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Showing entries 1 to 10 of 196 10 Older Entries

Displaying posts with tag: MySQL 5.6 (reset)

MaxScale Binlog Server HOWTO: Install and Configure
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MaxScale 1.1.0 is out and includes the new Binlog Server module.  This is the first post in s series of three.  The two others are about Operations and High Availability.  The links to the 2 other posts are at the end of this page.

In this post, I present how to install and configure MaxScale as a Binlog Server using the Binlog Router plugin.

This post assumes that you already have the replication topology …



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MaxScale Binlog Server HOWTO: POC for Master Promotion without Touching any Slave
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Note: DO NOT use this procedure in production, this is a proof of concept (POC).  MaxScale 1.1.0 does not yet fully support that procedure and things could go wrong in some situations (see at the end of the post for the details).

In my talk at PLMCE 2015, I presented an architecture to promote a …

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MaxScale Binlog Server HOWTO: Operations (including Chaining)
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In the Install and Configure HOWTO, we learned how to install and configure a MaxScale Binlog Server.  In this HOWTO, I will present the common operations that you might need to perform when using this software.  Those operations include:

  • Purging Binary Logs,
  • Chaining Binlog Servers,
  • Saving Binary Log Files in the Non-Default Directory,
  • Downloading Binary Logs other than First,
  • Listing Connected Slaves,
  • Disconnecting one or all …

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Fun with Bugs #35 - Bugs fixed in MySQL 5.6.24
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I had not reviewed bug fixes in MySQL 5.6 for quite a some time, so I decided to check what bugs reported by MySQL Community were fixed in recently released MySQL 5.6.24. I'll mention both a bug reporter and engineer who verified the bug in the list below, because I still think that in MySQL world names should matter.

So, MySQL 5.6.24 includes fixes for the following bugs from …

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Follow up on MySQL 5.6 GTIDs: Evaluation and Online Migration
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One year ago, I blogged about Evaluation and Online Migration of MySQL 5.6 GTIDs.  At that time, we setup the following test environment where:

  • A is a production master with GTIDs disabled,
  • D to Z are standard slaves with GTIDs disabled,
  • B is an intermediate master running my recompiled version of MySQL implementing the ANONYMOUS_IN-GTID_OUT mode (see the details my previous …


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MySQL 5.6.23 Overview and Highlights
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MySQL 5.6.23 was recently released (it is the latest MySQL 5.6, is GA), and is available for download here.

For this release, there is 1 “Security Note”, 3 “Functionality Changed”, and 5 “Compilation Notes”, all benign, but let me address them:

  1. Security Note: The linked OpenSSL library for the MySQL Commercial Server has been updated from version 1.0.1j to version 1.0.1k. Issues fixed in the new version are described at …
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MySQL 5.6.22 Overview and Highlights
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MySQL 5.6.22 was recently released (it is the latest MySQL 5.6, is GA), and is available for download here.

For this release, there is 1 “Security Note”, 2 “Functionality Changed”, and 5 “Compilation Notes”, all benign, but let me address them:

  1. Security Note: The linked OpenSSL library for the MySQL Commercial Server has been updated from version 1.0.1h to version 1.0.1j. Issues fixed in the new version are described at …
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Using a CRL with MySQL
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So assume you just uploaded the certificate you use to identify yourself to the MySQL server to Github or some other place it doesn't belong...and there is no undelete.

First: Don't panic.
Often a password is required besides a certificate to connect to the server. So someone with the certificate can't use it without the password. The certificate itself might be protected by a password, but that's really rare. Also access to MySQL and/or your account should be limited to certain IP's.






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An easy way to describe MySQL's Binary Log Group Commit
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It struck me today; there is an easy way to describe MySQL's Binary Log group commit improvements from MySQL 5.0-5.7 by using the example of a single ferry trying to ship passengers from point A to point B:

MySQL 5.0 Behaviour

In MySQL 5.0, the ferry will pick up the next passenger in line from point A, and transfer them to point B. The trip between A and B takes about 10 minutes return trip, so it's possible that several new passengers will arrive while the ferry is in transit. That doesn't matter; when the ferry …

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InnoDB crash recovery speed in MySQL 5.6
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It has been a while since I have looked at InnoDB crash recovery. A lot has change in the last few years – we have serious crash recovery performance improvements in MySQL 5.5 and MySQL 5.6, we have solid state drives raising as typical high performance IO subsystem and we also have the ability to set much larger log files and often have a much larger InnoDB Buffer Pool to work with.

First let me revisit the challenge with have with InnoDB configuration. For write-intensive workloads it is extremely important to size innodb_log_file_size for good performance, however the longer log file size you have the longer …

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Showing entries 1 to 10 of 196 10 Older Entries

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