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Re: lots of write slowing down searches
Patrick Radtke wrote:
We have some software that occasionally likes to make lots of
modifications and adds to OpenLDAP in a short amount of time (5
modification per sec for a period of 10 minutes).
When ever this happens all ldapsearches become very slow (servers
handle about 16 searches per second normally). They take upwards of 2
seconds where previously the were taking 0.05s to answer requests.
This causes us various problems with log-ins and email lookups.
We are running 2.1.30, but I ran tests on 2.2.19 and had the same issues.
we use lbdm as our backend and our indexes are for the standard stuff
for unix accounts and groups
I understand that OpenLDAP is read optimized but I am wondering if
switching to BDB would provide significantly better search speeds when
writes are occurring (ie enough to solve the problem)?
Yes. back-bdb is literally thousdands of times better than back-ldbm in
a scenario like this.
-- Howard Chu
Chief Architect, Symas Corp. Director, Highland Sun
Symas: Premier OpenSource Development and Support