An understanding of PostgreSQL locking is important to build scalable applications and avoid downtime. Modern computers and servers have many CPU cores and it’s possible to execute multiple queries in parallel. Databases containing many consistent structures with changes made by queries or background processes running in parallel could crash a database or even corrupt […]Read more
This blog post describes how to keep sensitive data secure on slave servers in a MySQL async replication setup.
Almost every web application has a sensitive data: passwords, SNN, credit cards, emails, etc. Splitting the database to secure and “public” parts allows for restricting user and application parts access to sensitive data.
The ability to restore MySQL logical backups is a significant part of disaster recovery procedures. It’s a last line of defense.
Even if you lost all data from a production server, physical backups (data files snapshot created with an offline copy or with Percona XtraBackup) could show the same internal database structure corruption as in […]
In this article, we’ll describe how to collect PostgreSQL metrics with Percona Monitoring and Management (PMM).
We designed Percona Monitoring and Management (PMM) to be the best tool for MySQL and MongoDB performance investigation. At the same time, it’s built on mature opensource components: Prometheus’ time series database and Grafana. Starting from PMM 1.4.0. it’s possible to […]
This post focuses on the problem of the InnoDB log sequence number being in the future.
Preface: What is an InnoDB log sequence number?
The log sequence number (LSN) is an important database parameter used by InnoDB in many places. The most important use is for crash recovery and buffer pool purge control.
Internally, the InnoDB LSN counter […]