Virtual Columns in MySQL and Use cases.

Introduction: MySQL 5.7 introduces a new feature called virtual/generated column. It is called generated column because the data of this column is computed based on a predefined expression or from other columns. What is Virtual Column ? In general virtual columns appear to be normal table columns, but their values are derived rather than being … More Virtual Columns in MySQL and Use cases.

InnoDB ‘Linux aio’ returned OS error 0. Cannot continue operation.

We had faced a weird error for one of our client under Emergency MySQL Support, it was a slave server. Client stated that whenever he tries to Start the replication it goes of loop of restarts. We had a sharing session with the client, At first we intended to rebuild the slave with a fresh … More InnoDB ‘Linux aio’ returned OS error 0. Cannot continue operation.

Estimating records in index range and CPU Spike (MariaDB)

Recently we got paged by CPU spikes on one of our clients slave MySQL ( MariaDB ) server under MyDBOPS Remote DBA TeamĀ Support. Our MySQL Engineers started analysing the root cause of the issues and resolved it. This blog provides an overview of the troubleshooting and fix proposed. System Summary : Database server : 10.1.10-MariaDB-log … More Estimating records in index range and CPU Spike (MariaDB)

Galera Cluster a Walk through ( Presentation)

This presentation is about Galera. Galera is a synchronous high availability clustering solution designed for MySQL. At MyDBOPS we have customers on Galera. They depend on the Galera for their business high availability and read scaling. Handling and troubleshooting a Galera cluster needs more expertise. This presentation is a walk through on Galera Cluster with … More Galera Cluster a Walk through ( Presentation)