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Re: (ITS#7432) slapd crashes when removing members from a large group

hyc@symas.com wrote:
> marvin.mundry@uni-hamburg.de wrote:
>> Full_Name: Marvin Mundry
>> Version: 2.4.33
>> OS: Ubuntu 12.10
>> URL: https://idmswiki.rrz.uni-hamburg.de:8005/debug.tar.bz
>> Submission from: (NULL) (134.100.2.183)
>>
>
> Thanks for the report. The crash has been fixed in git, but your test runs
> into another (known) issue in MDB.
>
> You're working with a very large entry, which libmdb stores in overflow pages.
> In the current version of libmdb, freespace management for overflow pages is
> not fully implemented, so every time you update the entry libmdb will always
> use new pages (instead of reusing old pages). Thus, after a few hundred
> operations, your 1GB map will be exhausted.
>
> It looks like you won't be able to use back-mdb until this feature is fully
> implemented in libmdb.

The overflow page freespace management issue is being addressed in ITS#7455. A 
patch is currently being tested.

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