nscd.conf — name service cache daemon configuration file
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
Specifies name of the file to which debug info should be written.
Sets the desired debug level. The default is 0.
This is the number of threads that are started to wait for requests. At least five threads will always be created.
Specifies the maximum number of threads. The default is 32.
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.
Specifies the user who is allowed to request statistics.
Limit on the number of times a cached entry gets reloaded without being used before it gets removed. The default is 5.
Enabling paranoia mode causes nscd to restart itself periodically. The default is no.
Sets the restart interval to
timeseconds if periodic restart is enabled by enabling
paranoiamode. The default is 3600.
Enables or disables the specified
servicecache. The default is no.
Sets the TTL (time-to-live) for positive entries (successful queries) in the specified cache for
Valueis in seconds. Larger values increase cache hit rates and reduce mean response times, but increase problems with cache coherence.
Sets the TTL (time-to-live) for negative entries (unsuccessful queries) in the specified cache for
Valueis 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.
This is the internal hash table size,
valueshould remain a prime number for optimum efficiency. The default is 211.
Enables or disables checking the file belonging to the specified
servicefor changes. The files are
/etc/netgroup. The default is yes.
Keep the content of the cache for
serviceover server restarts; useful when
paranoiamode is set. The default is no.
The memory mapping of the nscd databases for
serviceis 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. The default is no.
The maximum allowable size, in bytes, of the database files for the
service. The default is 33554432.
When set to
groupservice, then the
.bynamerequests are not added to
group.bygidcache. This can help with tables containing multiple records for the same ID. The default is yes. This option is valid only for services
The default values stated in this manual page originate from the source code of nscd(8) and are used if not overridden in the configuration file. The default values used in the configuration file of your distribution might differ.
This page is part of release 4.07 of the Linux
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description of the project, information about reporting bugs,
and the latest version of this page, can be found at
Copyright (c) 1999, 2000 SuSE GmbH Nuernberg, Germany
Author: Thorsten Kukuk <kukuksuse.de>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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