Nsslapd-Reservedescriptors (Reserved File Descriptors) - Red Hat DIRECTORY SERVER 7.1 Configuration

Core Server Configuration Attributes Reference
Syntax:
Example:

nsslapd-reservedescriptors (Reserved File Descriptors)

This read-only attribute specifies the number of file descriptors that Directory
Server reserves for managing non-client connections, such as index management
and managing replication. The number of file descriptors that the server reserves
for this purpose subtracts from the total number of file descriptors available for
servicing LDAP client connections (see "nsslapd-maxdescriptors (Maximum File
Descriptors)," on page 69).
Most installations of Directory Server should never need to change this attribute.
However, consider increasing the value on this attribute if all of the following are
true:
• The server is replicating to a large number of consumer servers (more than
10), and/or the server is maintaining a large number of index files (more than
30).
• The server is servicing a large number of LDAP connections.
• You are seeing error messages reporting that the server is unable to open file
descriptors (the actual error message will differ depending on the operation
that the server is attempting to perform), but these error messages are NOT
related to managing client LDAP connections.
Increasing the value on this attribute may result in more LDAP clients being
unable to access your directory. Therefore, when you increase the value on this
attribute, you should also increase the value on the
attribute. You may not be able to increase the
your server is already using the maximum number of file descriptors that your
operating system allows a process to use (see your operating system
documentation for details). If this is the case, then reduce the load on your server
by causing LDAP clients to search alternative directory replicas.
To assist you in computing the number of file descriptors you set for this
attribute, we suggest you use the following formula:
nsslapd-reservedescriptor = 20 + (
NglobalIndex
PTADescriptors
where:
74 Red Hat Directory Server Configuration, Command, and File Reference • May 2005
DirectoryString
nsslapd-referralmode: ldap://ldap.example.com
ReplicationDescriptor
+
SSLDescriptors
+
nsslapd-maxdescriptors
nsslapd-maxdescriptors
NldbmBackends
* 4) +
ChainingBackendDescriptors
+
value if
+