Netscape DIRECTORY SERVER 6.1 Configuration Manual page 73

• 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:
nsslapd-reservedescriptor = 20 + (NldbmBackends * 4) + NglobalIndex
+ ReplicationDescriptor + ChainingBackendDescriptors +
PTADescriptors + SSLDescriptors
where:
NldbmBackends
NglobalIndex
ReplicationDescriptor
ChainingBackendDescriptors
PTADescriptors
SSLDescriptors
Core Server Configuration Attributes Reference
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).
NSupplierReplica + 8
(where NSupplierReplica is number of replicas
in the server that can act as a supplier (hub or
master)).
NchainingBackend *
nsOperationConnectionsLimit
(where nsOperationConnectionsLimit is
configurable in database link (chaining)
configuration and 10 by default).
3 if PTA is configured, 0 if PTA is not configured
5 (4 files + 1 listensocket) if SSL is configured, 0 if
SSL is not configured.
Chapter 2 Core Server Configuration Reference
attribute.
value if
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