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http://issues.apache.org/jira/browse/DIRSERVER-629?page=comments#action_12414494
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Alex Karasulu commented on DIRSERVER-629:
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This is horrible. Here's what I propose we do:
(1) Branch the 1.0 branch (new branch is optimizaion) and the shared-ldap code.
(2) Replace all Strings that pump in a DN into the backend interface with your
new LdapDN class which has both the
normalized DN and the user provided DN.
(3) Change comparator on ndn index to use a String.equals() for now. This is
the easiest way to get an immediate
impact. The comparator for the updn must still be a normalizing since
there is nothing we can do about it. However we
do not use the UPDN for searching based on scope so it will not hurt us.
(4) Rerun perfromance metrics and check the improvement
If these enhancements do not solve this problem we have to re-evaulate the
default backend design.
WDYT?
> Improve performance for search requests
> ---------------------------------------
>
> Key: DIRSERVER-629
> URL: http://issues.apache.org/jira/browse/DIRSERVER-629
> Project: Directory ApacheDS
> Type: Improvement
> Versions: 1.0-RC3
> Reporter: Emmanuel Lecharny
> Priority: Critical
> Fix For: 1.0-RC4
> Attachments: apacheds-SEARCH.log
>
> Search requests are pathological long when the server is loaded with entries.
> I have a server with 10000 entries, and I do a search for a random user. It
> takes around 50 ms to find the user (20 searches per second, maximum).
> This is due to the fact that, when we have a lot of entries, the search look
> for entries which DN are all parsed (cf attached log). The parser is
> synchronized and takes around 0,5 ms to parse a DN, and the entries to be
> parse are 100 (cf attached log again), so the 50 ms are spent parsing,
> parsing and parsing ...
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