Some problems of NVM management

[SS5hane]

Hello,
in your paper, the NVM space used by MatrixKV is limited to 8G, but I find that the NVM space used in my test reached nearly 20G, is there some other reason?

And after my test, I found that in some cases the space of the deleted L0 sstable is not released immediately, which will cause the program crash, as shown in the figure.