openldap-data log files

Every now and then we rewrite all the users general information (phone, email, title, etc...) from a data dump we get from our ERP. This has caused so many log files to be created in /var/db/openldap/openldap-data that the boot volume has filled up. OD servers don't do well with a full hard drive so I need to know if I can delete these files (or at least the older ones). Anyone know if this is ok to do? I already have a script that checks the hard drive space and will run the appropriate commands if the hard drive starts to get close to full. The problem is that I don't know what's safe to delete. I've deleted all the log files before but then the slapd won't launch and the slapd.log file shows errors about missing log files.