Red Hat DIRECTORY SERVER 8.1 Command Reference Manual page 178

Chapter 3. Plug-in Implemented Server Functionality Reference
3.4.1.2. nsslapd-idlistscanlimit
This performance-related attribute, present by default, specifies the number of entry IDs that are
searched during a search operation. Attempting to set a value that is not a number or is too big for a
32-bit signed integer returns an LDAP_UNWILLING_TO_PERFORM error message, with additional error
information explaining the problem.
It is advisable to keep the default value to improve search performance. For a more detailed
explanation of the effect of ID lists on search performance, refer to the "Managing Indexes" chapter in
the Directory Server Administrator's Guide.
The server has to be restarted for changes to this attribute to go into effect.
Parameter
Entry DN
Valid Range
Default Value
Syntax
Example
3.4.1.3. nsslapd-cache-autosize
This performance tuning-related attribute, which is turned off by default, specifies the percentage of
free memory to use for all the combined caches. For example, if the value is set to 80, then 80 percent
of the remaining free memory would be claimed for the cache. To run other servers on the machine,
then set the value lower. Setting the value to 0 turns off the cache autosizing and uses the normal
nsslapd-cachememsize and nsslapd-dbcachesize attributes.
NOTE
If the nsslapd-cache-autosize attribute and nsslapd-cache-autosize-split
attribute are both set to high values, such as 100, then the Directory Server may fail
to start and return an error message. To fix this issue, reset the nsslapd-cache-
autosize and nsslapd-cache-autosize-split attributes to a more reasonable
level. For example:
nsslapd-cache-autosize: 60
nsslapd-cache-autosize-split: 60
Parameter
Entry DN
Valid Range
Default Value
Syntax
Example
164
Description
cn=config, cn=ldbm database, cn=plugins,
cn=config
100 to the maximum 32-bit integer value
(2147483647) entry IDs
4000
Integer
nsslapd-idlistscanlimit: 4000
Description
cn=config, cn=ldbm database, cn=plugins,
cn=config
0 (turns cache autosizing off) to 100
0
Integer
nsslapd-cache-autosize: 80