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Re: slapindex performance?
Quanah Gibson-Mount wrote:
--On Friday, February 24, 2006 7:52 PM -0800 Krishna Sivaramapuram
I'm trying to reindex my slapd database (bdb) since I added one more
equality index. My db has more than 6M entries. I'm trying to see how
long this will take... I didn't find any proper reference in the web.
anyone done something similar and have any performance data on
What version of OpenLDAP are you using?
I would suggest (of course) OpenLDAP 2.3. In OpenLDAP 2.3, there are
two things that massively improve the speed of slapindex (which is
slower than slapadd in all previous releases). They are:
The "-q" option, to run it via "quick"
The ability to set "tool-threads", which will allow slapindex to use
multiple CPU's while indexing your DB.
Also, if you are adding a brand new index, there is no need to
re-index all your existing indices. You only need to index what is
new, which will also speed up slapindex. I.e.,
edit slapd.conf, commenting out all indices except the new one(s).
Run slapindex -q with an appropriate amount of tool-threads (1 per
CPU, so on a 2 CPU system, tool-threads 2, etc)
After it is done, edit slapd.conf, uncommenting your pre-existing
Or, using 2.3, just add the index to cn=config and let the database
update itself automatically.
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc
OpenLDAP Core Team http://www.openldap.org/project/