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] INTO
OUTFILE '/var/www/folder/table_name.txt' FROM table_name WHERE [any,
filter, you, want] ORDER BY [any, order, you, want]
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function is the way to go.
Anyway, check for performance issues: in that case, precalculating and
storing an aditional field would be the best way (it could be done
with a trigger, for example).
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to achieve similar results.
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2009/10/7 Brown, Charles cbr...@bmi.com:
Hello All. I would like to implement MYSQL slow query log in table. Can
someone kindly assist me with the table definition and implementation.
SHOW CREATE TABLE mysql.slow_log;
http://dev.mysql.com/doc/refman/5.1/en/log-tables.html
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Jaime Crespo
.).
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