Definition of Savepoints in SAP HANA Environments
Savepoints are required to synchronize changes in memory with the persistency on disk level. All modified pages of row and column store are written to disk during a savepoint.
Each SAP HANA host and service has its own savepoints.
The data belonging to a savepoint represents a consistent state of the data on disk and remains untouched until the next savepoint operation has been completed.
The availability of a recent savepoint improves the restart time of SAP HANA, because less redo logs need to be applied to make the database consistent.