[Dovecot] fd limit 1024 is lower in dovecot-1.1.1
zhbmaillistonly at gmail.com
Wed Jul 16 04:55:58 EEST 2008
Jack Stewart wrote:
> Zhang Huangbin wrote:
>> Daniel L. Miller wrote:
>>> Zhang Huangbin wrote:
>>>> Hi, all.
>>>> I just upgrade from 1.0.15 to 1.1.1 in a test box(RHEL 5.2, x86_64).
>>>> after upgrade, i got this warning msg:
>>>> ----8< ----
>>>> # /etc/init.d/dovecot restart
>>>> Stopping Dovecot Imap: [ OK ]
>>>> Starting Dovecot Imap: Warning: fd limit 1024 is lower than what
>>>> Dovecot can use under full load (more than 1280). Either grow the
>>>> limit or change login_max_processes_count and max_mail_processes
>>> I'm just guessing - but reading that warning it appears to me that
>>> Dovecot is saying that as it is configured, it can consume more O/S
>>> resources (I assume fd is "file descriptors") than the O/S is
>>> currently configured for. So you need to DECREASE your dovecot max
>>> processes to decrease the (potential) system demands - or increase
>>> your O/S settings.
>> I think so.
>> I just decrease the processes, it works now.
> Just as an FYI, for some versions of linux (i.e. RHE) you need to set
> the process limit - ulimit unlimited is not enough. 1024 is the
> default number of open file descriptors.
> One of the ways to solve this is by running 'ulimit -n X' in your init
> script before starting the program. Within RHE, another way is to
> configure /etc/security/limits.conf by putting something like this
> into the file:
> * hard locks 8192
> * hard nofile 8192
> * soft locks 4096
> * soft nofile 4096
> This allows for processes to run with 4096 file descriptors by default
> and the user process can increase it to 8192 via ulimit.
> /etc/security/limits.conf can also be configured on a per user basis
> which is also nice.
Thanks Jack. I will test it later. ^_^
I just comment the 'max_processes' variable in dovecot.conf now.
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