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Showing entries 1 to 10 of 34982 10 Older Entries
Cached linkbench performance for MySQL 5.7.8, 5.6, WebScale and MyRocks
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This extends previous results for Linkbench to compare performance for a cached database with concurrent clients. My conclusions are:

  • InnoDB compression in the Facebook patch for MySQL 5.6 is much faster for insert-heavy workloads than the same feature in upstream 5.6 and 5.7. Too bad those changes might not reach upstream
  • InnoDB …

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High-load clusters and desynchronized nodes on Percona XtraDB Cluster
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There can be a lot of confusion and lack of planning in Percona XtraDB Clusters in regards to nodes becoming desynchronized for various reasons.  This can happen a few ways:

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MySQL replication in action - Part 5 - parallel appliers
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Previous episodes:

MySQL replication monitoring 101MySQL replication in action - Part 1: GTID & CoMySQL replication in action - Part 2 - Fan-in topologyMySQL replication in action - Part 3 - …  [Read more...]
Unexpected Memory Consumption for Bulk Index Creation in InnoDB (MySQL)
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In my last Booking.com Hackathon, I worked on MyISAM vs InnoDB for data loading (LOAD DATA IN FILE) and bulk index creation.  My motivation was the following: knowing that some are still using MyISAM for this particular use-case, I wanted to verify/understand if/why InnoDB is slower than MyISAM.  I do not yet have complete results on this specific subject but I found some interesting things that

First day with InnoDB transparent page compression
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I ran linkbench overnight for a database that started at 100G using MySQL 5.7.8 and InnoDB transparent page compression. After ~24 hours I have 1 mysqld crash with nothing in the error log. I don't know if that is related to bug 77738. I will attach gdb and hope for another crash. For more about transparent page compression read here, …

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Log Buffer #438: A Carnival of the Vanities for DBAs
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This Log Buffer Edition covers Oracle, MySQL, and SQL Server blog posts from the last week.

Oracle:

Integrating Telstra Public SMS API into Bluemix

Adaptive Query Optimization in Oracle 12c : Ongoing Updates

First flight into the Oracle Mobile …

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Log Buffer #437: A Carnival of the Vanities for DBAs
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This Log Buffer Edition goes out deep into the vistas of database world and brings out few of the good ones published during the week from Oracle, SQL Server, and MySQL.

Oracle:

Overriding Default Context-Sensitive Action Enablement

This is an alternative to if… then… else… elsif… end if when you want to use conditional statements in PL/SQL.

Achieving …

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Percona Toolkit 2.2.15 is now available
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Percona is pleased to announce the availability of Percona Toolkit 2.2.15.  Released August 28, 2015. Percona Toolkit is a collection of advanced command-line tools to perform a variety of MySQL server and system tasks that are too difficult or complex for DBAs to perform manually. Percona Toolkit, like all Percona software, is free and open source.

This release is the current GA (Generally Available) …

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Ubuntu 15.04 LAMP server tutorial with Apache 2, PHP 5 and MariaDB (instead of MySQL)
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LAMP is short for Linux, Apache, MySQL, PHP. This tutorial shows how you can install an Apache 2 webserver on an Ubuntu 15.04 server with PHP 5 support (mod_php) and MySQL / MariaDB. Additionally, I will install PHPMyAdmin to make MySQL administration easier. A LAMP setup is the perfect basis for CMS systems like Joomla, Wordpress or Drupal.

Announcing Galera Cluster 5.5.42 and 5.6.25 with Galera 3.12
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Codership is pleased to announce the release of Galera Cluster 5.5.42 and 5.6.25 with Galera Replication library 3.12, implementing wsrep API version 25.

Galera Cluster is now available as targeted packages and package repositories for a number of Linux distributions, including Ubuntu, Debian, Fedora, CentOS, OpenSUSE and SLES. Obtaining packages using a package repository removes the need to download individual files and facilitates the deployment and upgrade of Galera nodes.

This and future releases will be available from http://www.galeracluster.com, while previous releases remain available on LaunchPad. The …

  [Read more...]
Showing entries 1 to 10 of 34982 10 Older Entries

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