[Dovecot] Possibly dumb questions about DC and user/system limits

[Stewart Dean]

Maybe it's a D'uh for everyone else, but the reason I wasn't getting 
anywhere when I increased the no_size and no_size_hard (and confirmed 
that it had changed using the lsuser cmd) was that a) it needed to be 
done against root, not dovecot and b) I had to exit root and re-login 
for that to be part of root environment instance.  Indeed, before going 
out and coming back, ulimit -n did still show 2000.  So lsuser shows the 
configuration and ulimit shows the current environment.  All better 
until the next time.

I was also interested to learn, while I was looking under rocks here and 
there, that in AIX with a 64 bit kernel there is total number of files 
that can be in use by all users of ~3,355,236.  Wouldn't it be nasty to 
bump into that!

Jonathan Siegle wrote:
>
> On May 14, 2009, at 2:17 PM, Stewart Dean wrote:
>
>>
>>
>> The only changes was that max_mail_processes went from 1024 to 1280.  
>> Now I get a error message when I start DC:
>>
>> Warning: fd limit 2000 is lower than what Dovecot can use under full 
>> load (more than 2054). Either grow the limit or change 
>> login_max_processes_count and max_mail_processes settings
>>
>> So I changed the no_size and no_size_hard to 3500 and 4000 
>> respectively in both dovecot and root
>>
>> AIX defines nosize:* *Sets the soft limit for the number of file 
>> descriptors a user process may have open at one time.
>>
>
> I found a way to recreate the problem on my side. Since I start 
> dovecot from inetd, I must verify my shell has the proper ulimits then 
> do stopsrc -s inetd;startsrc -s inetd to pick up the new ulimits. I 
> didn't notice how you started dovecot. Maybe this helps.
>
>

-- 
==== Once upon a time, the Internet was a friendly, 
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Now it's like an apartment in Bed-Stuy: you need three heavy duty 
pick-proof locks, one of those braces that goes from the lock to the 
floor, and bars on the windows.... ==== Stewart Dean, Unix System Admin, 
Bard College, New York 12504 sdean at bard.edu voice: 845-758-7475, fax: 
845-758-7035