Running 32 bit Rhel 6.5 with kernel 2.6.32-431.el6.i686 on a server with 46 Gb RAM and NUMA support.
Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz
OS is not able to see more than 14GB RAM and lscpu not showing any NUMA nodes in output. numastat complains system as not NUMA aware.
config-2.6.32-431.el6.i686|grep -i numa
CONFIG_X86_NUMAQ is not set CONFIG_NUMA is not set
total used free shared buffers cached Mem: 14682 697 13985 0 89 408 Low: 242 230 12 High: 14439 466 13972
sysfs not mounted or system not NUMA aware: No such file or directory
sysfs on /sys type sysfs (rw)
- Can there be any limitation for 32 bit OS on NUMA systems?
- Why is OS not able to access 46 GB(2^36 > 46 Gb) even with PAE,is it because of NUMA disabled?
On 64 bit its working fine.