Filetype:pdf. Workbench. How to keep MySQL replication in sync. There is a great article on how using LIMIT clauses in update and delete statements can produce different results on a slave than it did on the master. If you really want to keep a master and slave in sync, I have a larger list of rules to follow for SQL that is run on a master. They might not be popular but they make it easy to run a large number of replication slaves with few problems. Do not use LIMIT clauses in statements that can change rows (see Baron's article ) Do not use session variables in SQL statements that might be written to the binlog. This is OK to do on recent MySQL versions, but some of us still use old releases.
Do not use temporary tables on the master. Do not use MyISAM tables on the slave. Do not use MyISAM tables on the master. Do not allow the slave to crash. With many thanks to Peter for documenting the problems , do not use replicate-ignore-db and binlog-ignore-db . How MySQL Sandbox Solves All My Problems « OneFreeVoice. How MySQL Sandbox Solves All My Problems I just can’t help thinking about how amazing and useful MySQL Sanbox is. There are so many things that it can do, and so many problems that it solves for Database Developers. Chris Shiflett: Guru Speak: Storing Sessions in a Database. Welcome to another edition of Guru Speak.
I believe that one of the hallmarks of a good writer is the ability to mold a complex topic into something both palatable and interesting. These are the characteristics I strive for in Guru Speak, and I hope you consider my efforts to be a success. Please be sure to let me know what issues tend to trouble you the most or in what areas you would like to expand your knowledge and understanding. I am happy to cater to my readers. This edition's topic is storing sessions in a database. Background While the default session storage mechanism is adequate for many PHP developers, you might find yourself wanting to modify its behavior from time to time. The application needs to be able to run on multiple servers without server affinity (methods that direct requests from the same client to the same server).
Luckily, PHP makes this task very easy. Session Data Store Before you can store sessions in a database, you need to create a table. _open() and _close() Setting Up A MySQL Cluster. Posted by Artem Russakovskii on March 26th, 2008 in Databases , Linux , Programming , Technology This article contains my notes and detailed instructions on setting up a MySQL cluster. After reading it, you should have a good understanding of what a MySQL cluster is capable of, how and why it works, and how to set one of these bad boys up. Note that I'm primarily a developer, with an interest in systems administration but I think that every developer should be able to understand and set up a MySQL cluster, at least to make the dev environment more robust. Open Source PHP Forum Software. 101 Tips to MySQL Tuning and Optimization at Monitor Everything IT: Website, Server, Application, Network. 100% Free! MySQL is a powerful open-source database.
With more and more database driven applications, people have been pushing MySQL to its limits. Here are 101 tips for tuning and optimizing your MySQL install. Some tips are specific to the environment they are installed on, but the concepts are universal. I have divided them up into several categories to help you with getting the most out of MySQL: MySQL Server Hardware and OS Tuning: 1. MySQL Configuration: 25. MySQL Schema Optimization: 40. Query Optimization: 63. MySQL Backup Procedures: 87. And finally 101: Perform MySQL monitoring: Monitis Unveils The World’s First Free On-demand MySQL Monitoring.
For key MySQL health metrics also look at our white paper: The Monitis Internal MSQL Server Monitoring Monitis is an all-in-one hosted systems monitoring platform for small and medium-sized businesses. 70,000 sysadmins and IT managers use Monitis platform to monitor their websites, applications and networks. Common Queries Tree. Common MySQL Queries Basic aggregation Aggregates are more popular than any other lookup topic here, by a ratio of more than 2 to 1. Basic aggregation is the simplest grouping query pattern: for column , display the smallest, largest, sum, average or some other statistic of column values: SELECT foo, MIN(bar) AS bar FROM tbl GROUP BY foo Return the highest value for each , ordering top to bottom by that value: SELECT foo, MAX(bar) AS Count ORDER BY Count DESC; Ditto for AVG(), COUNT() etc.
For aggregating functions like MIN() and MAX() that return a single value, there may be multiple instances of the result. Developing MySQL Database Applications With PHP Part 1: Using the MySQL Improved Extension, mysqli. Oracle Technology Network > Java Software Downloads View All Downloads Top Downloads New Downloads What's New Java in the Cloud: Rapidly develop and deploy Java business applications in the cloud.
Essential Links Developer Spotlight Java EE—the Most Lightweight Enterprise Framework? MySQL GUI Tools Downloads.