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Showing entries 1 to 10 of 36076 10 Older Entries
InnoDB flushing and Linux I/O
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Since documentation is not very clear to me on the topic of InnoDB flushing in combination with Linux IO (specifically the write system call), I decided to put together this article in hopes of shedding some light on the matter.

How Linux does I/O

By default, the write() system call returns after all data has been copied from the user space file descriptor into the kernel space buffers. There is no guarantee that data has actually reached the physical storage.

The fsync() call is our friend here. This will …

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OpenCPS: Vietnam's Public Sector goes Open Source
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Thu, 2016-05-05 15:33colin

I'm now in Hanoi, Vietnam, for the launch of OpenCPS. What, might you ask, is OpenCPS? OpenCPS translates to Open Core Public Services, as Vietnam is providing online public services and OpenCPS should sit at its core. Naturally, all of this will be open source, and AGPL licensed. OpenCPS is the first open source project to realize the development of e-government services in Vietnam.

Why does this matter to us? Because at the core of its infrastructure is of course, MariaDB Server as the database of choice, with Red Hat being the Linux provider of choice.

…  [Read more...]
Log Buffer #472: A Carnival of the Vanities for DBAs
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This Log Buffer Edition takes into account blog posts from Oracle, SQL Server and MySQL.

Oracle:

Enterprise Manager Support Files 101- The EMOMS files

From time to time we see a complaint on OTN about the stats history tables being the largest objects in the SYSAUX tablespace and growing very quickly.

Delphix replication and push …

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How to Deal with MetaData Lock
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What is MetaData Lock?

MySQL uses metadata locking to manage concurrent access to database objects, and to ensure data consistency when performing modifications to the schema: DDL operations. Metadata locking applies not just to tables, but also to schemas and stored programs (procedures, functions, triggers, and scheduled events).

In this post I am going to cover metadata locks on tables and triggers, that are usually seen by DBAs during regular operations/maintenance.

Kindly refer to these 4 different connections to MySQL Instance:

 

The screenshot shows that the uncommitted transaction may cause metadata lock …

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Planets9s - Sign up for our ClusterControl New Features Webinar
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Welcome to this week’s Planets9s, covering all the latest resources and technologies we create around automation and management of open source database infrastructures.

Sign up for our ClusterControl New Features Webinar

Join us for this new webinar on Tuesday, May 24th, where we’ll be discussing and demonstrating the latest version of ClusterControl, the one-stop console for your entire database infrastructure. We’ll be introducing some cool new features for MySQL and MongoDB users in particular as well as walk you through the work we’ve recently …

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Announcing Galera Cluster 5.5.49 and 5.6.30 with Galera 3.16
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Codership is pleased to announce the release of Galera Cluster 5.5.49 and 5.6.30 with Galera Replication library 3.16, implementing wsrep API version 25.

The library is now available as targeted packages and package repositories for a number of Linux distributions including RHEL, 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. The source repositories and bug tracking are now on …

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Docker for Mac beta and MySQL - First impressions
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Using Docker for development is a great way of ensuring that what you develop will be the same that you deploy in production. This is true for almost everything. If you develop on Linux, the above statement holds. If you develop on a different operating system (OSX or Windows) there are several restrictions.

I showed one of those issues in a recent article (MySQL and Docker on a Mac: networking oddity.) When you want to export a port from a service running in the container, the …

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How VividCortex Uses the New Generated Virtual Columns Feature in MySQL
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In an industry as fast-growing and interconnected as database technology’s, it’s exciting to track how innovations in one platform can ignite beneficial, rippling effects on other, surrounding systems. At VividCortex we frequently find ourselves faced with opportunities to improve our monitoring solutions based on how database technologies (such as MySQL, Redis, PostgreSQL, etc) develop and integrate new upgrades.

When those platforms that we monitor -- already powerful, tried and true -- equip themselves with new features, we work to discover how VividCortex can leverage those features and make our own …

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MySQL High Availability: The Road Ahead for Percona and XtraDB Cluster
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This blog post discusses what is going on in the MySQL high availability market, and what Percona’s plans are for helping customers with high availability solutions.

One thing I like to tell people is that you shouldn’t view Percona as a “software” company, but as a “solution” company. Our goal has always been to provide the best solution that meets each customer’s situation, rather than push our own software, regardless of whether it is the best …

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Installing Nginx with PHP 7 and MySQL 5.7 (LEMP) on Ubuntu 16.04 LTS
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Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on an Ubuntu 16.04 server with PHP 7 support (through PHP-FPM) and MySQL support (LEMP = Linux + nginx (pronounced "engine x") + MySQL + PHP) .

Showing entries 1 to 10 of 36076 10 Older Entries

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