append(buf, "committed", () -> mem.getNonHeapCommitted().getBytes());
        buf.append('}');
        buf.append("},");
        final List<BufferPool> bufferPools = jvmStats.getBufferPools();
        buf.append("\"pools\":{");
        buf.append(bufferPools.stream().map(p -> {
            final StringBuilder b = new StringBuilder();

        jvmMemoryNonHeapObj.used = mem.getNonHeapUsed().getBytes();
        jvmMemoryNonHeapObj.committed = mem.getNonHeapCommitted().getBytes();
        final List<BufferPool> bufferPools = jvmStats.getBufferPools();
        jvmObj.pools = bufferPools.stream().map(p -> {
            final JvmPoolObj jvmPoolObj = new JvmPoolObj();
            jvmPoolObj.key = p.getName();
            jvmPoolObj.count = p.getCount();