Extra space consumed by AutoSave cycles

[beojan]

It’s fairly well known that the AutoSave mechanism leads to the last two cycles of each tree being saved in a file. Am I correct in thinking the extra cycle consumes only the space required for the metadata, not the space for the data itself?

If not, how can I remove the extra cycle and recover the space used?

[bellenot]

@beojan

Am I correct in thinking the extra cycle consumes only the space required for the metadata, not the space for the data itself?

I think you are correct. (@pcanal can confirm)

@beojan

If not, how can I remove the extra cycle and recover the space used ?

You can use the kWriteDelete or the kOverwrite option. See the documentation of TObject::Write() or TDirectory::Write()