Hello all,
I hope someone can help me, I have been testing out Dovecot to switch from
popa3d which I use at the moment. When I get several users connecting and
disconnection multiple times, the Dovecot process with command Auth uses
50-90% of the CPU for the period which they are connecting. I am wondering
if there is something that I may have misconfigured, or if there is
something that I can change so that this spike doesn't occur.
If anyone could shed some light on the issue, I would appreciate it,
Kevin
/var/mail# dovecot -n
# 2.1.4: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-33-generic-pae i686 Ubuntu 10.04.4 LTS ext4
auth_cache_size = 10 M
auth_verbose = yes
disable_plaintext_auth = no
instance_name = Mail Popper 1
listen = 172.20.20.222
login_greeting = Mail Popper 1 Ready
mail_location = mbox:/var/empty:INBOX=/var/mail/%u:INDEX=MEMORY
mail_privileged_group = mail
namespace inbox {
inbox = yes
location mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix }
passdb {
driver = shadow
}
protocols = pop3
service pop3-login {
service_count = 0
}
ssl = no
userdb {
driver = passwd
}
protocol pop3 {
pop3_uidl_format = %08Xu%08Xv
}
Hello all,
I hope someone can help me, I have been testing out Dovecot to switch from
popa3d which I use at the moment. When I get several users connecting and
disconnection multiple times, the Dovecot process with command Auth uses
50-90% of the CPU for the period which they are connecting. I am wondering
if there is something that I may have misconfigured, or if there is
something that I can change so that this spike doesn't occur.
If anyone could shed some light on the issue, I would appreciate it,
Kevin
/var/mail# dovecot -n
# 2.1.4: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-33-generic-pae i686 Ubuntu 10.04.4 LTS ext4
auth_cache_size = 10 M
auth_verbose = yes
disable_plaintext_auth = no
instance_name = Mail Popper 1
listen = 172.20.20.222
login_greeting = Mail Popper 1 Ready
mail_location = mbox:/var/empty:INBOX=/var/mail/%u:INDEX=MEMORY
mail_privileged_group = mail
namespace inbox {
inbox = yes
location mailbox Drafts {
special_use = \Drafts
}
mailbox Junk {
special_use = \Junk
}
mailbox Sent {
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
special_use = \Trash
}
prefix }
passdb {
driver = shadow
}
protocols = pop3
service pop3-login {
service_count = 0
}
ssl = no
userdb {
driver = passwd
}
protocol pop3 {
pop3_uidl_format = %08Xu%08Xv
}
On 12.4.2012, at 23.46, Root Kev wrote:> I hope someone can help me, I have been testing out Dovecot to switch from > popa3d which I use at the moment. When I get several users connecting and > disconnection multiple times, the Dovecot process with command Auth uses > 50-90% of the CPU for the period which they are connecting. I am wondering > if there is something that I may have misconfigured, or if there is > something that I can change so that this spike doesn't occur.So is it the "auth" process or "auth worker" process? What if you add:> passdb { > driver = shadow > } > userdb { > driver = passwdargs = blocking=yes> }does that move the CPU usage from "auth" to "auth worker" process? Is it using /etc/shadow and /etc/passwd files? Are they large? Do you have enabled other weird stuff in /etc/nsswitch.conf (and were there some other files related to them as well?)