The index does not get smaller after removing the vector

[Amphetaminewei]

I'm using chroma 0.5.0 by PersistentClient and I've noticed that the index doesn't get smaller when I delete the vector.
By consulting the data, i found that the HNSW index only supports increments and does not support vector deletion. What is chroma's current policy for removing vectors?
In my usage scenario, my database is deployed on a local PC, and I record the vector data of all the text files of the user in the database and update it as the user adds/deletes files, so if there is no deletion scenario, my database may grow indefinitely and occupy more and more memory of the user.

[tazarov]

@Amphetaminewei, you are right on the HNSW growing. We have similar issue open - #2594 and a PR to address this #2621.

I am also working on a bit of tooling to rebuild HNSW indices.