"maximum open file descriptors" is set to at least 65536_please set the maximum number of open file descrip

安装oracle或者其他oracle产品时候，最后检查项目提示问题，

请确保配置了合适的资源限制参数，资源限制配置参数文件为：

/etc/security/limits.conf

注意，如果想让此配置文件生效，需要将 session required pam_limits.so 加入/etc/pam.d/login中

另外，可以使用ulimit ,

ulimit [-HSTabcdefilmnpqrstuvx [limit]]
              Provides control over the resources available to the shell and to  processes  started  by
              it,  on  systems that allow such control.  The -H and -S options specify that the hard or
              soft limit is set for the given resource.  A hard limit cannot be increased by a non-root
              user once it is set; a soft limit may be increased up to the value of the hard limit.  If
              neither -H nor -S is specified, both the soft and hard limits  are  set.   The  value  of
              limit can be a number in the unit specified for the resource or one of the special values
              hard, soft, or unlimited, which stand for the current hard limit, the current soft limit,
              and  no limit, respectively.  If limit is omitted, the current value of the soft limit of
              the resource is printed, unless the -H option is given.  When more than one  resource  is
              specified,  the  limit  name  and  unit  are printed before the value.  Other options are
              interpreted as follows:
              -a     All current limits are reported
              -b     The maximum socket buffer size
              -c     The maximum size of core files created
              -d     The maximum size of a process鈥檚 data segment
              -e     The maximum scheduling priority ("nice")
              -f     The maximum size of files written by the shell and its children
              -i     The maximum number of pending signals
              -l     The maximum size that may be locked into memory
              -m     The maximum resident set size (many systems do not honor this limit)
              -n     The maximum number of open file descriptors (most systems do not allow this  value
                     to be set)
              -p     The pipe size in 512-byte blocks (this may not be set)
              -q     The maximum number of bytes in POSIX message queues
              -r     The maximum real-time scheduling priority
              -s     The maximum stack size
              -t     The maximum amount of cpu time in seconds
              -u     The maximum number of processes available to a single user
              -v     The maximum amount of virtual memory available to the shell
              -x     The maximum number of file locks
              -T     The maximum number of threads

              If  limit  is given, it is the new value of the specified resource (the -a option is dis-
              play only).  If no option is given, then -f is assumed.  Values are in  1024-byte  incre-
              ments,  except for -t, which is in seconds, -p, which is in units of 512-byte blocks, and
              -T, -b, -n, and -u, which are unscaled values.  The return status is 0 unless an  invalid
              option or argument is supplied, or an error occurs while setting a new limit.

比如查看当前资源限制：

ulimit  -a