def METHOD_NAME(dvs, port_name, pfc_asym):
    cfg_db = swsscommon.DBConnector(swsscommon.CONFIG_DB, dvs.redis_sock, 0)
    port_tbl = swsscommon.Table(cfg_db, 'PORT')
    fvs = swsscommon.FieldValuePairs([('pfc_asym', pfc_asym)])
    port_tbl.set(port_name, fvs)
    time.sleep(1)