Re: OpenLDAP + RHEL4 - time to time database crash (BDB backend)

[Dusty Doris <openldap@mail.doris.cc>]

> I found out a few things that might cause the problem but I do not
> have enough experience to judge which one is the most likely:
> - bdb database tuning, meaning I should configure checkpointing,
> cachesize, idlcachesize etc. - I'll refer to faq-o-matic for some
> clues about the possible values;
> - running db_checkpoint (uid same as slapd's uid) (but how often?)

I am using 2.3.7 but here is my configs for bdb tuning.

checkpoint, cachesize, idlcachesize goes slapd.conf.  Don't need to run 
db_checkpoint manually.

cachesize	50000
idlcachesize	150000
checkpoint	1024 5
(that says to flush to disk every 1M or 5 minutes)


Berkely DB environment goes in DB_CONFIG in your bdb directory
  ie: /var/db/openldap-data

set_cachesize 0 536870912 1
set_lg_regionmax 1048576
set_lg_bsize 2097152
set_lg_max 10485760
set_flags DB_LOG_AUTOREMOVE

(Note DB_LOG_AUTOREMOVE only works if using bdb 4.2 w/ the supplied patch 
by openldap or bdb 4.3)