nickva commented on issue #5821:
URL: https://github.com/apache/couchdb/issues/5821#issuecomment-3756051080
If you want, it's not that hard to add it.
Need two things:
1) enable mem_sup first in vm.args
```diff
--os_mon start_memsup false
+-os_mon start_memsup true
```
2) Get the memory data in the _system call from memsup:
/src/chttpd/src/chttpd_node.erl
```diff
[
{memory, {Memory}},
+ {system_memory, {memsup:get_system_memory_data()}},
{run_queue, SQ},
```
This should do what you want:
```
% http $DB/_node/_local/_system | jq '.system_memory'
{
"system_total_memory": 17179869184,
"free_memory": 343363584,
"total_memory": 17179869184
}
```
But I agree in general with Bob and Jan that it may be better to get this
from your infra stack as it would have a better view of system metrics. This is
gathered by Erlang VM and I am not sure how reliable or maintained this system
is, if it works on Windows or other OSes properly etc.
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