Hi @HSever ,
I have double checked with product team and can confirm that there is no such feature to impose size restrictions on particular schema level. As Nandan Hegde called out you can do implementing custom alert mechanism before reaching the target size or may be try to build a report to monitor the size.
By the way, could you please elaborate a bit on your use case and business justification for this requirement so that I can discuss with internal team and provide feedback as appropriate.
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Thank you