persistedTiles property
Number of tiles persisted successfully (only significant when using buffering)
This value will not necessarily change with every change to successfulTiles. 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 successfulTiles.
For more information about buffering, see the appropriate docs page.
Implementation
final int persistedTiles;