Your website is only as fast as its slowest component. In a WordPress server infrastructure, database servers are often the slowest. This is because databases depend on good old hard disks instead of the super fast server memory to fetch data.
In high traffic WordPress websites, database servers are known to incur intermittent downtime and performance bottlenecks. Today we’ll see how a Percona XtaDB cluster can be used to deliver WordPress high availability hosting.
MySQL database server is widely used by online businesses to store their critical and valuable data. MariaDB and Percona are other database servers based on MySQL.
But the confidentiality and security of these database servers goes for a toss when one fine morning a vulnerability or exploit in the software gets published.
It was only a couple of months ago that the MySQL vulnerability CVE-2016-6662 ‘Remote Root Code Execution’ / ‘Privilege Escalation’ got revealed.
Two more critical vulnerabilities in MySQL has been revealed recently, which can lead to a server hack by executing arbitrary code and gaining root privilege.
On Sep 12th, Dawid Golunski announced CVE-2016-6662 aka MySQL Remote Root Code Execution / Privilege Escalation (0 day) vulnerability.
CVE-2016-6662 is reported as a critical exploit which can allow local and remote attackers to execute arbitrary code with root privileges in a vulnerable MySQL server. (more…)
Percona is a high performance alternative for MySQL. It uses a modified InnoDB engine called XtraDB, and uses Galera’s clustering technology to offer better performance and uptime than MySQL. Today, let’s take a look at how you can setup a Percona cluster, and migrate your databases from MySQL. (more…)
In an earlier post, we discussed how Percona XtraDB Cluster (PXC) can be used to achieve database high availability. PXC uses master-master replication, which makes each server in the cluster capable of making changes to the database. In such a system, data update conflicts are possible if servers are not in sync. Percona bootstrapping is a way to avoid conflicts when starting up a cluster.
A properly configured backup helps you bounce back from a server failure within minutes. However, backups impose a performance penalty and it is known to even bring down servers due to high load. So, backups should be setup such that it uses as little resources as possible. (more…)
From WordPress to Magento, almost all popular web apps use MySQL as their default database. While MySQL is easy to use and administer, it causes frequent performance issues in web hosting servers. Many website owners and web hosting providers now use high performance MySQL alternatives such as MariaDB or Percona. (more…)
MySQL is by far the most popular database used for web applications. It is a very easy database to use, but it doesn’t have the best uptime record. Many database issues such as corrupted tables, resource limits, or replication errors often lead to website downtime. (more…)
In any web server infrastructure, database servers are often the slowest. This is because databases fetch data from good ol’ hard disks instead of the super fast server memory. High speed storage such as RAID and SSDs have been able to reduce the latency, but if a site visit requires database access, it’ll induce significant page load delay. (more…)
Backups are your insurance against server failures. A well designed backup helps you quickly get back online even if the whole server is lost. For modern websites running WordPress, Magento, etc., the entire information is stored in databases. So, a sound backup design for such sites should include reliable database backups. (more…)