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 | July 14, 2010 | 

(cross posting from SSDPeformanceBlog.com ) All modern solid state drives use NAND memory based on SLC (single level cell) or MLC (multi level cell) technologies. Not going into physical details – SLC basically stores 1 bit of information, while MLC can do more. Most popular option for MLC is 2 bit, and there is movement […]

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Scaling: Consider both Size and Load

 | July 13, 2010 |  Posted In: Insight for Developers, MySQL

So lets imagine you have the server handling 100.000 user accounts. You can see the CPU,IO and Network usage is below 10% of capacity – does it mean you can count on server being able to handle 1.000.000 of accounts ? Not really, and there are few reasons why, I’ll name most important of them: […]

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Percona at OSCON 2010

 | July 13, 2010 |  Posted In: Events and Announcements, MySQL

This year we’re participating in OSCON as a Sponsor and organizing some BOFs. I will be on the conference 21 and 22 if you’re interested to chat. Here is the list of currently scheduled BOFs which I’ll be hosting: Running Databases on Flash Storage Sphinx Search 2010 XtraDB, XtraBackup, Maatkit, Percona Server See you there.

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Intro to OLAP

 | July 12, 2010 |  Posted In: Insight for Developers, MySQL

This is the first of a series of posts about business intelligence tools, particularly OLAP (or online analytical processing) tools using MySQL and other free open source software. OLAP tools are a part of the larger topic of business intelligence, a topic that has not had a lot of coverage on MPB. Because of this, […]

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Query Response time histogram – new feature in Percona Server

 | July 11, 2010 |  Posted In: MySQL, Percona Software

Recently we had couple posts dedicated to performance monitoring, i.e. Color code your performance numbers, Performance Optimization and Six Sigma, so you may understand we consider stability of performance numbers as one of important area for database management. That’s why we decided to add histogram of queries response times into Percona Server, and our software […]

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How is join_buffer_size allocated?

 | July 5, 2010 |  Posted In: Insight for DBAs, MySQL

When examining MySQL configuration, we quite often want to know how various buffer sizes are used. This matters because some buffers (sort_buffer_size for example) are allocated to their full size immediately as soon as they are needed, but others are effectively a “max size” and the corresponding buffers are allocated only as big as needed […]

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