1NSCD.CONF(5) Linux Programmer's Manual NSCD.CONF(5)
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6 /etc/nscd.conf - name service cache daemon configuration file
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9 The file /etc/nscd.conf is read from nscd(8) at startup. Each line
10 specifies either an attribute and a value, or an attribute, service,
11 and a value. Fields are separated either by SPACE or TAB characters.
12 A '#' (number sign) indicates the beginning of a comment; following
13 characters, up to the end of the line, are not interpreted by nscd.
14 Valid services are passwd, group, or hosts.
16 logfile debug-file-name
18 Specifies name of the file to which debug info should be writ‐
19 ten.
20 debug-level value
22 Sets the desired debug level.
23 threads number
25 This is the number of threads that are started to wait for
26 requests. At least five threads will always be created.
27 server-user user
29 If this option is set, nscd will run as this user and not as
30 root. If a separate cache for every user is used (-S parame‐
31 ter), this option is ignored.
32 enable-cache service <yes|no>
34 Enables or disables the specified service cache.
35 positive-time-to-live service value
37 Sets the TTL (time-to-live) for positive entries (successful
38 queries) in the specified cache for service. Value is in sec‐
39 onds. Larger values increase cache hit rates and reduce mean
40 response times, but increase problems with cache coherence.
41 negative-time-to-live service value
43 Sets the TTL (time-to-live) for negative entries (unsuccessful
44 queries) in the specified cache for service. Value is in sec‐
45 onds. Can result in significant performance improvements if
46 there are several files owned by UIDs (user IDs) not in system
47 databases (for example untarring the linux kernel sources as
48 root); should be kept small to reduce cache coherency problems.
49 suggested-size service value
51 This is the internal hash table size, value should remain a
52 prime number for optimum efficiency.
53 check-files service <yes|no>
55 Enables or disables checking the file belonging to the specified
56 service for changes. The files are /etc/passwd, /etc/group, and
57 /etc/hosts.
58 max-threads threads
60 Specifies the maximum number of threads to be started.
61 stat-user username
63 Specifies the user who is allowed to request statistics.
64 reload-count unlimited | number
66 Limit on the number of times a cached entry gets reloaded with‐
67 out being used before it gets removed. The default is 5.
68 paranoia <yes|no>
70 Enabling paranoia mode causes nscd to restart itself periodi‐
71 cally.
72 restart-interval time
74 Sets the restart interval to time seconds if periodic restart is
75 enabled by enabling paranoia mode.
76 persistent service <yes|no>
78 Keep the content of the cache for service over server restarts;
79 useful when paranoia mode is set.
80 shared service <yes|no>
82 The memory mapping of the nscd databases for service is shared
83 with the clients so that they can directly search in them
84 instead of having to ask the daemon over the socket each time a
85 lookup is performed.
86 max-db-size service number-of-bytes
88 The maximum allowable size for the service.
89 auto-propagate service <yes|no>
91 When set to no for passwd or group service, then the .byname
92 requests are not added to passwd.byuid or group.bygid cache.
93 This may help for tables containing multiple records for the
94 same id.
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97 nscd(8)
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100 This page is part of release 3.25 of the Linux man-pages project. A
101 description of the project, and information about reporting bugs, can
102 be found at http://www.kernel.org/doc/man-pages/.
103GNU 1999-10-01 NSCD.CONF(5)