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Displaying posts with tag: skysql (reset)
Troubleshooting High Memory Usage with MySQL on Windows

I was testing out the latest MySQL 5.6 on Windows (having used the auto-installer) and happened to notice my RAM usage (via Windows Task Manager) was reporting quite a high value, when I had very modest ram/buffer settings (should have been around 40M, but instead it was around 400M).

After double/triple-checking my settings to make sure I didn’t overlook something obvious, I searched the bugs database, and ran across bug #68287:

“High Memory Usage with MySQL 5.6.12 GA in ‘Development Machine’ mode”

Turns out, using the auto-installer set the value of table_definition_cache=1400, when the minimum value is 400. Reducing it to 400, and restarting MySQL immediately lowered the RAM usage, and is the “work-around” identified in the bug report.

Having encountered this, …

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How to Build MySQL 5.7 on Windows from Source Code

I just installed 5.7.1 on Windows and next up was to build it from source on Windows, so that’s what I did, and thought I’d share the steps.

** Prerequisites **

1. Install Microsoft Visual Studio (I installed VS 2010 Express – free)
2. Install cmake
3. Install bison (make sure no spaces in path)

** Build Instructions **

cd c:\mysql\mysql-5.7.1
mkdir bld
cd bld
cmake ..
cmake --build . --config relwithdebinfo --target package

And here is the full output for anyone who might be interested:

C:\Windows\system32>cd C:\mysql\mysql-5.7.1

C:\mysql\mysql-5.7.1>mkdir bld

C:\mysql\mysql-5.7.1>cd bld

C:\mysql\mysql-5.7.1\bld>cmake ..
-- Building for: Visual Studio 10
-- Running cmake version
-- Configuring with MAX_INDEXES = 64U
-- The C compiler identification is MSVC 16.0.30319.1
-- The CXX compiler …
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Troubleshooting Building MariaDB 5.1 on Windows

This is a follow-up, troubleshooting article that goes hand-in-hand with my “Building MariaDB 5.1 on Windows Revisited” post, and covers some problems and their solutions that one might encounter when attempting to build MariaDB from source code on Microsoft Windows.

The first error I ran into was this, on my main compile step (i.e., the 2nd cmake command):

C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.Cpp
Common.targets(151,5): error MSB6006: "cmd.exe" exited with code 1.

That in itself doesn’t tell us too much. Searching the full compile output, we find:

Generating ../../scripts/mysql_fix_privilege_tables.sql
The system cannot find the file specified.
C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.Cpp
Common.targets(151,5): error MSB6006: "cmd.exe" exited with …
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Building MariaDB 5.1 on Windows Revisited

I previously wrote an article on Building MariaDB 5.1 on Windows, but it was about 1.5 years ago (for 5.1.60; this is for 5.1.67), so I wanted to update this a little since I’ve built it entirely from the command-line this time (as well as highlight a couple problems/solutions – which I’ll cover in a subsequent troubleshooting post). This process it quite similar to my steps for building MariaDB 5.5 and MariaDB 10.0, however it’s slightly different since 5.1 requires you run the configure.js script before running cmake. Aside from that though, things are mostly the same.

Here is the full procedure:

Download 5.1.67 MariaDB source and extract to C:\mysql\mariadb-5.1.67
cd C:\mysql\mariadb-5.1.67
cmake .
cmake …
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Installing MySQL 5.7.1 (Milestone Release) on Windows 7

I wanted install MySQL 5.7.1 (1st Milestone Release) on Windows 7 and test it out a bit, so I did, and since things didn’t go as smooth as expected, I thought I’d share my experience, in case anyone else runs into the same issues.

I downloaded the .msi (mysql-5.7.1-m11-winx64.msi) from (then click the “Developmental Releases” tab) and installed it following the prompts. That seemed to complete fine, which was great. However, that was it – and not in a good way. I mean, the “installer” basically only unpacked the files to a location.

I was expecting the “configuration” tool to run, but it didn’t. It was not installed, and not an option.

I quickly read through the 5.7.1 changelog and found the config tool is not part of the .msi anymore. You must now use the “MySQL Installer” if you want to …

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David Axmark & Monty Widenius will be Berliners on June 18th - SkySQL & MariaDB Roadshow

Join us at the next MySQL & Cloud Database Solutions Day hosted by SkySQL & MariaDB in Berlin on June 18th

It’s a beautiful day in Berlin today and we’re putting the final touches to next week’s MySQL & Cloud Database Solutions Day, which takes place on Tuesday June 18th in the facilities provided by Bitkom in Berlin Mitte.

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High Availability for Drupal Part 2 - The Contenders

When looking at high availability for any CMS, and particularly for Drupal, the list of contenders for part or all of the solution is growing and can be daunting. We'll take a look at the various parts of a solution and what options we have.

Go Cloud?

It seems nearly every answer to every problem in IT these days is "The Cloud", but is it?

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Immediate thoughts on Business Source Licensing

I just got back from a vacation to see articles about Business Source Licensing. I’ve divided my thoughts into four parts here: Opensource and its merits, Is unpaid opensource usage bad?, MariaDB’s “Problem”, Business Source Licensing. If you haven’t read them yet, here’s some mandatory reading:

  1. Open source: Its true cost and where it’s going awry by Monty Widenius
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High Availability for Drupal Part 1 - Investigating the Issues

Drupal is one of the most popular Content Management Systems (CMS) and is used increasingly in high-visibility sites, such as This has brought a lot of attention on how to get the most performance out of Drupal and how to improve the availability of such sites. In this blog series I'll take you through the basics and on through to designing your own HA Drupal site.

But first, we need to understand what the challenges are in getting Drupal (or indeed any CMS) working on multiple servers in such a way as to ensure high availability and performance.

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Open Source, the MySQL market (and TokuDB in particular)

I was reviewing the Percona Live sponsors list the other day and pondering the potential success stories associated with this product or that one…. and as I was preparing to put more thought on the topic, a PlanetMySQL post caught my eye. It was penned by Mike Hogan and titled, “Thoughts on Xeround and Free!

For some reason the author of that post makes a connection between a free account in a cloud-based service and Open Source software. I think it’s an incorrect analogy, as they are two totally different things. A “free account” in this case is really just a marketing tool. Well, I admit there are companies that also use the “Open …

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