Very often MySQL is much less stable than we realize. In this video I explain how to detect and dianose these MySQL stalls that last for 5-10 seconds or more.

The reason nobody knows about these issues is that they’re:
a) rare
b) intermittent
c) monitoring software can’t catch them

You can use pt-stalk to detect and diagnose such issues. All of the tools I have mentioned in this video are part of Percona Toolkit (no wonder they all start with PT), you can find the toolkit here:

Percona Toolkit

Here’s the main commands I have discussed in this video:

Starting pt-stalk in foreground

# pt-stalk

Starting pt-stalk in background with email notification:

# pt-stalk …

When your car doesn’t start, you don’t just blindly change the battery, starter, fuel pump, spark plugs or all of the above. Instead, you go to your mechanic and ask him to check what is wrong (or you check it yourself if you are the mechanic) and then fix whatever is broken.

Yet very often I see DBAs doing exactly the opposite with their MySQL servers. Rather than assessing what is the server so busy with, they keep changing configuration options until the problem “goes away”. Alternatively, they add more RAM, more CPUs or faster disks, depending on which resources seems to be the most busy at a time. Or they switch to a new server altogether.

MySQL (with a help of some tools) has a really convenient way to analyse the workload and see clearly what exactly is MySQL so busy doing. And even how much improvement you can expect by, say, fixing a specific MySQL query.

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Thank you for attending my 22nd July 2016 webinar titled “Top Most Overlooked MySQL Performance Optimizations“. In this blog, I will provide answers to the Q & A for that webinar.

For hardware, which disk raid level do you suggest? Is raid5 suggested performance-wise and data-integrity-wise?
RAID 5 comes with high overhead, as each write turns into a sequence of four physical I/O operations, two reads and two writes. We know that RAID 5s have some write penalty, and it could affect the performance on spindle disks. In most cases, we advise using alternative RAID levels. Use RAID 5 when disk capacity is more important than performance (e.g., archive databases that …

Are you looking to improve your MySQL performance? Application success is often limited by poor MySQL performance. Please join Percona CEO and Founder Peter Zaitsev for this exclusive webinar on Wednesday, July 20th, 2016 at 11:00 AM PDT (UTC – 7) as he presents “Practical MySQL Performance Optimization“.

Peter Zaitsev discusses how to get excellent MySQL performance while being practical. In other words, spending time on what gives you the best return. The webinar updates Peter’s ever-popular Practical MySQL Performance Optimization presentation. It covers the important points for improving MySQL performance. It also includes a discussion of the new tools and features in the latest MySQL 5.7 …

Proper MySQL Query Optimization starts with a proper Slow Query Logging session. And MySQL Query Optimization is where I spend 70-80% of my time when doing MySQL performance optimization.

In part 2 here, we will go over the pt-query-digest report, that we have prepared in part 1.

Here’s links to the other two parts:

• Advanced MySQL Slow Query Logging Part 1: the essentials
• Advanced MySQL Slow Query Logging Part 3: fine-tuning the logging process

The post Advanced MySQL Slow Query Logging Part 2: …

Proper MySQL Query Optimization starts with a proper Slow Query Logging session. And MySQL Query Optimization is where I spend 70-80% of my time when doing MySQL performance optimization. In this short series I will show you how to do Slow Query Logging the right way.

Here’s links to the other two parts:

• Advanced MySQL Slow Query Logging Part 2: pt-query-digest report
• Advanced MySQL Slow Query Logging Part 3: fine-tuning the logging process

The post Advanced MySQL Slow Query Logging appeared first on Speedemy.

Last week, 21-23 September, it took place the European MySQL Conference, or “Data performance Conference” as this year’s subtitle was “MySQL. NoSQL. Data in the cloud.”. This year, it changed its location from London to Amsterdam and, as most people I talked to agreed, the change was for good. As every year, Percona was the company organizing it, but it had the participation of all the major players in the open source MySQL/MongoDB/Cloud data world. Special mention goes to Booking.com, which had more …

Users are complaining about slowness in your system, MySQL load is always high… The more your database has access, the more it may get slow or worse: slowness even if it is running with low load. You are starting to get desperate! The consequences of slowness and high load are disastrous: If your site is slow,... Read More

The post MySQL Performance and Tuning Best Practices appeared first on Devops for Dummies.

If you install a MySQL Database Server with the default options, your data are insecure and your server is in risk of invasion and some performance issues will appear shortly. With some best practices, your MySQL database becomes secure and the performance goes well. 1 – Set root password and change its login name As... Read More

The post MySQL Security Best Practices appeared first on Devops for Dummies.

When I came from Linux world to Mac OS, I’ve got frustrated in not having a package management system as there are in Ubuntu (with Apt-get) or in CentOS ( YUM ). The world was so fantastic, if I need to install MySQL Database on Ubuntu, I’d just type: $ sudo apt-get install mysql-server On Mac, the […]