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According to the link you sent, each instance of your application
is trying to send 512 simultanoeus requests to slapd:

        perl load-test.pl --server=server-name --num-forks=512

since slapd cannot handle more than 1024 file descriptors (as far
as I know, because of an intrinsic limitation in glibc's select)
you're likely to be exausting system resources.  The core dump
you're showing is meaningless to me, because it shows the error
occurring in an obscure and generic internal of glibc rather than
in some specific part of slapd, starting from generic low level I/O
routines of libldap.  Can you reproduce the problem with a more
limited load?


Pierangelo Masarati

Pierangelo Masarati

    SysNet - via Dossi,8 27100 Pavia Tel: +390382573859 Fax: +390382476497