No reason for big step in database node disk usage

Hi all, i have a problem in my app. The night before yesterday, my database node disk usage increased massively from 3000MB to 12000MB. I think it was during a scheduled event. The scheduled event creates invoices. This scheduled event is called each month for 1 year now and never happened something like this. I also investigated a the database before and after. The increase of database entries is just normal. I can not explain  why this disk usage increased like that. Has anyone an idea? Thanks for your help    
1 answers

What does your table/index size distribution look like for the same timespan?


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