Setting up a RAMdisk?

So I have a fast growing community, and a pretty decent server host/specs with a fairly large map. I currently run a 10k x 10k survival server map on a 60gb SSD and once we reach 30+ people online, the TPS starts dropping and I am getting the "WARNING: Can't keep up!..." messages. I have been doing some research and setting up a RAMdisk keeps popping up, but they are always talking and using very small maps as an example, so I am not sure if this is something I should be doing. Here's some of our server specs:

- Intel Xeon E3-1230 3.2GHZ 5GT/S8MB Cache Quad Core L1155 CPU
- 16GB Dedicated RAM
- 60gb SSD and a 1 TB HDD for backups
- Current world map is 3.2Gb (1.8gb compressed)

Our current plugin list:
-Essentials
-Multiverse Core/Portals/Inventory
-LWC
-McMMO
-SimplyVanish
-World Border
-World Guard
-World Edit
-EndReset
-Vault
-MobArena
-MagicCarpet
-Hatme
-ATMsigns
-Lottery+
-Automsg
-Disguisecraft
-SignRank
-Stargate
-Votifier
-FoundDiamonds
-NoLagg
-SignThatBlock
-TimeLock
-MobSpawnController
-SignShop
-CoreProtect
-CasinoSlots
-Dynmap
-MobDisguisePVPControl
-MineBackup
-Autodisc
-BA Spleef
-Simple Spleef

I guess the main question is, is it even reasonable to setup a RAMdisk when our world is over 3Gb in size? We have 16Gb of RAM, so maybe it is? Wanted to get some opinions... Thanks!