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Re: ACI is slowing down searches
Quanah,
Quanah Gibson-Mount <quanah@stanford.edu> writes:
> --On Wednesday, September 10, 2003 4:51 PM +0200 Dieter Kluenter
> <dieter@dkluenter.de> wrote:
>
>> Hi,
>> my test environment on a single host:
>> two severs each with 20,000 entries under ou=benchmark subtree
>> Authentication by gssapi
>>
>> OpenLDAP-2.2alpa
>> dabase hdb
>> entries in the subtree "ou=benchmark,o=kluenter" have fowllowing aci
>>
>> openLDAPaci:1.3.6.1.4.1.14658.3.1#entry#grant;r,w,s,c;[all]#group#cn=Admi
>> nistratoren,o=kluenter
>>
>> OpenLDAP-2.1.19
>> database bdb
>>
>> entries in the subtree "ou=benchmark,o=avci,c=de" are controlled by
>> following acl
>> access to dn.subtree="ou=benchmark,o=avci,c=de"
>> by group="cn=Administratoren,o=avci,c=de" write
>>
>> OpenLDAP-2.2alpha
>> search on aci controlled subtree
>> time ldapsearch -h marin.avci.de:4899 -b "ou=benchmark,o=kluenter"
>> uid=13457 mail
>>
>> real 0m0.879s
>> user 0m0.050s
>> sys 0m0.030s
>>
>> OpenLDAP-2.1.19
>> search on acl controlled subtree
>> time ldapsearch -h marin.avci.de:389 -b "ou=benchmark,o=avci,c=de"
>> uid=13457 mail
>>
>> real 0m0.164s
>> user 0m0.040s
>> sys 0m0.030s
>>
>> The time values are randomly picked from the results of 1,000 searches
>> each (2 searches per sec).
>> Can anybody confirm the measured results?
> I noticed a definite slowdown in search speed using hdb vs. bdb in my
> 2.2 alpha testing as well. I've chatted with Howard about it, and he
> has some ideas on how to increase the lookup speed. I expect that
> later 2.2 releases will have better performance.
I've just deleted the hdb database and created a bdb database, the
encrease in performance is astonishing.
time ldapsearch -h marin.avci.de:4899 -b "ou=benchmark,o=kluenter"
sn=9218 mail
real 0m0.159s
user 0m0.040s
sys 0m0.050s
-Dieter
--
Dieter Kluenter | Systemberatung
Tel:040.64861967 | Fax: 040.64891521
mailto: dkluenter(at)dkluenter.de
http://www.avci.de