Tag: MySQL

Log Buffer #226, A Carnival of the Vanities for DBAs

In your hands, the new edition of Log Buffer is smiling and it wants your undivided attention, because it is full of selected simmering yet cool blog posts from around the blogistan of database arena. Enjoy the Log Buffer #226.

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Replication and EC2 gotcha

Tonight a client restarted some instances on EC2 and they got different IPs. This broke replication because the slaves were trying to connect to the masters using IPs that weren’t existing any more. To solve the task is easy: just…

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Log Buffer #225, A Carnival of the Vanities for DBAs

March of bloggers goes on and so is the unstoppable production of the blog posts. It’s getting more exciting week after week watching the new and old bloggers adding spice to the database blogosphere. This edition of Log Buffer brings some of the simmering and scintillating posts from around the globe in Log Buffer #225.

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Silent MyISAM Table Definition Changes and mysqldump

While trying to move a schema from one MySQL server to another, I encountered a very odd issue. The schema to be moved contained both MyISAM and InnoDB tables, so the only option I had was to dump the schema using mysqldump on the source server and import it on the destination server. I did some digging and found that the problem was that the MyISAM engine silently changed the table definition without any indications. Here are some solutions.

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Upgrade to MySQL 5.1.56 on Bacula server using 5.0.x and MyISAM tables

In this blog, i’m going to review a recent MySQL upgrade I have done on one of the systems I am involved in administering. This is a real world example of an upgrade project, and hopefully when we’re done, there may even be an overall performance boost.

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Log Buffer #224, A Carnival of the Vanities for DBAs

There are many variates of mangoes and its hard to pick from them as they all are so sweet and eye catching. Same is the case with the database related blogs, when it comes to selection for the edition of Log Buffer. So once again here you are, about to savor the sweet blogs in Log Buffer #224.

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Status Update on How MySQL Handles the Partition(s) for Maintenance

Let us talk how OPTIMIZE partitions doesn’t work and what to do. I have set up a simple test instance with two tables, and use my stresstool (java), to fill the tables and play with the inserting threads.

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Pythian Webinar Update: Exadata, MySQL HA, Exalogic, ASM & more…

Please join Pythian for our next series of live and recorded webinars and have the chance to ask questions directly of our DBA experts. If you miss a session, you can always check out select recorded webinars here

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Log Buffer #223, A Carnival of the Vanities for DBAs

Social media is buzzing with the news and views of bloggers. From the database side of this glorious media, we have picked out some of the gems for you in this edition of Log Buffer, which is the Log Buffer #223.

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Designing Index to Eliminate Sorting

Using algorithm described in “Relational Database Index Design and the Optimizers by Tapio Lahdenmaki and Mike Leach”, I quickly came up with two indexes and while first one looked fine, I was really confused by the second one for the elimination of the sort. Let me show an example, not copy one from the book, but rather show a test I did with MySQL.

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