append(buf, "total", () -> processProbe.getProcessCpuTotalTime());
        buf.append("},");
        buf.append("\"virtual_memory\":{");
        append(buf, "total", () -> processProbe.getTotalVirtualMemorySize());
        buf.append('}');
        buf.append("},");
    }

    private void appendOsStats(final StringBuilder buf) {
        buf.append("\"os\":{");