Optimizing DSPAM + MySQL 4.1
DSPAM is a scalable and open-source content-based spam filter designed for multi-user enterprise systems. It's great at filtering out spam but on busy mailservers the pruning of the MySQL databases takes way too long time...
The default purge-4.1.sql script provided with DSPAM can be heavily optimized by adding indexes to the database and using the indexes properly when pruning.
At Howto Forge.
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