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Intel 320 SSD read performance

 | July 29, 2011 |  Posted In: Benchmarks, Hardware and Storage

(this is cross-post from While PCI-e Flash cards show great performance, I am often asked about alternatives, as price for PCI-e cards is still significant and not acceptable for small companies and startups. Intel 320 SSD appears to be a popular drive with a quite acceptable price. I wrote about write performance of these […]

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Cage Match: OldSQL, NoSQL and NewSQL

 | July 29, 2011 |  Posted In: Tokutek, TokuView

  When I interviewed at Tokutek, I met a team of distinguished academics and engineers who could calmly and thoughtfully wax eloquent about the finer points of B-tree and Fractal Tree™ indexing,  drive I/Os, and database engines. Soon after, I discovered that several of my colleagues have a second passion — they practice Mixed Martial […]

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Reasons for MySQL Replication Lag

 | July 29, 2011 |  Posted In: Insight for DBAs, MySQL

One common theme in the questions our MySQL Support customers ask is MySQL Replication Lag. The story is typically along the lines everything is same as before and for some unknown reason the slave is started to lag and not catching up any more. I always smile at “nothing has changed” claim as it usually […]

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Percona Server 5.1.57 with Galera 0.8.1

 | July 28, 2011 |  Posted In: Events and Announcements, MySQL, Percona Software

Codership team announced availability of MySQL/Galera 0.8.1, which is minor release, but actually it has bunch of improvements that makes Galera replication more user friendly (there are many bugs fixed, reported by me personally, what annoyed me a lot). As part of my evaluation activity I ported MySQL/Galera 0.8.1 to Percona Server/Galera 0.8.1 and you […]

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How Innodb Contention may manifest itself

 | July 28, 2011 |  Posted In: Insight for DBAs, MySQL

Even though multiple fixes have been implemented in Percona Server and MySQL 5.5, there are still workloads in which case mutex (or rw-lock) contention is a performance limiting factor, helped by ever growing number of cores available in the systems. It is interesting though the contention may manifest itself in the different form from the […]

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What’s required to tune MySQL?

 | July 27, 2011 |  Posted In: Insight for DBAs, MySQL

I got a serendipitous call (thanks!) yesterday asking what would be needed to tune[1] a database for better performance. It is a question that I hear often, but I never thought about answering it in public. Here’s a consolidated version of what I explained during our conversation.

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This Weekend in Japan

 | July 25, 2011 |  Posted In: Tokutek, TokuView

We were happy to see a lot of folks from Japan on Twitter this weekend having a discussion about MySQL and Tokutek. While we always endeavor to explain ourselves as simply as possible, hearing what users and peers have to say and ask in their native language is very helpful. Here is a sampling of […]

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Percona Xtrabackup 1.6.2 released!

 | July 25, 2011 |  Posted In: MySQL, Percona Software

Percona is glad to announce the release of Percona XtraBackup 1.6.2 on 25 July, 2011 (Downloads are available here and from thePercona Software Repositories). This release is purely composed of bug fixes and is the current stable release of Percona Xtrabackup. All of Percona’s software is open-source and free, all the details of the release and […]

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Percona Live London!

 | July 20, 2011 |  Posted In: Events and Announcements, MySQL

The first Percona Live Conferences in San Francisco and New York were such wonderful successes that we have been inspired to take it across the ocean into the UK. We are therefore proud to announce that our next Percona Live Conference will be held London October 24-25, 2011 . Registration is now open and we […]

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Server Outages at Percona

 | July 19, 2011 |  Posted In: Events and Announcements

On Saturday July 16, Percona suffered a catastrophic failure of three disks on our primary web server. This was compounded by unexpected problems in recovery from our backups arising from staff changes. The net result is that several Percona web properties were offline from several hours to several days and that our cleanup continues. Interruptions […]

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