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[Study Notes] The query optimizer and Last_query_cost [Original] 2009-11-18 12:15pm
MySQL uses a cost-based optimizer, which means it tries to predict the cost of variousexecution plans and choose the least expensive. The unit of cost is a single randomfour-kilobyte data page read. Y..

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[Study Notes] Speeding up [Original] 2009-11-10 12:54pm
Not all ALTER TABLE operations cause table rebuilds. For example, you can change or drop a column’s default value in two ways (one fast, and one slow). Say you want to change a film’s defa..

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[Study Notes] testing MySQL Cluster [Original] 2009-11-9 3:22pm
MySQL Clustering in a Sandbox MySQL Cluster Sandbox - pre-defined packages

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[Study Notes] How MySQL handles errors during trigger execution? [Original] 2009-11-4 4:22pm
MySQL handles errors during trigger execution as follows:     * If a BEFORE trigger fails, the operation on the corresponding row is not performed.    * A BEFORE trigger..

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[Study Notes] potential problems of Stored Programs in MySQL replication [Original] 2009-11-4 4:19pm
18.6. Binary Logging of Stored Programs However, there are certain binary logging issues that apply with respect to stored programs..

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[Study Notes] Disadvantages of mysql stored procedures [Original] 2009-11-4 4:17pm
• MySQL doesn’t provide good developing and debugging tools, so it’s harder towrite stored code in MySQL than it is in some other database servers.• The language is slow and prim..

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[Study Notes] spider data sharding and replication [Original] 2009-10-22 5:20pm
A. what is spider? (extracted from spider document) 1. Spider Storage Engine creates table links from local databases to remote databases.   Spider makes available tables in remote MySQL..

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[Study Notes] MySQL cluster summary [Original] 2009-9-17 10:57pm
MySQL Cluster features Overview:• MySQL Cluster is a technology that enables clustering of in-memorydatabases in a shared-nothing system.• MySQL Cluster is designed not to have any single point of fai..

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[Study Notes] MySQL Cluster Performance [Original] 2009-9-1 3:40pm
MySQL Cluster has a very different impact on the concepts of response time, throughput, and scalability than a normal single-system, disk-based database, such as MyISAM or InnoDB.   Response ti..

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[Study Notes] SQL_CALC_FOUND_ROWS and FOUND_ROWS() [Original] 2009-8-26 11:58am
SQL_CALC_FOUND_ROWS and FOUND_ROWS() can be useful in situations when you want to restrict the number of rows that a query returns, but also determine the number of rows in the full result set without..

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