Before you think I’ve posted an animal story in my MySQL category please read on. For reference, The RAT and the CAT is something I wrote back in 2006, that explains the CAT part.

I was reviewing the website performance tonight of a client. I had access to an idle system so being lazy in collecting SQL after my initial audit of the system and MySQL, I turned on the General Query log and hit the home page. NOTE: Do not do this on a running production system, especially with any volume.

What I got was 77 lines of output (after I removed newlines in the queries). 74 were queries, and 72 were from the same table, via some unnecessarily complex sub-joins. I wish I could have laughed but it wasn’t really funny.

My Friday wisdom for writing SQL is this:

• Don’t write duplicate SQL statements
• Look the entire …

I just discovered today in the MySQL 5.1 Reference Manual a handy set of additional indexes in the System Navigation section.

• Index
• Standard Index
• C Function Index
• Command Index
• Function Index
• INFORMATION_SCHEMA Index
• Transaction Isolation Level Index
• JOIN Types Index
• Operator Index
• Option Index
• Privileges Index
• SQL Modes Index
• Status Variable Index
• Statement/Syntax Index
• System Variable Index

Perhaps they have been around for some time and I’ve not noticed, but there are much better then searching when you know the content type as per the index list on what you are searching for.

As a consultant I would be rich if I made money every time when asking “Have you checked the MySQL error log?”

Today’s special found in a 13GB MySQL server error log.

090819 22:49:37InnoDB: Warning: difficult to find free blocks from
InnoDB: the buffer pool (1101071 search iterations)! Consider
InnoDB: increasing the buffer pool size.
InnoDB: It is also possible that in your Unix version
InnoDB: fsync is very slow, or completely frozen inside
InnoDB: the OS kernel. Then upgrading to a newer version
InnoDB: of your operating system may help. Look at the
InnoDB: number of fsyncs in diagnostic info below.
InnoDB: Pending flushes (fsync) log: 0; buffer pool: 0
InnoDB: 167 OS file reads, 1 OS file writes, 1 OS fsyncs
InnoDB: Starting InnoDB Monitor to print further
InnoDB: diagnostics to the standard output.
090819 22:49:37InnoDB: Warning: difficult to find free blocks from
InnoDB: the buffer pool (1101051 search iterations)! Consider
InnoDB: increasing …

Giuseppe Maxia writes about the availability of the active development/test ("pushbuild") MySQL binaries for users—on multiple platforms.

This is a wonderful step forward in bringing greater openness to current MySQL development and in bringing greater value to the MySQL user community!  

Giuseppe Maxia writes about the availability of the active development/test ("pushbuild") MySQL binaries for users—on multiple platforms.

This is a wonderful step forward in bringing greater openness to current MySQL development and in bringing greater value to the MySQL user community!  

Giuseppe Maxia writes about the availability of the active development/test ("pushbuild") MySQL binaries for users—on multiple platforms.

This is a wonderful step forward in bringing greater openness to current MySQL development and in bringing greater value to the MySQL user community!  

Some time ago I posted a compilation of applications and programming languages that provide an API to connect to the MySQL Server. As it turned out, I forgot a few that I would like to mention here:

• Apache DBD API: a MySQL driver for mod_apr_dbd is not included in the official distribution, but can be obtained seperately from here. Some distributions (e.g. openSUSE) actually provide installable packages of this driver module.
• GRASS MySQL driver …

Reggie Burnett, the lead behind MySQL Connector/NET, will be presenting a MySQL webinar, "For ISVs: ADO.NET Entity Framework for MySQL", tomorrow at 10 Pacific Time!

Among other topics, Reggie will discuss how to

• Develop your application against SQL Server and then switch it to MySQL with zero code changes

• Optimize your database schema without requiring any code changes in your application

• Use LinQ syntax for type safety in your applications

(Interest in using MySQL on Windows is growing. The 2008 MySQL OEM Annual Survey, which closed in March 2009, shows that some 73% of MySQL OEM customers develop …

Reggie Burnett, the lead behind MySQL Connector/NET, will be presenting a MySQL webinar, "For ISVs: ADO.NET Entity Framework for MySQL", tomorrow at 10 Pacific Time!

Among other topics, Reggie will discuss how to

• Develop your application against SQL Server and then switch it to MySQL with zero code changes

• Optimize your database schema without requiring any code changes in your application

• Use LinQ syntax for type safety in your applications

(Interest in using MySQL on Windows is growing. The 2008 MySQL OEM Annual Survey, which closed in March 2009, shows that some 73% of MySQL OEM customers develop …

Reggie Burnett, the lead behind MySQL Connector/NET, will be presenting a MySQL webinar, "For ISVs: ADO.NET Entity Framework for MySQL", tomorrow at 10 Pacific Time!

Among other topics, Reggie will discuss how to

• Develop your application against SQL Server and then switch it to MySQL with zero code changes

• Optimize your database schema without requiring any code changes in your application

• Use LinQ syntax for type safety in your applications

(Interest in using MySQL on Windows is growing. The 2008 MySQL OEM Annual Survey, which closed in March 2009, shows that some 73% of MySQL OEM customers develop …