If you have a DB bigger than RAM yes SSD makes a huge difference. I haven't considered non SSD in servers for 3 years when factoring in engineering cost https:

If you have a DB bigger than RAM yes SSD makes a huge difference. I haven't considered non SSD in servers for 3 years when factoring in engineering cost https://dba.stackexchange.com/a/59903 https://dba.stackexchange.com/a/59903 see DHH circa 2009 https://signalvnoise.com/posts/1509-mr-moore-gets-to-punt-on-sharding https://signalvnoise.com/posts/1509-mr-moore-gets-to-punt-on...