What happens when the USN change journal reaches maximum size, How and when it is truncated below the maximum size?

Bakya ABL 21 Reputation points

The target maximum size for the change journal, in bytes. The change journal can grow larger than this value, but it is then truncated at the next NTFS file system checkpoint to less than this value.

From Microsoft Doc ns-winioctl-usn_journal_data_v0 , I can understand that the change journal grows larger than maximum size and then its truncated to lesser value during next NTFS file system checkpoint. I would like to know what is NTFS checkpoint and what is the time duration between 2 ntfs checkpoints.

Windows API - Win32
Windows API - Win32
A core set of Windows application programming interfaces (APIs) for desktop and server applications. Previously known as Win32 API.
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  1. Junjie Zhu - MSFT 13,276 Reputation points Microsoft Vendor

    Welcome to Microsoft Q&A!

    If it is the system default, the interval between checkpoints should be 10s.

    Thank you.

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