Assume that you use In-Memory OLTP in Microsoft SQL Server 2014. You create a database that contains a memory-optimized file group and then run a workload. When you query the sys.databases catalog view, the log_reuse_wait_desc column of the database shows a value of XTP_CHECKPOINT. This means that log truncation is waiting for a checkpoint. However, even after multiple checkpoints are issued, the log_reuse_wait_desc column still shows XTP_CHECKPOINT.
Cumulative update information
The issue was first fixed in the following Service Pack for SQL Server.
Service packs are cumulative. Each new service pack contains all the fixes that are in previous service packs, together with any new fixes. Our recommendation is to apply the latest service pack and the latest cumulative update for that service pack. You do not have to install a previous service pack before you install the latest service pack. Use Table 1 in the following article for finding more information about the latest service pack and latest cumulative update.