dpkg -l slapd
ii slapd2.4.39-1 amd64
OpenLDAP server (slapd)
Test script, run from another system:
for i in `seq 2048`; do ldapsearch -x -H
ldaps://ldapm1.test.realityfailure.org -b
ou=people,dc=test,dc=realityfailure,dc=org done 21 | grep -i sasl
Perhaps some of this background information will be useful:
We did not see this issue in slapd 2.4.23-7.3, in squeeze.
The number of unique entries in the LDAP database do not appear to
affect where it starts dropping connections, as we've tested with 2 to
over 500 unique accounts.
The number
Package: slapd
Version: 2.4.31-1+nmu2
Placing the slapd server under load, at somewhere between 512 and 1024
simultaneous connections (using TLS, may be higher unencrypted), you
will end up see variations of:
ldap_sasl_bind(SIMPLE): Can't contact LDAP server (-1)
Under simple tests, I've seen
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