If it's as small as a single server, you probably don't need an SSD to cache access. If your db server is partitioned out, just put the whole fs on SSD. You can

If it's as small as a single server, you probably don't need an SSD to cache access. If your db server is partitioned out, just put the whole fs on SSD. You can't partition the L2ARC, so you really don't want to mix web assets with database volumes. The assets will push your db out of the cache unless it's so big that you're massively overpowered, or traffic so low it didn't matter in the first place. That's some hard won knowledge there. :-) (You can choose to cache assets meta-data only, but that tuning has major downsides itself and while it may protect your db, it's also likely to render your caches very under-utilized. Basically it isn't a silver bullet and it's still important to think of volumes and work-loads in terms of what "spindles" they're on.