append(buf, "total", () -> osProbe.getTotalPhysicalMemorySize());
        buf.append("},");
        buf.append("\"swap_space\":{");
        append(buf, "free", () -> osProbe.getFreeSwapSpaceSize()).append(',');
        append(buf, "total", () -> osProbe.getTotalSwapSpaceSize());
        buf.append('}');
        buf.append("},");
        buf.append("\"cpu\":{");

        final OsMemorySwapSpaceObj osMemorySwapSpaceObj = new OsMemorySwapSpaceObj();
        osMemoryObj.swapSpace = osMemorySwapSpaceObj;
        osMemorySwapSpaceObj.free = osProbe.getFreeSwapSpaceSize();
        osMemorySwapSpaceObj.total = osProbe.getTotalSwapSpaceSize();
        final OsCpuObj osCpuObj = new OsCpuObj();
        osObj.cpu = osCpuObj;
        osCpuObj.percent = osProbe.getSystemCpuPercent();