Hi I have both hdd and ssd disk on the postgres server. The cluster is right now created on the hdd only. I am considering using a tablespace to put some highly used postgres object on the ssd disk. Of course the ssd is small compared to the hdd, and I need to choose carefully what objects are stored on that side. I am wondering what kind of object (indexes, data) would benefit from ssd. The database primary/foreign keys are highly used and there is almost no sequencial scan. However the server has a large amount of ram memory and I suspect all of those indexes are already cached in ram. I have read that tablespaces introduce overhead of maintenance and introduce complication for replication. But on the other hand I have this ssd disk ready for something. Any recommandation ? -- nicolas paris
