<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:garamond,new york,times,serif;font-size:10pt"><div>Ok after many many tests, the imapd service use all the CPU only when an user use the horde webmail....<br>Any solution??<br></div><div style="font-family: garamond,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">Da:</span></b> Gabriele Di Giambelardini <gabriele_d_g@yahoo.it><br><b><span style="font-weight: bold;">A:</span></b> Ingo Steuwer <steuwer@univention.de>; kolab-users@kolab.org<br><b><span style="font-weight: bold;">Inviato:</span></b> Venerdì 24 ottobre 2008, 9:17:55<br><b><span style="font-weight: bold;">Oggetto:</span></b> Re: kolab 2.2<br></font><br><div style="font-family: times new roman,new york,times,serif; font-size:
10pt;"><div>Thanks, But I don't know the why in my htop I see the imap have a 100% of CPU... <br>There is some parameter or something I should do ??<br>thanks <br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 13px;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">Da:</span></b> Ingo Steuwer <steuwer@univention.de><br><b><span style="font-weight: bold;">A:</span></b> kolab-users@kolab.org<br><b><span style="font-weight: bold;">Cc:</span></b> Gabriele Di Giambelardini <gabriele_d_g@yahoo.it><br><b><span style="font-weight: bold;">Inviato:</span></b> Venerdì 24 ottobre 2008, 8:34:26<br><b><span style="font-weight: bold;">Oggetto:</span></b> Re: kolab
2.2<br></font><br>Hi,<br><br>Am Donnerstag, 23. Oktober 2008 schrieb Gabriele Di Giambelardini:<br>> Hi to all, I have a big problem with kolab 2 performance.<br>> I have an server with 10 GB of RAM and about 150000 users.<br><br>Once they are imported into LDAP and the mail-spools are created, the pure <br>amount of users should not be the problem, but the number of current users <br>and the number/size of deliviered mails. We installed a kolab-based <br>mailserver with ~80000 users (mailaccounts) and Horde webmail on a far <br>smaller hardware (one server, 2GB RAM) years ago.<br><br>> After I imported the user in the kolab ldap the server become very very<br>> slow, it's impossible use a webmail. so I installed the webmail on other<br>> server with eaccelerator. But now on my main server the kolab imapd take<br>> all the CPU and every thing is too slow. The are some settings for imap of<br>> if somebody know the why of this
latency... THANKS<br><br>We [1] had trouble with cyrus and horde getting slow in large installations <br>because of a very inefficient group-ACL-computing of cyrus. In some cases it <br>helps to activate "nscd" with large cache sizes (mhm, I don't know if nscd is <br>part of a standard Kolab-distributon?), in other scenarios we deactivated <br>this in Cyrus' imapd.conf (unix_group_enable: no) - which is OK as long as <br>group ACLs are not required. But this might also be slightly different in <br>plain Kolab.<br><br>You should try to figure out what the imapd really does. Is it during a login, <br>mail-delivery, folder-operations etc.; maybe imapd is only waiting for <br>something else (Disk I/O, LDAP, ...)?<br><br>Regards<br>Ingo Steuwer<br><br>[1] Please note that we don't use the openpkg-distribution of kolab but a <br>derivated installation based on Debian with patches and configurations <br>similar to/derived from plain
kolab.<br><br>><br>><br>> Scopri il blog di Yahoo! Mail:<br>> Trucchi, novità e scrivi la tua opinione.<br>> <a rel="nofollow" target="_blank" href="http://www.ymailblogit.com/blog">http://www.ymailblogit.com/blog</a><br><br><br><br>-- <br>Ingo Steuwer Projektmanagement <a rel="nofollow" ymailto="mailto:steuwer@univention.de" target="_blank" href="mailto:steuwer@univention.de">steuwer@univention.de</a><br>Univention GmbH Linux for your Business fon: +49 421 22 232-43<br>Mary-Somerville-Str.1 28359 Bremen mob: +49 173 2112971<br> <a rel="nofollow" target="_blank" href="http://www.univention.de">http://www.univention.de</a> fax: +49 421 22
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