CouchBase Server increases space

Hi I try to explain my situation:
currently we have three servers with data, query, index and search services shared,
I’m moticing that the disk used for only one of the two buckets that we have grows every day even if we do not do operations this morning for example was 40 GB and now that I’m writing it has become 45GB
I can not understand where the problem lies,
Why does it grow?
Thank you in advance for your answers