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Displaying posts with tag: ubuntu (reset)
Importance of MySQL cache

My test environment is:
Ubuntu 14.04 Trusty Tahr
MySQL Server version: 5.5.44-0ubuntu0.14.04.1 (Ubuntu)

MySQL uses sql cache to store results of queries that have been executed so that when the same query is executed again it retrieves the result data set from the cache instead of getting it again from db. So it is faster data access.

It is by default enabled in MySQL.

This is interesting since there is one question we ought to ask here whether we should use it or disable it or just leave it as it is who cares :).

Ok, moving forward today's session goals are:

  1.     How useful is MySQL cache?
  2.     When to use it and when not to use it?
  3.     What to do if you do not want to use it?


There are some catchy areas here too like not all your queries will be stored in cache. …

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9 easy performance tips for your Linux environment

For the majority of us who have grown accustomed to a Windows environment over the years, Linux can seem like another world. In essence, Linux is a free open-source operating system that has gained increasing popularity since its release in 1991. Linux is based on the whole Unix ecosystem of operating systems that grew out of Bell Laboratories in the early 1970s. Linux has been around for almost 25 years and grew immensely in the late 1990s and early 2000s when it became associated with the LAMP web development stack; Linux stands for the ‘L’ in the acronym of popular tools, along with Apache, MySQL, and PHP/Perl/Python.

 

 

 

 

The main difference that …

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The Perfect Server - Ubuntu 15.04 (Vivid Vervet) with Apache, PHP, MySQL, PureFTPD, BIND, Postfix, Dovecot and ISPConfig 3

This tutorial shows how to install an Ubuntu 15.04 (Vivid Vervet) server (with Apache2, BIND, Dovecot) for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache or nginx web server, Postfix mail server, Courier or Dovecot IMAP/POP3 server, MySQL, BIND or MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more. This setup covers the installation of Apache (instead of nginx), BIND (instead of MyDNS), and Dovecot (instead of Courier).

Yelp IT! A talk with 3 Yelp MySQL DBAs on Percona Live & more

Founded in 2004 to help people find great local businesses, Yelp has some 135 million monthly unique visitors. With those traffic volumes Yelp’s 300+ engineers are constantly working to keep things moving smoothly – and when you move that fast you learn many things.

Fortunately for the global MySQL community, three Yelp DBAs will be sharing what they’ve learned at the annual Percona Live MySQL Conference and Expo this April 13-16 in Santa Clara, California.

Say “hello” to Susanne Lehmann, Jenni Snyder and Josh Snyder! I chatted with them over email about their presentations, on how MySQL is used at Yelp, and about the shortage of women in MySQL.

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Tom: Jenni, you and Josh will be co-presenting “ …

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How to setup a LAMP development environment in Vagrant

In the previous tutorial, we have learned about the basics of Vagrant. In this tutorial, we will move to next level and will learn more about Vagrant and setting up LAMP development environment in Vagrant. To start with, LAMP stands for: Linux (OS/Kernel), Apache (Web Server), MySQL (Database), PHP (Scripting Language). It is an open-source Web development environment which lets you create web applications. It is generally also referred as Web Stack.

Looking deeper into InnoDB’s problem with many row versions

A few days ago I wrote about MySQL performance implications of InnoDB isolation modes and I touched briefly upon the bizarre performance regression I found with InnoDB handling a large amount of versions for a single row. Today I wanted to look a bit deeper into the problem, which I also filed as a bug.

First I validated in which conditions the problem happens. It seems to happen only in REPEATABLE-READ isolation mode and only in case there is some hot rows which get many row versions during a benchmark run. For example the problem does NOT happen if I run sysbench with “uniform” distribution.

In terms of concurrent selects it also seems to require some very special conditions – you need to have the connection to let some …

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MySQL Debian/Ubuntu packaging sprint

Debian/Ubuntu packaging sprint participants. From left: James Page, Norvald H. Ryeng, George Lorch, Akhil Mohan, Otto Kekäläinen, Robie Basak.

Last week, Canonical invited the MySQL packaging team in Debian to a packaging sprint in their London office, and most of us were able to participate. We’ve met online on IRC and UOSs before, but this was the first time we were all in the same room.

The results of our sprint will soon be available in a .deb near you. Since Debian Jessie is currently in feature freeze, most of it will hit Ubuntu first. The two main things we achieved on the MySQL side were to make MySQL 5.6 ready for Ubuntu Vivid (15.04) and to split MySQL, Percona and MariaDB configuration files. The configuration file split …

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How to install osCommerce on Ubuntu 14.04 (Trusty Tahr)

How to install osCommerce on Ubuntu 14.04 (Trusty Tahr)

This document describes how to install osCommerce in Ubuntu 14.04. Open Source Commerce (osCommerce) is a popular e-Commerce and online store-management software program that may be easily used on any web server with PHP and MySQL installed. osCommerce is available to users as a free software under the General Public License (GNU) The versatile and fuss-free software enables easy setting up and maintenance of e-stores using minimal effort. This tutorial describes the process of installing osCommerce on Ubuntu 14.04.

How to install osCommerce on Ubuntu 14.04 (Trusty Tahr)

How to install osCommerce on Ubuntu 14.04 (Trusty Tahr) This document describes how to install osCommerce in Ubuntu 14.04. Open Source Commerce (osCommerce) is a popular e-Commerce and online store-management software program that may be easily used on any web server with PHP and MySQL installed. osCommerce is available to users as a free software under the General Public License (GNU) The versatile and fuss-free software enables easy setting up and maintenance of e-stores using minimal effort. This tutorial describes the process of installing osCommerce on Ubuntu 14.04.

How to install osCommerce on Ubuntu 14.04 (Trusty Tahr)

How to install osCommerce on Ubuntu 14.04 (Trusty Tahr) This document describes how to install osCommerce in Ubuntu 14.04. Open Source Commerce (osCommerce) is a popular e-Commerce and online store-management software program that may be easily used on any web server with PHP and MySQL installed. osCommerce is available to users as a free software under the General Public License (GNU) The versatile and fuss-free software enables easy setting up and maintenance of e-stores using minimal effort. This tutorial describes the process of installing osCommerce on Ubuntu 14.04.

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