Full_Name: Sumith Narayanan
OS: MacOSX 10.4
Submission from: (NULL) (18.104.22.168)
There are two known memory leaks related to syncrepl and one related to ACL
sets in 2.3.x releases since 2.3.27. Your 2.3.27 is quite old, the current 2.3
There are no known leaks related to the loglevel though. That sounds more like
a memory leak in your platform's C library, in the syslog() function. You
would need to use a malloc debugger to verify that.
My openLDAP DB is divided into 3 physical DBs, each of 4 GB , 12 GB
and 26 GB
sizes , 42 GB total.
We were running with ldbm backend till 6-7 months back when the total size of
the DB was below 30 GB. It started crashing once in a while as the size started
We then changed the backend to Berkeley DB (Version:4.4.20) and the openLDAP
version 2.3.27. It is running in a 8 GB memory machine with 32 bit processing
and receives updates through an custom interface which binds to ldap and do the
update / inserts and deletes.
The rate at which the updates/inserts/deletes come is around 1-2 K / hr.
Now when I start the slapd process in loglevel 256 or 512 , it starts crashing
with in a few hours running out of memory. The maximum memory that 32 bit
processor can use is around 2 GB. It crashes after that. I was trying to tune
the DB_CONFIG :
DB_CONFIG settings for each DB :
For 26 GB DB.
set_cachesize 0 42428800 0
# Transaction Log settings
For 12GB DB
set_cachesize 0 15485760 0
for 4 GB DB
set_cachesize 0 10485760 0
Slapd.conf settings :
These parameters are set same for all the three DBs :
There is a replica also which gets updates from the master.
Now when I change the loglevel to 32 or 16 , the process lives longer ,
sometimes for a week or for more than a month.... However , as soon as I switch
back to old loglevel , it starts crashing. This is happening in both master and
Could you please advice whether there is a fix for this in the current version
or is it getting fixed in the coming version OR is it something that I can fix
by configuring. Logs are important for us as we need to know where the requests
are coming from. Also , the DB is accessed 250 K times in a day approximately.
Please let me know if I need to furnish any more details.
-- Howard Chu
Chief Architect, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/