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This is a global buffer where MySQL caches frequently used blocks of index data for MyISAM data. Maximum allowed size is 4GB on a 32 bit platform. Greater values are permitted for 64-bit platforms beyond MySQL …

The MySQL Workbench team has released the latest Release Candidate 5.0.15 of their new DBMS modeling tool. This includes quite a few recent bug fixes and it's now rapidly approaching the GA status. The team continues on to fix all the minor nits out there so keep your feedback coming. Heck, they'll probably have a new version by the time I post this. If you've never used a database modeling tool or have been put off by the cost or complexity of these tools in the past, you should try MySQL Workbench. Mike Zinner and his team have focused on... READ MORE

I’m still looking for new entries. I get quite a few suggestions, but not all of them make it into quiz questions. Do send in your suggestions!

The maximum row size in a MySQL table in 64kb (65,535 bytes).

A LONGTEXT or LONGBLOB column may be up to 4,294,967,296 (4G) in size.

Explain how a LONGTEXT or LONGBLOB column fits into a MySQL table.

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yeah, it is all odbc, all the time here, it seems. that is just because i can’t write about the really exciting stuff. soon!

that is not to say that releasing mysql connector/odbc 5.1.3-rc is not a huge milestone! it took us a while to get there, but we finally have a unicode-aware odbc driver that is, in our opinions, production-ready. now we just need some community feedback to find out if we are right. there are a few minor issues we know about already, but the impact of those is generally small enough that the majority of folks should not have any problems.

I can’t remember the last time i used default mkfs or mount options… oh yeah, that’s right - by accident.

Anyway… I did a little experiment today.

The filesystem is my laptop /home - XFS, 100GB, 95% used (so 5-6GB free), rather aged. This is where a lot of my MySQL development is done. Mkfs options: 128MB log, version2 log. Mount options: logbufs=8, logbsize=256k. All of this geared towards increasing metadata performance.

Why metadata performance? well… source code trees are a lot of metadata :)

So, let’s try some things: cloning a repository and then removing the repository.

Two variables are being tested: mounting the file system with nobarrier (or barrier, the default). Write barriers tell the disk to ensure write order to the platter when write cache is in use. Also testing disabling (or enabling, the default) the disk write cache.

NOTE: the last option which …

Using regular expressions for query handling can become prohibitively complex after a while. If you need to manipulate parts of a query, either you are a regexp guru (I mean it, really, someone who speaks regular expressions more fluently than English) or you find some alternatives.

MySQL Proxy ships equipped with a tokenizer, a method that, given a query, returns its components as an array of tokens. Each token contains three elements:

• name, which is a human readable name of the token (e.g. TK_SQL_SELECT)
• id, which is the identifier of the token (e.g. 204)
• text, which is the content of the token (e.g. "select").

For example, the query SELECT 1 FROM dual will be returned as the following tokens:

1:
   text          select
   token_name    TK_SQL_SELECT'
   token_id      204
2: 
   text          1
 …

I have an ingrained (possibly even genetic) aversion to stock images. Actually, not all stock: just the vacuous kind. You know what I mean: like the politically-correct, gender-balanced, racially-balanced, age-diverse ones where people are all smiling and pointing at a computer screen you can’t see. Ugh!

(Photo credit: istockphoto.com)

There are many reasons not to use images like this. I guess it’s okay in some situations — for example when you just want a smiling, attractive woman with a customer-service headset to reinforce that you’ve come to the right place for support. However, even these really don’t have to be stock images. One of my former employers used their own employees for such photos, almost exclusively, and it made the site much more real. And there are plenty of examples of companies that use photos of their own employees and get “realness” as a result. If I’m not mistaken, …

yeah, it is all odbc, all the time here, it seems. that is just because i can’t write about the really exciting stuff. soon!

that is not to say that releasing mysql connector/odbc 5.1.3-rc is not a huge milestone! it took us a while to get there, but we finally have a unicode-aware odbc driver that is, in our opinions, production-ready. now we just need some community feedback to find out if we are right. there are a few minor issues we know about already, but the impact of those is generally small enough that the majority of folks should not have any problems.

I've been working on a very fun and challenging proof of concept / usability project that involves Pentaho Data Integration (Kettle), XUL, SWT, Swing and a very cool, slightly controversial theory: with a lot of work frontloaded, we should be able to port user interfaces to any UI technology, and expect consistent behavior AND look and feel without much, if any, additional code .

The project I'm in the middle of encompasses three different but equally compelling goals:

1. To move Pentaho forward in providing common layers across our core pillars (reporting , analysis, data mining, ETL and dashboards).
2. To provide a proof of concept for the Pentaho XUL Framework, an architecture built to help us support common UIs across all of our applications and tools .
3. To provide a common way of describing and managing the information needed to connect to a database.

So, we began by …

That story via MacWorld UK, very interesting. So first of all this allows people to edit photos (bitmaps) online. Secondly, Adobe doesn't try to reinvent the wheel but instead simply plugs into existing infrastructure like Facebook (and I would hope also Flickr). This is smart, as no one can rule it all, you really can't expect to be the one-stop shop that everybody uses. In addition, Adobe makes some useful graphics/publishing tools, they're not a social networking or photosharing company (perhaps they could be, but that's another issue altogether).

Although I follow this stuff in relation to my developing training courses on MySQL and related topics, I'm more interested in the pattern than in this particular event. But I do believe it's significant. Not that SaaS (software as a service) is the solution to …