Drawbacks of Berkeley DB cache settings?

[Chris van der Merwe <chris@arnes.si>]

I'm wondering if anyone on the list is familiar with the 
"inner-workings" of the BDB, specifically my question is: Does enlarging 
the cache of the BDB via DB_CONFIG pose any danger of updates to the 
directory being lost in the event of a powerfailure or crash? I ask 
because I've managed to greatly improve the results from OpenLDAP by 
making some fairly large cache settings and I'm wondering if BDB has 
some mechanism to prevent corruption in the event of a crash (with a 
large un-processed write buffer).

Thanks
 Chris