Specifies the minimum number of mnodes (MVFS data structures that keep track of files and directories) on the free list that can point to underlying storage pool (cleartext) file objects. An mnode is on the free list if it was used recently but is now idle. Caching a pointer to a cleartext file in an mnode can reduce the time needed to open the associated file. However, caching this pointer keeps a file descriptor to the cleartext file open across the network. Too many open file descriptors can cause problems. The recommended minimum size of this cache is the base size set when Scaling Factor to Initialize MVFS with More Memory is 1. You can reduce the size to a smaller value.