Knowing free mdb space

Hello, I have recently migrated my openldap server from hdb to mdb. In this kind of database you configure the maximal database size with maxsize option. Although I have configure this option with 8GB, more than the double of my actual database size, I would like to know if there is any way to calculate the remaining size. According to [1] you can get the actual size with a du. But my problem is that I'm using zfs with a compressed file system, so du reports the compressed size, not the real one. Is there any way to get this value? Or my real maximum size is 8GB after compression? [1] https://wiki.zimbra.com/wiki/OpenLDAP_Performance_Tuning_8.0 -- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868887590 Fax: 868888337