I use OpenIndiana
vasil@node11:~/mongo$ uname -a
SunOS node11 5.11 oi_151a7 i86pc i386 i86pc Solaris
vasil@node11:~/mongo$ prtconf | grep Mem
Memory size: 8192 Megabytes
vasil@node11:~/mongo$ psrinfo -pv
The physical processor has 2 virtual processors (0 2)
x86 (GenuineIntel 6F6 family 6 model 15 step 6 clock 3000 MHz)
Intel(r) Xeon(r) CPU 5160 @ 3.00GHz
The physical processor has 2 virtual processors (1 3)
x86 (GenuineIntel 6F6 family 6 model 15 step 6 clock 3000 MHz)
Intel(r) Xeon(r) CPU 5160 @ 3.00GHz
MongoDB
2.2.4 work fine