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Why Incremental accumulative backup has the same size as a full backup

Mitya HORTOct 26 2021 — edited Oct 26 2021

Hi Team,
Do you use to face the issue like me or not. I have 2 backup type.
Is full backup which is backup every Monday - size arround 60GB
Is incremental accumulative backup is backup from Tuesday to Sunday , size of backup should me around 3GB ( backup only block change). but i notice that every two days system is backup size same as full backup ( size = 60GB) even script is used for incremental accumulative backup. but the same script was applied with other database environment system is working properly meaning that On Monday size of backup is full and Tuesday to Sunday size of backup is incremental accumulative backup.
Mr. Mitya

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Added on Oct 26 2021