The file
/etc/nscd.conf is read from
nscd(8)
at startup. Each line specifies either an attribute and a value, or an
attribute, service, and a value. Fields are separated either by SPACE
or TAB characters. A ‘#’ (number sign) indicates the beginning of a
comment; following characters, up to the end of the line,
are not interpreted by nscd.
Valid services are passwd, group, or hosts.
logfile
debug-file-name
Specifies name of the file to which debug info should be written.
debug-level
value
Sets the desired debug level.
threads
number
This is the number of threads that are started to wait for
requests. At least five threads will always be created.
server-user
user
If this option is set, nscd will run as this user and not as root.
If a separate cache for every user is used (-S parameter), this
option is ignored.
enable-cache
service
<yes|no>
Enables or disables the specified
service cache.
positive-time-to-live
service
value
Sets the TTL (time-to-live) for positive entries (successful queries)
in the specified cache for
service.
Value is in seconds. Larger values increase cache hit rates and reduce mean
response times, but increase problems with cache coherence.
negative-time-to-live
service
value
Sets the TTL (time-to-live) for negative entries (unsuccessful queries)
in the specified cache for
service.
Value is in seconds. Can result in significant performance improvements if there
are several files owned by UIDs (user IDs) not in system databases (for
example untarring the linux kernel sources as root); should be kept small
to reduce cache coherency problems.
suggested-size
service
value
This is the internal hash table size,
value should remain a prime number for optimum efficiency.
check-files
service
<yes|no>
Enables or disables checking the file belonging to the specified
service for changes. The files are
/etc/passwd,
/etc/group, and
/etc/hosts.
max-threads
threads
Specifies the maximum number of threads to be started.
stat-user
username
Specifies the user who is allowed to request statistics.
reload-count unlimited |
number
Limit on the number of times a cached entry gets reloaded without being used
before it gets removed. The default is 5.
paranoia
<yes|no>
Enabling paranoia mode causes nscd to restart itself periodically.
restart-interval
time
Sets the restart interval to
time seconds
if periodic restart is enabled by enabling
paranoia mode.
persistent
service
<yes|no>
Keep the content of the cache for
service over server restarts; useful when
paranoia mode is set.
shared
service
<yes|no>
The memory mapping of the nscd databases for
service is shared with the clients so
that they can directly search in them instead of having to ask the
daemon over the socket each time a lookup is performed.
