Alexandre Busquets wrote:

I would test with sqlite.
wich is the string lookup
Ej: ${lookup mysql{ What has better performance with exim, mysql o postgresql

From decades of experience, we tend to prefer a proper Relational Database Engine for SQL 'heavy' or general-purpose use, (DB2, PostgreSQL, Oracle) and the Berkeley/GNU/CDB style tools for lightweight or narrower-function 'bespoke' use.

MySQL is used for a great many purposes, but is actually 'neither of the above'. It has never been a player in the 'heavy lifter' RDBMS class, and I would be surprised if it was a match speed/resource-usage wise against, for example, a CDB - which is all that Exim needs.

We might not use an SQL DB at all, save that we have other compelling reasons to have it on the server.

YMMV,

Bill


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