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Percona XtraDB Cluster Transaction Replay Anomaly

 | April 23, 2017 |  Posted In: MySQL, Percona XtraDB Cluster, XtraDB Cluster

wsrep-stages

In this blog post, we’ll look at a transaction replay anomaly in Percona XtraDB Cluster. Introduction Percona XtraDB Cluster/Galera replays a transaction if the data is non-conflicting but, the transaction happens to have conflicting locks. Anomaly Let’s understand this with an example: Let’s assume a two-node cluster (node-1 and node-2) Base table “t” is created […]

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BEWARE: Increasing fc_limit can affect SELECT latency

 | April 22, 2017 |  Posted In: MySQL, Percona XtraDB Cluster, XtraDB Cluster

SELECT Latency

In this blog post, we’ll look at how increasing the fc_limit can affect SELECT latency. Introduction Recent Percona XtraDB Cluster optimizations have exposed fc_limit contention. It was always there, but was never exposed as the Commit Monitor contention was more significant. As it happens with any optimization, once we solve the bigger contention issues, smaller […]

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Better Than Linear Scaling

 | April 22, 2017 |  Posted In: Hardware and Storage, High-availability, Insight for DBAs, Insight for Developers, MySQL

Scalability

In this blog, we’ll look at how to achieve better-than-linear scaling. Scalability is the capability of a system, network or process to handle a growing amount of work, or its potential to be enlarged to accommodate that growth. For example, we consider a system scalable if it is capable of increasing its total output under […]

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Percona Monitoring and Management 1.1.3 is Now Available

 | April 21, 2017 |  Posted In: Database Monitoring, Events and Announcements, MariaDB, MongoDB, MySQL, Orchestrator, Percona Monitoring and Management, Percona Server, Percona Server for MongoDB, Percona Software, Percona XtraDB Cluster, PMM, Prometheus, ProxySQL, ProxySQL

Percona Monitoring and Management

Percona announces the release of Percona Monitoring and Management 1.1.3 on April 21, 2017. For installation instructions, see the Deployment Guide. This release includes several new graphs in dashboards related to InnoDB and MongoDB operation, as well as smaller fixes and improvements.

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Percona Server for MySQL in Docker Swarm with Secrets

 | April 21, 2017 |  Posted In: Docker, MySQL, Security

This quick post demonstrates using Percona Server for MySQL in Docker Swarm with some new authentication provisioning practices. Some small changes to the startup script for the Percona-Server container image allows us to specify a file that contains password values to set as our root user’s secret. “Why do we need this functionality,” I hear you cry? When we […]

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Simplified Percona XtraDB Cluster SSL Configuration

 | April 21, 2017 |  Posted In: MySQL, Percona XtraDB Cluster, Security, XtraDB Cluster

wsrep-stages

In this blog post, we’ll look at a feature that recently added to Percona XtraDB Cluster 5.7.16, that makes it easier to configure Percona XtraDB Cluster SSL for all related communications. It uses mode “encrypt=4”, and configures SSL for both IST/Galera communications and SST communications using the same SSL files. “encrypt=4” is a new encryption […]

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How to Setup and Troubleshoot Percona PAM with LDAP for External Authentication

 | April 21, 2017 |  Posted In: Insight for DBAs, MySQL, Security

Percona PAM

In this blog, we’ll look at how to setup and troubleshoot the Percona PAM authentication plugin. We occasionally get requests from our support clients on how to get Percona Server for MySQL to authenticate with an external authentication service via LDAP or Active Directory. However, we normally do not have access to client’s infrastructure to […]

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Enabling Percona XtraDB Cluster SST Traffic Encryption

 | April 21, 2017 |  Posted In: Percona XtraDB Cluster, Security, XtraDB Cluster

wsrep-stages

In this blog post, we’ll look at enabling Percona XtraDB Cluster SST Traffic Encryption, and some of the changes to the SSL-based encryption of SST traffic in Percona XtraDB Cluster 5.7.16. Some background Percona XtraDB Cluster versions prior to 5.7 support encryption methods 0, 1, 2 and 3: encrypt = 0 : (default) No encryption encrypt […]

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Percona Live Featured Session with Alibaba Cloud – Flashback: Rolling Back a MySQL/MariaDB Instance, Database or Table to a Previous Snapshot

 | April 20, 2017 |  Posted In: open source databases, Percona Live

Percona Live 2017

Welcome to another post in the series of Percona Live featured session blogs! In these blogs, we’ll highlight some of the session speakers that will be at this year’s Percona Live conference. We’ll also discuss how these sessions can help you improve your database environment. Make sure to read to the end to get a special Percona Live 2017 registration […]

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