Controls the size of the cache of client handles that contact the NFS authentication server. This server authenticates NFS clients to determine whether they are allowed access to the file handle that they are trying to use.
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This cache is not dynamic, so attempts to allocate a client handle when all are busy will fail. This failure results in requests being dropped by the NFS server because they could not be authenticated. Most often, this result is not a problem because the NFS client just times out and retransmits the request. However, for soft-mounted file systems on the client, the client might time out, not retry the request, and then return an error to the application. This situation might be avoided if you ensure that the size of the cache on the server is large enough to handle the load.