Netscape DIRECTORY SERVER 6.01 Configuration Manual page 64

Core Server Configuration Attributes Reference
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
Note that 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:
Table 2-1
nsslapd-reservedescriptor = 20 + (NldbmBackends * 4) +
NglobalIndex + ReplicationDescriptor + ChainingBackendDescriptors
+ PTADescriptors + SSLDescriptors
where:
NldbmBackends
NglobalIndex
64 Netscape Directory Server Configuration, Command, and File Reference • January 2002
nsslapd-reservedescriptor value formula
nsslapd-maxdescriptors
nsslapd-maxdescriptors
Number of ldbm databases
Total number of configured indexes for all
databases including system indexes.
(By default 8 system indexes and 17 additional
indexes per database).
attribute.
value if