Help Increasing Capacity

I want to increase the capacity of my AWX serer without changing the hardware if possible its just a test server for the time being. I have tried setting SYSTEM_TASK_CAPACITY but nothing happens. Can someone please help me out. Below is current instance info

`

{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "id": 11,
            "type": "instance",
            "url": "[/api/v2/instances/11/](http://10.205.0.116/api/v2/instances/11/)",
            "related": {
                "jobs": "[/api/v2/instances/11/jobs/](http://10.205.0.116/api/v2/instances/11/jobs/)",
                "instance_groups": "[/api/v2/instances/11/instance_groups/](http://10.205.0.116/api/v2/instances/11/instance_groups/)"
            },
            "uuid": "00000000-0000-0000-0000-000000000000",
            "hostname": "awx-4-8shmm",
            "created": "2018-06-13T11:10:34.095545Z",
            "modified": "2018-06-20T21:44:26.186300Z",
            "capacity_adjustment": "1.00",
            "version": "1.0.6.16",
            "capacity": 20,
            "consumed_capacity": 6,
            "percent_capacity_remaining": 70.0,
            "jobs_running": 1,
            "cpu": 0,
            "memory": 0,
            "cpu_capacity": 6,
            "mem_capacity": 20,
            "enabled": true
        }
    ]
}

`