GTID-based replication makes managing replication topology easy: just CHANGE MASTER to any node and voilà. It doesn’t always work, but for the most part it does. That’s great, but it can hide a serious problem: missing writes. Even when MySQL GTID-based replication says, “OK, sure!”, which is most of the time, you should double check it.

GTID-based replication makes managing replication topology easy: just CHANGE MASTER to any node and voilà. It doesn’t always work, but for the most part it does. That’s great, but it can hide a serious problem: missing writes. Even when MySQL GTID-based replication says, “OK, sure!”, which is most of the time, you should double check it.

Today’s article is again related to WordPress and MySQL 8.0. We will see how we can setup MySQL InnoDB ReplicaSet and configure WordPress to split the load using both MySQL Instances: we will split reads and writes between the Primary and the Secondary member of our ReplicaSet.

This will be the first part of our journey to achieve HA for our WordPress site on OCI and using all MySQL Servers we have deployed. We don’t want to have a server idle just waiting to take over in case of an incident.

MySQL InnoDB ReplicaSet

First some words about MySQL InnoDB ReplicaSet.

The ease of use of …

In the penultimate Deno article, I wrote on how to build REST APIs with Deno and Oak. In that tutorial, we used an array as a dummy storage placeholder to not overwhelm ourselves with database connection and other stuff. For this article, we are going to take that example one …

The post Using MySQL with Deno appeared first on Geeky Hacker.

Join Peter Zaitsev, CEO at Percona, as he discusses eBFT. eBPF is one of the most powerful instrumentation frameworks in modern Linux Kernel. In this presentation, we will cover eBPF basics as well as usage of Interactive eBPF tools, showing practical examples when and how they can help to resolve performance problems. Finally, we will look into Cloudflare’s ebpf_exporter and show how you can integrate eBPF with Prometheus for Long Term Monitoring.

Please join Peter Zaitsev, CEO at Percona, on Wednesday, June 10 at 11 am EDT for his webinar “Using eBPF for Linux Performance Analyses”.

Watch the Recording

If you can’t attend, sign up anyway and we’ll …

We’ve created a new space on our website for our flagship product Tungsten Clustering. This blog invites you to take a tour of the new product section and to get in touch with us for your MySQL MySQL High Availability, Disaster Recovery and/or Geo-Clustering needs.

Tags:  MySQL mysql clustering tungsten clustering High Availability Disaster Recovery geo-clustering

Long months of the pandemic lockdown have brought to life many great online events enabling the MySQL community to get together and stay informed about the very recent developments and innovations available to MySQL users. It isn’t over yet! Next Thursday, June 4th, Percona & ProxySQL are co-hosting the ProxySQL Tech Talks with Percona virtual meetup covering ProxySQL, MySQL and Percona XtraDB Cluster.

The attendees are invited to participate in the two-hour deep-dive event with plenty of time for questions and answers (we will have two 40-minute sessions + 20 minutes allocated for Q&A). Get prepared, come with your burning questions and true war stories – we’ll have our speakers answer and comment on them! And here come the speakers:

• René Cannaò, ProxySQL author and CEO of ProxySQL …

Here in Percona’s Training department, we like to think that we instruct our learners on the best practices for all things MySQL-related. In addition to performance tuning, query optimization, and replication configurations, another important topic is backups. Let’s dive in and discuss some of the basics and best practices around backups for MySQL.

Logical MySQL Backups

In MySQL, it is possible to take backups in two different forms. The first form, logical, is the most universal. Essentially, you create all of the necessary INSERT statements to repopulate your table data. The two most popular tools in the area are mysqldump and mydumper.

mysqldump

This tool has been around since the beginning and supports a slew of different options, too numerous to discuss in this post.

Here is a simple example for taking a logical backup of the …

Managing global counters in a multi-threaded system has always been challenging. They pose serious scalability challenges. Introduction of NUMA just increased the complexity. Fortunately multiple options have been discovered with hardware lending support to help solve/ease some of these issues. In this blog we will go over how we can make Global Counter NUMA SMART and also see what performance impact each of this approach has.

Note: a lot of this work is inspired from MySQL codebase that is continuously trying to evolve to solve this issue.

Global Counters

Most of the software (for example: database, web-server, etc…) needs to maintain some global counters. Being global, there is one copy of these counters and multiple worker threads try to update it. Of-course this invites a need of coordination while updating these copies and in turn it becomes scalability hotspots.

Alternative is to loosely maintain these …

Join Alkin Tezusal, Percona Technical Expert, as he covers the past, present, and future of MySQL as an Open Source Database. During this webinar he will discuss: * Use cases of MySQL as well as edge cases of MySQL topologies using real-life examples and “war” stories * How scalability and proxy wars make MySQL topologies more robust to serve webscale shops * Open-source tools, utilities, and surrounding MySQL Ecosystem

Please join Alkin Tezusal of Percona, on Thursday, June 4 at 10 am EDT for his webinar “MySQL Ecosystem in 2020”.

Watch the Recording

If you can’t attend, sign up anyway and we’ll send you the slides and recording afterward.