In previous articles, we examined the maximum performance of basic web static and dynamic (php) requests. In this article, we will take a look at what happens when a database access is added to a simple php page. The application code is part of the corelamp workload (see webapp/hellomysql.php).
In this application, I added a single database row request to the TABLES table in the …
[Read more]My talk on 10x performance improvements – A case study has just been approved for the 2010 MySQL Conference. This will be my 5th straight year speaking at the MySQL conferences. For those in Europe wanting a sneak peek I am also speaking at FOSDEM 2010 in Brussels on Feb 7th where I’ll be giving an abridged version.
As an independent MySQL consultant, my work generally covers performance tuning and scalability and sometimes database architecture. Often however my work involves a review of a given problem and recommendations (immediate, short and long term). I’m rarely involved in the full implementation and generally do not see the full fruits of the proposed work.
Recently however I was able to work with a client, first in resolving …
[Read more]First of all, I'd like to thank everyone who read and gave their 2 cents about the [WordPress Plugin Development] How To Include CSS and JavaScript Conditionally And Only When Needed By The Posts post. The article was well received and will hopefully spark some optimizations around loading styles and scripts.
Here are some discussions and mentions around the web:
I began porting the dba module to Drupal 7 as an opportunity to learn more about the new database abstraction layer. In this upcoming Drupal release, our database layer is now built upon the PHP Data Objects (PDO) data-access abstraction layer, introducing new syntax and symantecs into writing queries with Drupal. A powerful new query builder makes it possible to easily write queries that run on any database type supported by Drupal, currently including MySQL, PostgreSQL and SQLite.
The dba module was always intended to be a useful tool for any database administrator, and toward that end I have recently merged in mysqlreport functionality which utilizes MySQL's server statistics to offer an overview of server health and performance. As an …
[Read more]Good news for everyone that has wanted the performance tuning abilities of Kontrollbase – the opensource enterprise monitor for MySQL – but didn’t want to install a centralized monitoring application for their MySQL database servers. Now the same performance tuning reports are available in a single script that can be run from the command line [...]
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On January 13th I will be in Dubai, UAE, on my way to Wellington, New Zealand. I will be at the MySQL User Group, hosted at Sun Microsystems offices at 6pm. I will talk about boosting performance with MySQL 5.1 partitions, covering the recent 5.5. additions. The meeting is open to all. If you want to attend, please register at the meetup page. |
By default InnoDB uses REPEATABLE READ as its isolation level. So this is the isolation level used with innoDB by almost all MySQL users.
The default isolation level of Oracle is READ COMMITTED. READ COMMITTED is the mode widely used by Oracle users. This mode incurs less penalty on the server scalability by allowing to [...]