NSCD.CONF(5)

NAME
/etc/nscd.conf - name service cache daemon configuration file

DESCRIPTION
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.

SEE ALSO
nscd(8)

COLOPHON
This page is part of release 2.76 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.