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Displaying posts with tag: MySQL 5.5 (reset)

MySQL 5.5.40 Overview and Highlights
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MySQL 5.5.40 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://dev.mysql.com/downloads/mysql/5.5.html

This release, similar to the last 5.5 release, is mostly uneventful.

There were 0 “Functionality Added or Changed” bugs this time, and 18 bugs overall fixed.

Out of the 18 bugs, most seemed rather minor or obscure, but there are 3 I think are worth noting (all 3 are InnoDB-related, regressions, and serious if you encounter them, so best to be aware of them):

  • InnoDB: An …
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Downgrading from MySQL 5.6 to MySQL 5.5
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Last week I had to downgrade from MySQL 5.6 to 5.5. The reason for this was that the application used a very old Connector/J and that's incompatible with MySQL 5.6 because the removal of SET OPTION syntax.

We're now planning to upgrade Connector/J to be able to upgrade to 5.6 again.

There are two methods of downgrading:

  • Dump/Restore with mysqldump. This is easy and reliable, but can take more time.
  • In place (replace binaries, don't change data). This fast, but won't work if file formats have changed.

As expected …






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MySQL 5.5.39 Overview and Highlights
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MySQL 5.5.39 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://downloads.skysql.com/archive/index/p/mysql/v/5.5.39

This release, similar to the last 5.5 release, is mostly uneventful.

There were two “Functionality Added or Changed” and 24 bugs fixed.

The “Functionality Added or Changed” changes are:

  • CMake support was updated to handle CMake version 3.
  • The timed_mutexes system variable has no effect and is deprecated.

Out of the 24 …

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MySQL 5.5.38 Overview and Highlights
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MySQL 5.5.38 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://downloads.skysql.com/archive/index/p/mysql/v/5.5.38

This release, similar to the last 5.5 release, is mostly uneventful.

Out of the mere 13 bugs, most were benign, but I thought there were two worth mentioning (just because one is a slight performance improvement for InnoDB, and the other relates to slave consistency, so always important to see if it could affect you):

  1. InnoDB: For each insert, memset would …
  [Read more...]
MySQL 5.5.37 Overview and Highlights
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MySQL 5.5.37 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://downloads.skysql.com/archive/index/p/mysql/v/5.5.37

This release, similar to the last 5.5 release, is mostly uneventful.

There was one new feature added (Solaris-specific + obscure), and only 21 bugs fixed.

The new feature is this:

  • On Solaris, mysql_config –libs now includes -R/path/to/library so that libraries can be found at runtime.

Out of the 21 bugs, most were benign, but there was one definitely worth mentioning …

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MySQL 5.5.36 Overview and Highlights
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MySQL 5.5.36 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:

http://dev.mysql.com/downloads/mysql/5.5.html

I was reading through the changelogs to review the changes and fixes, and to summarize, I must say this release is mostly uneventful.

There was one new feature added (for building, so not really applicable to everyone), and only 17 bugs fixed.

The new feature is this:

  • CMake now supports a -DTMPDIR=dir_name option to specify the default tmpdir value. If unspecified, the value defaults to P_tmpdir in . Thanks to …
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MySQL in Oracle Critical Patch Update Advisory January 2014
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Oracle has released the Critical Patch Update (CPU) advisory for January 2014.

The affected MySQL products are:

  • Oracle MySQL Enterprise Monitor, versions 2.3, 3.0 
  • Oracle MySQL Server, versions 5.1, 5.5, 5.6

So this means that you should consider updating MySQL. For MySQL Enterprise the updates should be available on My Oracle Support and for the Community version the new versions are on the …




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On operating system upgrades and a packager’s nightmare
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A fairy tale

Once upon a time I did an operating system upgrade, a minor one that should do no harm, but just get me up to date by fixing any bugs in the version I had been using. It seemed like a good idea.

All seemed to be fine. I use a package provided by an external vendor and not the one produced by the operating system provider as this vendor provides a newer version of the package and I need that. The vendor has to make his package fit in the os environment his package is built for and normally does a pretty good job.

I use automation to build my systems and when I built a new one some issues …

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An incomplete list of what your developers would like to know before migrating to MySQL 5.5
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A few years ago, I asked to check with me in the long (very long) change history of MySQL 5.5 documentation what are the changes in relation to the SQL syntax.
Chris Calender helped me to retrieve a list of the main changes, thanks again Chris.

Today, I would like to share this list with you.
It is simply a curated transcript of what you might find in the documentation but I’m sure it can help some of you.
 

INTO clause in nested SELECT statements

 
Previously, the parser accepted an INTO clause in nested SELECT statements, which is invalid …




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MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark
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MySQL 5.6 vs MySQL 5.5 & the Star Schema Benchmark

So far most of the benchmarks posted about MySQL 5.6 use the sysbench OLTP workload.  I wanted to test a set of queries which, unlike sysbench, utilize joins.  I also wanted an easily reproducible set of data which is more rich than the simple sysbench table.  The Star Schema Benchmark (SSB) seems ideal for this.

I wasn’t going to focus on the performance of individual queries in this post, but instead …

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Showing entries 1 to 10 of 44 10 Older Entries

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