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Re: (ITS#8146) Slapd with mdb consumes 100% CPU if deref aliases is requested

Andrew Findlay wrote:
> On Mon, May 18, 2015 at 04:48:13PM +0100, Howard Chu wrote:
>
>>      ITS#8103 fix crash with more than 65535 aliases in a scope
>
> Ah - my test case does not have any aliases at all so it may be an
> unrelated issue.

I see, your issue is caused by the fact you haven't indexed the objectClass 
attribute. When back-mdb does a search to find all the alias objects in the 
DB, instead of returning zero, it returns unknown which causes it to loop 
through all possible entryIDs looking for alias entries.

(On my laptop, "all possible" is 2^64 - 1 so yes, this will spin for .. a while.)

-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/