hi everyone this is my server information: OS: CentOS7.1 (latest update) server: DL 380 G7 ovirt: 3.6.2 [root@hv ~]# cat /proc/sys/fs/file-max 4896581 [root@hv ~]# cat /proc/sys/fs/file-nr 10416 0 4896581 [root@hv ~]# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 192428 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 192428 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited my open files seem to be increased: [root@hv ~]# lsof |wc -l 1454641 acording my information , do i need increase file descriptor? how can i increase them? thanks inadvance