problem with openldap 1.2.11-15

[francesco tornieri <francesco.tornieri@duke.it>]

I have some problems with openldap 1.2.11-15:
-when server has more than 1000 connections it refused to accept other      
connections
-sometimes  'sldap' process hold 99.9% CPU and so i must restart service
-warning: cannot open /etc/hosts.deny: Too many open files (i looking for it 
in archive of mail but i'm able to resolve this problem).
I put in my slapd.conf this entries:
sizelimit 3000
I used Red Hat 7.2 with kernel 2.4.7-10. Have you some ideas?
Best Regards, Francesco