Red Hat Directory Server 8.0 Configuration, Command, and File Reference

attribute for non-client connections, such as index management and managing replication. The

nsslapd-reservedescriptors attribute is the number of file descriptors available for other

uses as described above. See Section 3.1.78, “nsslapd-reservedescriptors (Reserved File

Descriptors)”.

The number given here should not be greater than the total number of file descriptors that the

operating system allows the ns-slapd process to use. This number differs depending on the

operating system.

If this value is set too high, the Directory Server queries the operating system for the maximum

allowable value, and then use that value. It also issues a warning in the error log. If this value is

set to an invalid value remotely, by using the Directory Server Console or ldapmodify, the

server rejects the new value, keep the old value, and respond with an error.

Some operating systems let users configure the number of file descriptors available to a

process. See the operating system documentation for details on file descriptor limits and

configuration. The dsktune program (explained in the Directory Server Installation Guide) can

be used to suggest changes to the system kernel or TCP/IP tuning attributes, including

increasing the number of file descriptors if necessary. Increased the value on this attribute if the

Directory Server is refusing connections because it is out of file descriptors. When this occurs,

the following message is written to the Directory Server's error log file:

Not listening for new connections -- too many fds open

See Section 3.1.37, “nsslapd-conntablesize” for more information about increasing the number

of incoming connections.

NOTE

UNIX shells usually have configurable limits on the number of file descriptors.

See the operating system documentation for further information about limit and

ulimit, as these limits can often cause problems.

The server has to be restarted for changes to this attribute to go into effect.

Parameter Description

Entry DN cn=config

Valid Range 1 to 65535

Default Value 1024

Syntax Integer

Example nsslapd-maxdescriptors: 1024

Chapter 2. Core Server Configuration Reference