persistedSize property
Number of kibibytes successfully persisted (only significant when using buffering)
This value will not necessarily change with every change to successfulSize. It will only change after the buffer has been written.
Tiles that fall within this number are safely persisted to the database and cannot be lost as a consequence of a crash, unlike successfulSize.
For more information about buffering, see the appropriate docs page.
Implementation
final double persistedSize;