We are trying to figure out the hard limit for the FD, does nfs ganesha impose a limit? At the moment we are seeing these errors: 25/07/2019 19:27:59 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[cache_lru] lru_run :INODE LRU :WARN :Futility count exceeded. Client load is opening FDs faster than the LRU thread can close them. 25/07/2019 19:28:16 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[cache_lru] lru_run :INODE LRU :WARN :Futility count exceeded. Client load is opening FDs faster than the LRU thread can close them. 25/07/2019 19:28:34 : epoch 5d393d8c : nas2 : ganesha.nfsd-1681[svc_54] mdcache_lru_fds_available :INODE LRU :CRIT :FD Hard Limit Exceeded, waking LRU thread. 25/07/2019 19:29:02 : epoch 5d393d8c : nas : ganesha.nfsd-1681[svc_64] mdcache_lru_fds_available :INODE LRU :CRIT :FD Hard Limit Exceeded, waking LRU thread. The system limit: $ cat /proc/sys/fs/nr_open 2097152 And the limit for nfs-ganesha process: $ cat /proc/1681/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 385977 385977 processes Max open files 2097152 2097152 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 385977 385977 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us And the number of open files is # ls /proc/1681/fd | wc -w 12739 I don't see why we are hitting the FD limit as we only have 12739 FD count. It is impacting the NFS clients right now, file creation is fine but can't open an existing file to write. I'm using VFS FSAL, and the software versions are: nfs-ganesha-2.7.5-1.el7.x86_64 nfs-ganesha-vfs-2.7.5-1.el7.x86_64 Thanks. Gin