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On Thursday, 2016-04-07 at 10:13 +0100, Ruediger Meier wrote:
Hm, my interpretation was wrong. To get meaningful stats you need to set
shared xyz no
Let's try:
AmonLanc:~ # grep shared /etc/nscd.conf
# shared <service> <yes|no>
shared passwd no
shared group no
shared hosts yes
shared services yes
shared netgroup yes
AmonLanc:~ #
It can only count stats if accesssed via socket but not if other
processes are reading directly in nscd's memory.
I really wondered about the low hit rates because any process who needs
to convert uids into user names (like ls -l) should use nscd's passwd
table rather than parsing /etc/passwd again and again or even worse
asking the ldap or NIS server. This is IMO the most notable speedup.
host caching is less useful.
Surely ls -l only needs to do this just once per different uid, not once
per file?
This is what I have after 10 minutes now
$ nscd -g | grep "hit\|cache:"
After doing two "ls -l":
AmonLanc:~ # nscd -g | grep "hit\|cache:"
passwd cache:
2 cache hits on positive entries
0 cache hits on negative entries
0% cache hit rate
group cache:
3 cache hits on positive entries
0 cache hits on negative entries
0% cache hit rate
hosts cache:
0 cache hits on positive entries
0 cache hits on negative entries
0% cache hit rate
services cache:
0 cache hits on positive entries
0 cache hits on negative entries
0% cache hit rate
netgroup cache:
0 cache hits on positive entries
0 cache hits on negative entries
0% cache hit rate
AmonLanc:~ #
What happens if shared=yes, does it still work, but report fais to say
so?
What other effects has shared=no?
- --
Cheers,
Carlos E. R.
(from 13.1 x86_64 "Bottle" at Telcontar)
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