by Julia Vural | Jun 26, 2025 | Insight for DBAs, MySQL, Open Source, Percona Software
At Percona, we’ve always been dedicated to providing robust, open source high availability solutions that meet our users’ evolving needs. Percona XtraDB Cluster (PXC) stands as a testament to this commitment, offering a highly available and scalable solution for...
by Yoann La Cancellera | Mar 28, 2024 | Insight for DBAs, Insight for Developers, MySQL
Any Galera documentation about limitations will state that tables must have primary keys. They state that DELETEs are unsupported and other DMLs could have unwanted side-effects such as inconsistent ordering: rows can appear in different order on different nodes in...
by Yoann La Cancellera | Jun 28, 2023 | Insight for DBAs, MySQL, Percona Software
Recently, I was working on a very unfortunate case that revolved around diverging clusters, data loss, missing important log errors, and forcing commands on Percona XtraDB Cluster (PXC). Even though PXC tries its best to explain what happens in the error log, I can...
by Marco Tusa | Dec 9, 2021 | Insight for DBAs, MySQL, Percona Software
Percona XtraDB Cluster 8.0.25 (PXC) has introduced a new option to perform online schema modifications: NBO (Non-Blocking Operation). When using PXC, the cluster relies on the wsrep_OSU_method parameter to define the Online Schema Upgrade (OSU) method the node uses to...
by Marco Tusa | May 4, 2021 | Insight for DBAs, MySQL, Percona Software
AKA Cluster Error Voting… What is Cluster Error Voting (CEV)? “Cluster Error Voting is a new feature implemented by Alexey Yurchenko, and it is a protocol for nodes to decide how the cluster will react to problems in replication. When one or several nodes have...
by David Busby | Oct 30, 2020 | Insight for DBAs, MySQL, Percona Software
Galera replication technology, a key component of Percona XtraDB Cluster, suffered from a remote code execution vulnerability. Percona has been working with the vendor since early September on this issue and has made releases available to address the problem....
by Sri Sakthivel | Oct 6, 2020 | MySQL, Open Source, Percona Software
Schema changes are the big challenges in Galera replication. So, it is recommended to understand the schema changes operation for everyone who uses the Percona XtraDB Cluster (PXB)/Galera clusters. In this blog, I am going to explain the operation and impact of the...
by Sveta Smirnova | Jul 28, 2020 | MySQL, Percona Software
I got this question on the “How to Avoid Pitfalls in Schema Upgrade with Percona XtraDB Cluster (PXC)” webinar and wanted to answer it in a separate post. Will RSU have an effect on GTID consistency if replication PXC cluster to another cluster? Answer for...
by Borys Belinsky | Mar 19, 2020 | Cloud, Insight for DBAs, MySQL, Percona Software
Percona is happy to announce the experimental release of Percona XtraDB Cluster 8.0. This is a major step for tuning Percona XtraDB Cluster to be more cloud- and user-friendly. This is the second experimental release that combines the updated and feature-rich Galera...
by Kenn Takara | Oct 3, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
The problem In PXC 5.6 and 5.7, when using xtrabackup-v2 as the SST method, the DBA must create a user with the appropriate privileges for use by Percona XtraBackup (PXB). The username and password of this backup user are specified in the wsrep_sst_auth variable. This...
by Borys Belinsky | Oct 1, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is happy to announce the first experimental binary of Percona XtraDB Cluster 8.0 on October 1, 2019. This is a major step for tuning Percona XtraDB Cluster to be more cloud- and user-friendly. This release combines the updated and feature-rich Galera 4, with...
by Borys Belinsky | Sep 18, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is happy to announce the release of Percona XtraDB Cluster 5.7.27-31.39 on September 18, 2019. Binaries are available from the downloads section or from our software repositories. Percona XtraDB Cluster 5.7.27-31.39 is now the current release, based on the...
by Borys Belinsky | Sep 17, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.6.45-28.36 on September 17, 2019. Binaries are available from the downloads section or from our software repositories. Percona XtraDB Cluster 5.6.45-28.36 is now the current release, based on the...
by Borys Belinsky | Jun 26, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.7.26-31.37 on June 26, 2019. Binaries are available from the downloads section or from our software repositories. Percona XtraDB Cluster 5.7.26-31.37 is now the current release, based on the...
by Borys Belinsky | Jun 19, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.6.44-28.34 on June 19, 2019. Binaries are available from the downloads section or from our software repositories. Percona XtraDB Cluster 5.6.44-28.34 is now the current release, based on the...
by Przemysław Malkowski | Mar 25, 2019 | Insight for DBAs, MySQL, Percona Software
If you are using Galera replication, you know that schema changes may be a serious problem. With its current implementation, there is no way even a simple ALTER will be unobtrusive for live production traffic. It is a fact that with the default TOI alter method,...
by Borys Belinsky | Feb 28, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.6.43-28.32 on February 28, 2019. Binaries are available from the downloads section or from our software repositories. This release of Percona XtraDB Cluster includes the support of Ubuntu 18.10...
by Borys Belinsky | Feb 28, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.7.25-31.35 on February 28, 2018. Binaries are available from the downloads section or from our software repositories. This release of Percona XtraDB Cluster includes the support of Ubuntu 18.10...
by Dmitriy Kostiuk | Jan 4, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona announces the release of Percona XtraDB Cluster 5.6.42-28.30 (PXC) on January 4, 2019. Binaries are available from the downloads section or our software repositories. Percona XtraDB Cluster 5.6.42-28.30 is now the current release, based on the following:...
by Dmitriy Kostiuk | Jan 4, 2019 | Insight for DBAs, MySQL, Percona Software, ProxySQL
Percona is glad to announce the release of Percona XtraDB Cluster 5.7.24-31.33 (PXC) on January 4, 2019. Binaries are available from the downloads section or from our software repositories. Percona XtraDB Cluster 5.7.24-31.33 is now the current release, based on the...
