Sorry but I don't agree with this ... Slony is a replication solution ... I don't need replication ... what will I do when my database will grow up to 50 Gb ... I'll need more than 50 Gb of RAM on each server ???
This solution is not very realistic for me ...
Have you confirmed you need a 1:1 RAM:data ratio? Of course more memory gets more speed but often at a diminishing rate of return. Unless every record of your 50GB is used in every query, only the most commonly used elements of your DB needs to be in RAM. This is the very idea of caching.
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