You are NUMA pinning which means Aerospike only has access to RAM on the same NUMA node. This means that you only have ~48 GiB of RAM available to the process and you have configured it to have 89 GiB.
Reduce the memory-size to ~45 GiB, if you plan to run in this mode.
Note: with NUMA pinning, you would normally deploy an instance of Aerospike per NUMA node.
This discussion may help: Dual CPU Socket and Aerospike - #7 by tlo