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TOI wsrep_RSU_method in PXC 5.6.24 and up

 | July 6, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

I noticed that in the latest release of Percona XtraDB Cluster (PXC), the behavior of wsrep_OSU_method changed somewhat.  Prior to this release, the variable was GLOBAL only, meaning to use it you would:

This had the (possibly negative) side-effect that ALL DDL’s issued on this node would be affected by the setting while in […]

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Playing with Percona XtraDB Cluster in Docker

 | June 30, 2015 |  Posted In: Docker, High-availability, MySQL, Percona XtraDB Cluster, Quality Assurance, XtraDB Cluster

Like any good, thus lazy, engineer I don’t like to start things manually. Creating directories, configuration files, specify paths, ports via command line is too boring. I wrote already how I survive in case when I need to start MySQL server (here). There is also the MySQL Sandbox which can be used for the same […]

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Q&A: High availability when using MySQL in the cloud

 | June 19, 2015 |  Posted In: Cloud and MySQL, MySQL, Percona XtraDB Cluster, Technical Webinars

Last week I hosted a webinar on using MySQL in the cloud for High Availability (HA) alongside 451 Research analyst Jason Stamper. You can watch the recording and also download the slides (free) here. Just click the “Register” button at the end of that page. We had several excellent questions and we didn’t have time […]

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Percona XtraDB Cluster: Quorum and Availability of the cluster

 | June 12, 2015 |  Posted In: MySQL

Percona XtraDB Cluster (PXC) has become a popular option to provide high availability for MySQL servers. However many people are still having a hard time understanding what will happen to the cluster when one or several nodes leave the cluster (gracefully or ungracefully). This is what we will clarify in this post. Nodes leaving gracefully […]

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Optimizing Percona XtraDB Cluster for write hotspots

 | June 3, 2015 |  Posted In: InnoDB, Insight for DBAs, MySQL, Percona XtraDB Cluster

Some applications have a heavy write workload on a few records – for instance when incrementing a global counter: this is called a write hotspot. Because you cannot update the same row simultaneously from multiple threads, this can lead to performance degradation. When using Percona XtraDB Cluster (PXC), some users try to solve this specific […]

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Improving Percona XtraDB Cluster SST startup with Google Compute Engine snapshots

 | March 3, 2015 |  Posted In: Cloud and MySQL, MySQL, Percona XtraDB Cluster

As the need for information grows so does the size of data we need to keep in our databases. SST is unavoidable for spinning up new nodes in a PXC cluster and when datasets reach the “terra-byte” range this becomes ever more cumbersome requiring many hours for a new node to synchronize. More often that not, […]

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