Univention Bugzilla – Bug 23762
Join von Managed Clients wird durch passwordcache und faillog erheblich gebremst
Last modified: 2015-11-17 08:50:22 CET
In einer Teststellung eines Kunden mit einer erheblich großen Anzahl Useraccounts (50T+) dauert der Joinvorgang bei den Modulen passwordcache und faillog erheblich lange (1 Stunde+, exakte Zeit wurde nicht ermittelt, da vorzeitig abgebrochen).
Happened again in a UCS@school environment: - UDL iterates through each cache entry and invokes "faillog" to remove it from the module list - every single change is fsync()ed. src/change.c: 92 »···/* remove old entries for module */ 93 »···univention_debug(UV_DEBUG_LISTENER, UV_DEBUG_INFO, 94 »···»···»···"remove old entries for module %s", handler->name); 95 »···for (rv=cache_first_entry(&dbc_cur, &dn, &cache_entry); rv != DB_NOTFOUND; 96 »···»···»···rv=cache_next_entry(&dbc_cur, &dn, &cache_entry)) { 97 »···»···if (rv == -1) continue; 98 »···»···if (rv < 0) break; 99 100 »···»···cache_entry_module_remove(&cache_entry, handler->name); 101 »···»···cache_update_or_deleteifunused_entry(0, dn, &cache_entry); 102 »···»···cache_free_entry(&dn, &cache_entry); 103 »···} # univention-ldapsearch -LLLo ldif-wrap=no dn | grep -c ^dn 32253 Temporarily solved by putting the UDL cache in a tmpfs: cd /var/lib/univention-directory-listener mkdir TEST mount -t tmpfs -o size=1G udl TEST cp -pr cache.db cache.db.lock notifier_id handlers TEST/ /usr/sbin/univention-directory-listener ... -c TEST/ ... rsync -a TESTS/ ./ umount ./TEST
Ticket#2015110421000101 Customer system also suffered from this.
I guess ticket from comment #1 is 2015110221000211
Again at Ticket#2015111621000418
*** This bug has been marked as a duplicate of bug 39957 ***