Unable to get total result count in service now

You may use the X-Total-Count in the response headers. According to the documentation (https://developer.servicenow.com/dev.do#!/reference/api/orlando/rest/c_TableAPI), this parameter should only return the count of records for the request you passed.

But from what I am seeing, it always returns total count of records available for that table object.

For instance, your request - https:///api/now/table/kb_knowledge?sysparm_limit=10&sysparm_offset=0 should result in X-Total-Count = 10 but it returns the total number of records available for kb_knowledge table object.

had the same issue but if you use the stats API you can use this parameter

https:///api/now/stats/kb_knowledge?sysparm_count=true

you'll get this response

{
    "result": {
        "stats": {
            "count": "34"
        }
    }
}