Re: dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes

[absolutely_free]

Hi,

this is now:

service imap {
# Most of the memory goes to mmap()ing files. You may need to increase this
# limit if you have huge mailboxes.
#vsz_limit = $default_vsz_limit

# Max. number of IMAP processes (connections)
process_limit = 1024
}

This was before:

service imap {
# Most of the memory goes to mmap()ing files. You may need to increase this
# limit if you have huge mailboxes.
#vsz_limit = $default_vsz_limit

# Max. number of IMAP processes (connections)
#process_limit = 1024
}


> Il 5 ottobre 2017 alle 21.28 Sami Ketola <sami.ket...@dovecot.fi> ha scritto:
> 
> 
> 
> > On 5 Oct 2017, at 22.16, absolutely_f...@libero.it wrote:
> > 
> > Hi,
> > 
> > I am using Dovecot 2.2.32 (dfbe293d4)
> > 
> > I noticed lots of messages like:
> > 
> > dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes
> > 
> > in /var/log/maillog
> > 
> > I commented out "process_limit"
> > 
> > 
> > service imap {
> > # Most of the memory goes to mmap()ing files. You may need to increase this
> > # limit if you have huge mailboxes.
> > #vsz_limit = $default_vsz_limit
> > 
> > # Max. number of IMAP processes (connections)
> > process_limit = 1024
> > }
> > 
> > 
> > but it seems that value doesn't change (still 100).
> > 
> > Any suggestions?
> > 
> > Thank you very much!
> 
> 
> So you just commented it out?
> 
> so then it’s using the default_process_limit:
> # doveconf -d | grep default_process_limit
> default_process_limit = 100
> 
> which is 100.
> 
> Sami

Re: dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes

[Sami Ketola]

> On 5 Oct 2017, at 22.16, absolutely_f...@libero.it wrote:
> 
> Hi,
> 
> I am using Dovecot 2.2.32 (dfbe293d4)
> 
> I noticed lots of messages like:
> 
> dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes
> 
> in /var/log/maillog
> 
> I commented out "process_limit"
> 
> 
> service imap {
> # Most of the memory goes to mmap()ing files. You may need to increase this
> # limit if you have huge mailboxes.
> #vsz_limit = $default_vsz_limit
> 
> # Max. number of IMAP processes (connections)
> process_limit = 1024
> }
> 
> 
> but it seems that value doesn't change (still 100).
> 
> Any suggestions?
> 
> Thank you very much!


So you just commented it out?

so then it’s using the default_process_limit:
# doveconf -d | grep default_process_limit
default_process_limit = 100

which is 100.

Sami

dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes

[absolutely_free]

Hi,

I am using Dovecot 2.2.32 (dfbe293d4)

I noticed lots of messages like:

dovecot: master: Warning: Sent SIGKILL to 100 imap-login processes

in /var/log/maillog

I commented out "process_limit"


service imap {
# Most of the memory goes to mmap()ing files. You may need to increase this
# limit if you have huge mailboxes.
#vsz_limit = $default_vsz_limit

# Max. number of IMAP processes (connections)
process_limit = 1024
}


but it seems that value doesn't change (still 100).

Any suggestions?

Thank you very much!

Re: Warning: Sent SIGKILL to 100 imap-login processes

[Aki Tuomi]

On 18.10.2016 11:47, Ximo Mira wrote:
> Hi, 
>
> Last night we tried a traffic bypass in an existing mail environment before 
> migration to new Dovecot backend platfom using Dovecot proxy. We are using an 
> LDAP value for checking the proxy host of the user. 
>
> POP traffic was running flawlessly, but IMAP connections started to drop when 
> few clients connected: 
>
> Oct 17 22 :26:51 master: Warning: Sent SIGKILL to 100 imap-login processes 
>
> There are hundreds of these lines, always between 99 and 100 processes. Looks 
> like some kind of limit, but not sure if its related to the Dovecot proxy 
> machines (pool of 3 in total) or the final destination (the same IMAP server 
> for +1 users). Concurrect IMAP connections may rise to around 2000. 
>
> Thanks. 

Hi!

You apparently have also opened support ticket about this?

Aki

Warning: Sent SIGKILL to 100 imap-login processes

[Ximo Mira]

Hi, 

Last night we tried a traffic bypass in an existing mail environment before 
migration to new Dovecot backend platfom using Dovecot proxy. We are using an 
LDAP value for checking the proxy host of the user. 

POP traffic was running flawlessly, but IMAP connections started to drop when 
few clients connected: 

Oct 17 22 :26:51 master: Warning: Sent SIGKILL to 100 imap-login processes 

There are hundreds of these lines, always between 99 and 100 processes. Looks 
like some kind of limit, but not sure if its related to the Dovecot proxy 
machines (pool of 3 in total) or the final destination (the same IMAP server 
for +1 users). Concurrect IMAP connections may rise to around 2000. 

Thanks.