"calloc of 1280527935 elems of 4 bytes failed" -- this started happening recently. I've been looking around in your archives. I'm using Redhat 6.1 and openldap 1.2.10. I'm invoking slapd from root and it's looking like there's no limit set for the memory. The system has 128M ram and 256M swap space. Could anyone there please drop a hint where I can go with this problem?