Chapter 3. Plug-in Implemented Server Functionality Reference
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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
Description
Entry DN
cn=config, cn=ldbm database, cn=plugins,
cn=config
Valid Range
100 to the maximum 32-bit integer value
(2147483647) entry IDs
Default Value
4000
Syntax
Integer
Example
nsslapd-idlistscanlimit: 4000
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
Description
Entry DN
cn=config, cn=ldbm database, cn=plugins,
cn=config
Valid Range
0 (turns cache autosizing off) to 100
Default Value
0
Syntax
Integer
Example
nsslapd-cache-autosize: 80
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