1. A method comprising: detecting a failure of a first RDBMS instance of a plurality of RDBMS instances of a shared-disk database system; wherein a compute cluster is configured to store, in memory, one or more tables stored by the shared-disk database system; wherein the first RDBMS instance is configured to modify the one or more tables stored by the shared-disk database system and transfer modified data to the compute cluster to update the one or more tables at the compute cluster; after detecting the failure of the first RDBMS instance, scanning redo records generated by the first RDBMS instance; identifying, based on said scanning, pending modified data that was not transferred to the compute cluster before the failure; transferring the pending modified data to the compute cluster; wherein the method is performed by one or more computing devices.