No data is actually written to the files unless the operating system needs to swap to disk due to memory pressure.instance could sometimes fail if resources are constrained.You could give each account its own Realm file that will be used as the default Realm by doing the following: The most common location to store writable Realm files is the “Documents” directory on i OS and the “Application Support” directory on mac OS.
Since the auxiliary files can sometimes be lazily created and deleted mid-operation, we recommend that you apply the file protection attributes to the parent folder containing these Realm files.
This will ensure the attribute is properly applied to all of the relevant Realm files, regardless of their creation time. A synchronized Realm uses the Realm Object Server to transparently synchronize its contents with other devices.
You can do this by setting the Realm works in such a way that the size of a Realm file is always larger than the total size of the objects stored within it.
See our documentation on threading for some of the reasons why this architecture enables some of Realm’s great performance, concurrency and safety advantages.
In practice, this can only happen the first time a Realm instance is created on a given thread.