@Override
    public Buffer allocate() {
        return allocate(this.pageSize);
    }
@Test
    public void testDefault() throws Exception {
        final PooledBufferAllocatorImpl allocator = new PooledBufferAllocatorImpl(4096);
        final Buffer buffer = allocator.allocate();
        assertEquals(0, buffer.offset());
        assertEquals(0, buffer.limit());
        assertEquals(4096, buffer.capacity());
        buffer.release();
    }