we have ejabberd 2.1.11 + ldap(communigate) + ~2100 users + mod_shared_roster_ldap.
i see strange rate of connections with ejabberd.
when at one moment of time some decades of users try to connect to ejabberd, it takes on approximately 15-18 users quickly and much slowly takes on another users with huge delay between acceptions of connetcions.
users gets "connection timeout to server".
in server log after some time i see "ldap connection timeout"
when users try to connect, i don't see them tries in logs, but netstat shows their tcp connection to server.
i did turn off all max_stanza_size and all shapers in config, but problem persist as in beginning.
what setting in ejabberd server makes connection rate?