/dev/shm

Hello Expoerts - Current environment has hugepages configured on Linux OS.

We have doubt on memory allocation to /dev/shm with hugepages allocation.

With hugepages configuration, is there a requirement to allocate memory to /dev/shm. Based on oracle documentation, it looks like /dev/shm is only used when AMM is used.

Does it mean in case of hugepages configuration, /dev/shm config can be completely eliminated or downsize to minimum value for the process that needs shared memory config (i.e. /dev/shm). For example ASM uses AMM configuration by default, so in that case downsize /dev/shm to minimum value like 2-3G versus default configuration (i.e. 50% of total OS memory).