NAME
nscd.conf − name service cache daemon configuration
SYNOPSIS
/etc/nscd.conf
DESCRIPTION
The nscd.conf file contains the configuration information for nscd(1M). Each line specifies either an attribute and a value, or an attribute, cachename, and a value. Fields are separated either by <SPACE> or <TAB> characters. A ’#’ (number sign) indicates the beginning of a comment; characters up to the end of the line are not interpreted by nscd.
cachename is represented by hosts, ipnodes, passwd, or groups.
attribute
supports the following:
logfile debug-file-name
Specifies name of the file to
which debug info should be written.
Use /dev/tty for standard output.
debug-level value
Sets the debug level desired.
value may range from 0 (the default) to
10. Use of this option causes nscd(1M) to run
in the foreground and not become a daemon. Note that the
output of the debugging command is not likely to remain the
same from release-to-release; scripts should not rely
on its format.
enable-cache cachename value
Enables or disables the specified cache. value may be either yes or no.
positive-time-to-live cachename value
Sets the time-to-live for positive entries (successful queries) in the specified cache. value is in integer seconds. Larger values increase cache hit rates and reduce mean response times, but increase problems with cache coherence. Note that sites that push (update) NIS maps nightly can set the value to be the equivalent of 12 hours or more with very good performance implications.
negative-time-to-live cachename value
Sets the time-to-live for negative entries (unsuccessful queries) in the specified cache. value is in integer seconds. Can result in significant performance improvements if there are several files owned by uids (user IDs) not in system databases; should be kept small to reduce cache coherency problems.
suggested-size cachename value
Sets the suggested number of hash buckets in the specified cache. This parameter should be changed only if the number of entries in the cache exceeds the suggested size by more than a factor of four or five. Since this is the internal hash table size, value should remain a prime number for optimum efficiency.
keep-hot-count cachename value
This attribute allows the administrator to set the number of entries nscd(1M) is to keep current in the specified cache. value is an integer number which should approximate the number of entries frequently used during the day.
check-files cachename value
Enables or disables checking the file belonging to the specified cachename for changes. If enabled (which is the default), changes in the corresponding file cause the cache to be invalidated within 10 seconds. Can be disabled if files are never modified for a slight performance boost, particularly over NFS. value may be either yes or no.
SEE ALSO
nscd(1M), group(4), hosts(4), ipnodes(4), passwd(4)
WARNINGS
The nscd.conf interface is included in this release on an uncommitted basis only and is subject to change or removal in a future minor release.