Actually, I was incorrect about the ARP entries, looking at the show iparp output on an X440-48t, I am seeing an 8192 ARP entry limit. and as far as I know,there aren't any limits per VLAN
X440-48t-10G.2 # show iparp
-truncated-
Max ARP entries : 8192 Max ARP pending entries : 256
ARP address check: Enabled ARP refresh : Enabled
Timeout : 20 minutes ARP Sender-Mac Learning : Disabled
Locktime : 1000 milliseconds
Retransmit Time : 1000 milliseconds
Reachable Time : 900000 milliseconds (Auto)
Fast Convergence : Off