Hi,
I need some help considering the possible issue with setup of Huge pages on Oracle DB 12c.
So, setup is done like this:
This is the available space on OS(Oracle Linux 6.6) where database is installed:
$ free -k
total used free shared buffers cached
Mem: 4704316 4654236 50080 11708 26464 492692
-/+ buffers/cache: 4135080 569236
Swap: 10706940 0 10706940
$ cat /etc/security/limits.conf | grep memlock
# - memlock - max locked-in-memory address space (KB)
* soft memlock 4400000
* hard memlock 4400000
Recommendation per hugepages_settings.sh script is 1886 which is setup in /etc/sysctl.conf( vm.nr_hugepages = 1882)
Server and db restarted and this are the results:
grep HugePages /proc/meminfo
HugePages_Total: 1886
HugePages_Free: 4
HugePages_Rsvd: 0
HugePages_Surp: 0
Sga settings:
3760M
3760M
It seems that something is wrong as HugePages_Rsvd: 0 is always zero. Is this normal behavior, because documentation said that this value should be above zero?
Any help is appreciated.
Regards,
Savo