postgresql

A while ago I read a paper about Optimizer Benchmarks: How Good Are Query Optimizers, Really? by Viktor Leis from Fakultät für Informatik of the Technische Universität München.

For a fancy application we want to query a chunk of rows from a table and therefore we need the minimum and the maximum of the Primary Key of these rows.

See also our former articles:

• Do not underestimate performance impacts of swapping on NUMA database systems
• MariaDB and MySQL swap analysis

When we do analysis of MariaDB Database servers we also check the memory (RAM and Swap) available:

If your MariaDB or MySQL database system is swapping it can have a significant impact on your database query performance! Further it can also slow down your database shutdown and thus influence the whole reboot of your machine. This is especially painful if you have only short maintenance windows or if you do not want to spend the whole night with operation tasks.

Im Admin-Magazin 2011/06 hat es einen netten Artikel über MySQL und PostgreSQL Performance Tuning: Duell der Datenbanken: In einem Shootout messen sich MySQL und PostgreSQL

Susanne hat dabei PostgreSQL, wir MySQL betreut...