On 13/06/2018 21:48, Albert Shih wrote:
Hi eveyone
I got a server (FreeBSD + Cyrusimap, 192Go) I need to reserve some RAM for the ZFS arc.
I would like to know how many Ram I need to run cyrus-imap.
I got on between 300-1600 connexion imap simultaneous (on my old server)
Through ps aux I see each imapd daemon use between 30Mo and.....300Mo. So
because this very large interval I'm unable to calculate.
Albert,
We have a dual socket Intel (2.8 GHz, 8 cores), 72 GB RAM server running
Cyrus 2.3 on
Solaris 10. It is very happy with 50-100 POP service instances and
5000-8000 IMAPDs
continuously in the system.
I seem to remember ZFS ARC takes all RAM it can get hold of, up to 50%
of total RAM.
Solaris 'prstat' shows typical size of an IMAPD process to be around 75
MB with an RSS
of 43 MB.
I recall the mailboxes.db size playing a role here. We have half a
million mailboxes.
Cordialement,
Eric.
Regards.
--
Albert SHIH
DIO bâtiment 15
Observatoire de Paris
5 Place Jules Janssen
92195 Meudon Cedex
France
☏ +33 1 45 07 76 26/+33 6 86 69 95 71
xmpp: jas@xxxxxxxx
Heure local/Local time:
Wed Jun 13 21:30:50 CEST 2018
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