LONG MAX

From OpenVZ Linux Containers Wiki

LONG_MAX is a constant which is equal to 2147483647 (2³¹-1) on 32-bit architectures (such as x86) and to 9223372036854775807 (2⁶³-1) on 64-bit architectures (such as x86_64 and ia64).

This value is use as 'unlimited' by vzctl when setting user beancounter values.