Archive

Articles taggués ‘benchmark’

PHP MySQL Benchmark Tool (PMBT v. 0.2)

23/06/2023 Comments off

Source: Reasons Unbeknownst

The old saying “Need is the father of innovation” (or something like that) held true this weekend. I was looking for an easy way to benchmark MySQL for some RAM drive InnoDB experimentation but couldn’t find anything cross platform, user friendly, and created after 2005. So I built an early version of what I was looking for.

This is a very synthetic benchmark for now. In some instances InnoDB is much faster than MyISAM (simultaneous reads/writes) but that doesn’t come across in these results. I’m planning on beefing up the benchmark options in later versions. This tool is currently useful in benchmarking hard drive / RAID performance when using InnoDB. It’s also good for basic my.cnf tweaking. Lire la suite…

Categories: Bases de données, Logiciel Tags: , , , ,

MySQL – Optimisation

04/06/2023 Comments off

L’optimisation au niveau de MySQL passe par trois composants, à savoir :

  • Optimisation du serveur MySQL
  • Optimisation de la base de données
  • Optimisation des requêtes Lire la suite…
Categories: Bases de données Tags: , , , ,

How To Use Apache JMeter To Perform Load Testing on a Web Server

03/05/2023 Comments off

Introduction

In this tutorial, we will go over how to use Apache JMeter to perform basic load and stress testing on your web application environment. We will show you how to use the graphical user interface to build a test plan and to run tests against a web server.

JMeter is an open source desktop Java application that is designed to load test and measure performance. It can be used to simulate loads of various scenarios and output performance data in several ways, including CSV and XML files, and graphs. Because it is 100% Java, it is available on every OS that supports Java 6 or later.

 

Prerequisites

In order to follow this tutorial, you will need to have a computer that you can run JMeter on, and a web server to load test against. Do not run these tests against your production servers unless you know they can handle the load, or you may negatively impact your server’s performance.

You may adapt the tests in this tutorial to any of your own web applications. The web server that we are testing against as an example is a 1 CPU / 512 MB VPS running WordPress on a LEMP Stack, in the NYC2 DigitalOcean Datacenter. The JMeter computer is running in the DigitalOcean office in NYC (which is related to the latency of our tests).

Please note that the JMeter test results can be skewed by a variety of factors, including the system resources (CPU and RAM) available to JMeter and the network between JMeter and the web server being tested. The size of the load that JMeter can generate without skewing the results can be increased by running the tests in the non-graphical mode or by distributing the load generation to multiple JMeter servers.  Lire la suite…

Categories: Logiciel, Réseau, Système Tags: , , , ,

How To Measure MySQL Query Performance with mysqlslap

30/04/2023 Comments off

Source: digitalocean

Introduction

MySQL comes with a handy little diagnostic tool called mysqlslap that’s been around since version 5.1.4. It’s a benchmarking tool that can help DBAs and developers load test their database servers.

mysqlslap can emulate a large number of client connections hitting the database server at the same time. The load testing parameters are fully configurable and the results from different test runs can be used to fine-tune database design or hardware resources.

In this tutorial we will learn how to use mysqlslap to load test a MySQL database with some basic queries and see how benchmarking can help us fine-tune those queries. After some basic demonstrations, we will run through a fairly realistic test scenario where we create a copy of an existing database for testing, glean queries from a log, and run the test from a script.

The commands, packages, and files shown in this tutorial were tested on CentOS 7. The concepts remain the same for other distributions. Lire la suite…

Categories: Bases de données Tags: , , , ,

How do I… Stress test MySQL with mysqlslap?

29/04/2023 Comments off

One of the interesting new tools in MySQL 5.1.4 is mysqlslap, a load emulator that lets you see how well a particular query set or table engine performs under high-load conditions.

A query that consumes too many database resources may be the result of designing tables incorrectly, choosing the wrong table type, or creating an inefficient query. When a query eats up a lot of database resources, it can negatively affect other application components. By using mysqlslap to stress test a server in a non-public environment, you will discover these errors sooner, allowing you to you avoid a database meltdown once your application goes live.

This tutorial shows how you can use mysqlslap to run stress tests involving multiple clients, custom queries, different table engines, and much more. Lire la suite…

Categories: Bases de données Tags: , , , ,