MySQL Innovation Day held on June 5, 2012 was a great event for the MySQL engineers, users and customers to gather, share and network. I was able to get a few minutes with Tomas Ulin, Vice President of MySQL Engineering at Oracle, to ask him some questions. Here are the highlights of my interview with Tomas.

Monica: This was the first MySQL Innovation Day, correct?  Why now, what was the strategy behind hosting this kind of event?

Tomas: In the last year, we have rolled out an incredible number of MySQL events worldwide – some targeted at developers that are new to MySQL and others for the MySQL savvy. At the MySQL Innovation Day, our first event of this kind,, we had a number of our key engineers presenting lightning talks delivering previews of key new features as well as discussing roadmap. …

The Percona Toolkit team is happy to announce the release of Percona Toolkit versions 2.0.5 and 2.1.2. These are bug-fix releases in the 2.0 and 2.1 series, respectively. These releases fix many dozens of bugs, and we suggest that users upgrade to the latest versions of the tools.

The complete list of changes is on Launchpad for 2.0.5 and 2.1.2. Here are some highlights of the changes in version 2.1.2, which is the current development focus:

• We fixed several bugs in pt-table-sync that prevented it from working properly, and disabled the –lock-and-rename feature when using it with MySQL versions that don’t support it reliably.
• We enhanced pt-table-checksum and pt-online-schema-change to add even more safety checks, and to detect and deal with …

Taxonomy upgrade extras: innodbmaterialized viewsmaterialised viewsmyisamselectshadow tablecount

Its a known problem that changing the Storage Engine from MyISAM to InnoDB can cause some problems [ 1 ] if you have queries of this type:

SELECT COUNT(*) from table;

Luckily this query happens rarely and if, the …

Read the original article at What Recession? – New York Tech Hiring Frenzy

According to Crains, New York is digital jobs central.  ZocDoc, Thrillist, Foursquare and 10gen are just a few of the hot shots located at 568 Broadway, a tech hub in Soho.  Each of these firms is looking to double their headcount in the coming year.  Not bad considering the rough shape much of the economy is in.

Don’t Forget the Big Boys

Let’s not forget the huge tech firms that are also on a hiring binge,  Google, Facebook, Zynga, Twitter & Skype are all hiring.  Bloomberg Businessweek describes it literally as …

We haven’t posted any Windows benchmarks for a while, and MariaDB for Windows contains some specific improvements which might not be widely know since we haven’t talked much about them yet. This post is an attempt to fix that. We’ll also share current MySQL 5.5 numbers.

My setup is an 8 core 2 socket server (yes, a little bit dated for today, but it is the best machine I have at my disposal), 10K SAS disks with RAID1. I ran sysbench 0.4 single table / 1,000,000 records. I ran the benchmark over a network, with the number of concurrent clients ranging from 4 to 4096.

Here is what OLTP-readonly throughput looks like:

• For most of the tests, MariaDB’s throughput is approx 10% higher than MySQL’s
• For 4096 concurrent clients, MariaDB’s throughput is better than MySQL 5.5 by 476% (2382 vs 413 TPS).

Many people rightfully remark that …

Do you rely on pt-diskstats from Percona Toolkit instead of the standard iostat a lot? There appears to be a nasty bug in pt-diskstats 2.1, which makes it produce bad results.

I noticed some of the numbers I was getting weren’t right, so I tried running iostat and two different releases of pt-diskstat side by side. Here’s what I got:

I can understand the slight differences between the lines in iostat and pt-diskstats 2.0 as they probably weren’t reading /proc/diskstats contents in the same moments, so the values they were seeing could be a bit different. However both lines practically show the same thing.

On the other hand, the line based on the pt-diskstats 2.1 output looks completely different. It seems like maybe the script returns some kind of averages rather than per second deltas. I filed a …

If you ever get an error with MySQL client library:

php: error while loading shared libraries: libmysqlclient.so.16: cannot open shared object file: No such file or directory

while using Percona MySQL Server 5.5 just go ahead and install Percona-Server-shared-compat package from Percona Repo:

yum install Percona-Server-shared-compat

Every once in a while questions like the one in MySQL Bug #60843 or Bug #19567 come up:

What collation should i use if i want case insensitive behavior but also want all accented letter to be treated as distinct to their base letters?

or shorter, as the reporter of bug #60843 put it:

I need something like utf8_bin + ci

utf8_general_ci and utf8_unicode_ci unfortunately do not provide this behavior and utf8_bin is obviously not case insensitive.

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Retrouvez SkySQL et ses partenaires sur le stand C21 du Salon Solutions Linux 2012 au CNIT à Paris du 19 au 21 juin

Cette année, le Salon Solutions Linux à Paris coincide avec la Fête de la Musique. C’est donc avec enthousiasme que nous nous préparons pour cet évènement annuel incontournable dédié aux logiciels libres et à l’Open Source.

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Many of you heard of this nasty security vulnerability in MySQL, and as we are getting a lot of inquiries how does it affect Percona Server, I decided to address it in this post.

• The issue exists in the source code of MySQL 5.5.23 or earlier and MySQL 5.1.62 or earlier. The same is true for Percona Server, as we share the same code base.
• However binaries provided by Percona do not have this problem, as in our build process we do not use sse-optimized glibc memcmp. This is true for any version of Percona and all tar.gz, RPM and DEB packages. Once again, if you use binary builds, provided by Percona from our official download area, or from our repositories, you are safe.
• If you use your own or third-party binaries, …