Mysql4oracledba
If you missed MySQL Idiosyncrasies that BITE
I recently gave a webinar to the LAOUC and NZOUG user groups on MySQL Idiosyncrasies that BITE. For the benefit of many viewers that do not use English as a first language my slides include some additional information from my ODTUG Kaleidoscope presentation in June.
Read more2010 MySQL Conference Presentations
I have uploaded my three presentations from the 2010 MySQL Users Conference in Santa Clara, California which was my 5th consecutive year appearing as a speaker. IGNITION – MySQLCamp for Oracle DBA – Volume I LIFTOFF – MySQLCamp for Oracle DBA – Volume 2 10x Performance Improvements – A Case Study A full history of my MySQL presentations can be found on the Presenting page.
Read moreDon’t Assume – Per Session Buffers
MySQL has a number of global buffers, i.e. your SGA. There are also a number of per session/thread buffers that combined with other memory usage constitutes an unbounded PGA. One of the most common errors in mis-configured MySQL environments is the setting of the 4 primary per session buffers thinking they are global buffers.
Read moreDon’t Assume – Data Integrity
MySQL has the same level of data integrity for numbers and strings as Oracle; when MySQL is correctly configured. By default (a reason I wish I knew why it is still the default), MySQL performs silent conversions on boundary conditions of data that will result in your data not always being what is specified.
Read moreDon’t Assume – Transactions
MySQL by default is a NON transactional database. For the hobbyist (See The Hobbyist and the Professional ), startup entrepreneur and website developer this may not appear foreign, however to the seasoned Oracle DBA who has only used Oracle the concept is very foreign.
Read moreDon’t Assume – Common Terminology
In Oracle the default transaction isolation is READ_COMMITTED. In MySQL the default is REPEATABLE_READ. Because MySQL also has READ_COMMITTED I have seen in more then one production MySQL environment a transaction isolation of READ_COMMITTED.
Read moreDon’t Assume – Session Scope
MySQL system variables and status variables have two scopes. These are GLOBAL and SESSION which are self explanatory. This is important to realize when altering system variables dynamically. The following example does not produce the expected results.
Read moreDon’t Assume Series – MySQL for the Oracle DBA
As part of my MySQLCamp for the Oracle DBA series of talks to help the Oracle DBA understand, use and appreciate MySQL I have also developed a series of short interesting posts I have termed “Don’t Assume”.
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