GitHub user JoaoJandre added a comment to the discussion: KVM snapshots are not 
being removed

Hello @bigsys-it,

The KVM incremental snapshots will be kept in storage until no new snapshot 
depends on them, as @DaanHoogland explained.
By default, a snapshot chain will last 16 snapshots, then a new chain will be 
created; meaning that after you create 16 snapshots, on the 17th, it will be a 
new full snapshot and will not depend on the previous 16; thus, when the 16th 
snapshot is deleted, its whole chain will also be gone.

To configure this behavior you may change the `snapshot.delta.max` parameter to 
a different snapshot chain size.

GitHub link: 
https://github.com/apache/cloudstack/discussions/11959#discussioncomment-14857168

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