In my roles as a DBA at various companies, I generally found the tooling to be quite lacking. Everything from metrics collection, alerting, backup management; they were either missing, incomplete or implemented poorly. DBA-Tools was born from a desire to build backup tools that supported my needs in smaller/non-cloud environments. As BASH is easily the […]
Read More
Late one evening, I was staring at one of our large MySQL installations and noticed the database was hovering around 7-10 run queue length (48 cores, ~500 gigs memory, fusionIO cards). I had been scratching my head on how to get more throughput from the database. This blog records the changes I made to tune […]
Read More
I strongly believe in the community. Communities are the real strength of open source. Not just the theoretical ability to study, modify and share code – but the fact that other people out there are doing these things. Creating a base of knowledge and a network of relations.These can become work relationships, valuable discussions, open […]
Read More
As mentioned in a previous post, I gave a talk at Percona Live Europe 2018 about system-versioned tables. This is a new MariaDB 10.3 feature, which consists of preserving old versions of a table rows. Each version has two timestamps that indicate the start (INSERT,UPDATE) of the validity of that version, and its end (DELETE, […]
Read More
One of the most common questions about privileges in MySQL and MariaDB is how would a user revoke access to a particular table, in a large database with hundreds or thousands of tables, while keeping the rest available. Currently, there is no easy solution. Just grant access to everything else, individually. Not only does this […]
Read More
System-versioned tables, or temporal tables, are a typical feature of proprietary database management systems like DB2, Oracle and SQL Server. They also appeared at some point in PostgreSQL, but only as an extension; and also in CockroachDB, but in a somewhat limited fashion. The MariaDB® implementation is the first appearance of temporal tables in the MySQL […]
Read More