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Showing entries 1 to 10 of 154 10 Older Entries

Displaying posts with tag: monitoring (reset)

MySQL replication monitoring 101
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Replication is the process that transfers data from an active master to a slave server, which reproduces the data stream to achieve, as best as possible, a faithful copy of the data in the master.

To check replication health, you may start with sampling the service, i.e. committing some Sentinel value in the master and retrieving it from the slave.


Sentinel data: Tap tap… Is this thing on?

If you want to make sure that replication is working, the easiest test is using replication itself to see …






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Part 1: How to Effectively Use a Performance Schema
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Performance Schema (PS) has been the subject of many, many recent discussions, presentations, and articles.  After its release in MySQL 5.7, PS has become the main actor for people who want to take the further steps in MySQL monitoring. At the same time, it has become clear that Oracle intends to make PS powerful with so many features and new instrumentation that old-style monitoring will begin to look like obsolete tools from the Stone Age.

This article will explain PS and provide guidance on what needs to be done in order to use it effectively.

What I am not going to do is to dig into specific performance issues or address …

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Analyst for MySQL v1.1: Database Performance, Security, & Best Practices Auditing Tool Released – Download for FREE!
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Itchy Ninja Software is pleased to announce the release of Analyst for MySQL v1.1. Revolutionize the way you work and administrate MySQL, MariaDB, Galera, and Percona XtraDB installations.

Make More Efficient Use of Your Time

Gathering all of the metrics to diagnose a database installation is a very time consuming process, and many simply do not have the experience to know where to begin. With Analyst for MySQL, you will be able to get your hands on hundreds of metrics within moments. It really takes all of the guesswork, as well as tedious long sessions of …

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How to Tell If It’s MySQL Swapping
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On servers that are into the swap file and have multiple processes running, I often wonder if it’s MySQL that is in the swap or some other process.  With Linux this is a fairly easy thing to figure out.  Below is the format of a command to do just that:

echo 0 $(cat /proc/`pidof process`/smaps | grep TYPE | awk '{print $2}' | sed 's#^#+#') | bc

 

In the above command, TYPE refers to what type of Memory you want to examine.  Below are some of the options for this value:

TYPE Explanation
Private Private …
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Operationalizing TokuDB
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In my previous post, I talked about implementing multi-threaded replication (MTR) using Percona Server 5.6. The server pairs that are utilizing MTR are also exclusively using the TokuDB storage engine.

I find TokuDB to be a fascinating engine. I can tell I will need to re-watch our Dbhangops session where Tim Callaghan talked about the differences …

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Monitoring Disk Space
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Some time back, when a client wanted us to setup MySQL Enterprise Monitor, we were surprised to find out that disk monitoring was not available! We worked hard to come up with a solution. Eventually, we decided to setup a custom agent to monitor the disk. Below is the result of that.

While this script may not work as-is for everyone, it should at least provide a basis for such a script. This script has been modified to send an email instead of plug directly into the MySQL Enterprise Monitor. But, it hopefully will get our creative juices flowing…

#!/bin/bash
#
# This script does a very simple test for checking disk space.
#
# Itchy Ninja Software: …
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Chef Cookbooks for ClusterControl - Management and Monitoring for your Database Clusters
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If you are automating your infrastructure deployments with Chef, then read on. We are glad to announce the availability of a Chef cookbook for ClusterControl. This cookbook replaces previous cookbooks we released for ClusterControl and Galera Cluster. For those using Puppet, please have a look at our Puppet module for ClusterControl.

 

ClusterControl Cookbook on Chef Supermarket

The ClusterControl cookbook is available on …

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Galera Cluster for MySQL vs MySQL (NDB) Cluster: A High Level Comparison - Webinar Replay & Slides
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Thanks to everyone who attended and participated in last week’s webinar on 'Galera Cluster for MySQL vs MySQL (NDB) Cluster: A High Level Comparison'. If you missed the sessions or would like to watch the webinar again & browse through the slides, they are now available online.

 

In this webinar, Severalnines VP of Products, Alex Yu, who was part of the team at Ericsson who originally developed the NDB storage engine in 2001, gave an overview of the two clustering architectures and discussed their respective strengths and weaknesses: 

  1. MySQL …
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9 DevOps Tips for Going in Production with Galera Cluster for MySQL - Webinar Replay & Slides
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November 14, 2014 By Severalnines

Thanks to everyone who attended and participated in this week's webinar on '9 DevOps Tips for Going in Production with Galera Cluster for MySQL'. If you missed the sessions or would like to watch the webinar again & browse through the slides, they are now available online.

 

In this webinar, Severalnines CTO Johan Andersson discussed 9 key aspects to consider before taking Galera Cluster for MySQL into production:

  • 101 Sanity Check
  • Operating System
  • Backup Strategies
  • Galera Recovery
  • Query …
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Optimizing MySQL for Zabbix
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This blog post was inspired by my visit at the annual Zabbix Conference in Riga, Latvia this year, where I gave a couple of talks on MySQL and beyond.

It was a two day single-track event with some 200 participants, a number of interesting talks on Zabbix (and related technologies) and really well-organized evening activities. I was amazed how well organized the event …


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Showing entries 1 to 10 of 154 10 Older Entries

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