Aw: Re: Lmtp Memory Limit

[Aki Tuomi]

Hi.

268435456 / 1024 / 1024 = 256M not 256K. These are Bytes not Bits.

Aki


On 15.01.2018 12:02, Thomas Manninger wrote:
> Hi,
>  
> thanks for your response!
>  
> Now, i already solved the problem, but it's possible a bug?
>  
> If i use the default values:
> default_vsz_limit = 256M
> service lmtp {
>   vsz_limit = $default_vsz_limit
> }
>  
> After restart, i check the limits of the lmtp process:
> Max data size             268435456          268435456          bytes     
>  
> The limit is 256KB instead of 256MB?
>  
> If i change the value to 512MB, the process limit is 512KB.
>  
> When i set "20000M" as limit, the process limit is really 20000MB.
>  
> I am using CentOS 7.4. and dovecot 2.2.33.2 (d6601f4ec).
>  
> Who is parseing the values from the unit (MB) to Bytes? Dovecot or a
> linux libary function??
>
> Best regards,
> Thomas Manninger
> *Gesendet:* Montag, 15. Januar 2018 um 08:16 Uhr
> *Von:* "Aki Tuomi" <aki.tuomi at dovecot.fi>
> *An:* "Thomas Manninger" <DBGTMaster at gmx.at>, Dovecot at dovecot.org
> *Betreff:* Re: Lmtp Memory Limit
>
>
> On 14.01.2018 09:11, Thomas Manninger wrote:
> > Hi,
> >
> > i am using dovecot 2.2.33.2 on CentOS 7.4.
> >
> > Since i upgraded from CentOS 7.2. to CentOS 7.4. (without upgrading
> dovecot), my dovecot sieve-pipe scripts crash with Out of memory:
> > Out of memory (allocated 262144) (tried to allocate 8793 bytes)
> >
> > There are some memory limits in dovecot or sieve? Can i change this
> value?
> >
> > Kernel limitks:
> > [root at xxx software]# ulimit -a
> > core file size (blocks, -c) 0
> > data seg size (kbytes, -d) unlimited
> > scheduling priority (-e) 0
> > file size (blocks, -f) unlimited
> > pending signals (-i) 26505
> > max locked memory (kbytes, -l) 64
> > max memory size (kbytes, -m) unlimited
> > open files (-n) 1024
> > pipe size (512 bytes, -p) 8
> > POSIX message queues (bytes, -q) 819200
> > real-time priority (-r) 0
> > stack size (kbytes, -s) 8192
> > cpu time (seconds, -t) unlimited
> > max user processes (-u) 26505
> > virtual memory (kbytes, -v) unlimited
> > file locks (-x) unlimited
> >
> >
> > Dovecot is running as user mail:
> > su mail
> > bash-4.2$ ulimit -a
> > core file size (blocks, -c) 0
> > data seg size (kbytes, -d) unlimited
> > scheduling priority (-e) 0
> > file size (blocks, -f) unlimited
> > pending signals (-i) 26505
> > max locked memory (kbytes, -l) 64
> > max memory size (kbytes, -m) unlimited
> > open files (-n) 1024
> > pipe size (512 bytes, -p) 8
> > POSIX message queues (bytes, -q) 819200
> > real-time priority (-r) 0
> > stack size (kbytes, -s) 8192
> > cpu time (seconds, -t) unlimited
> > max user processes (-u) 4096
> > virtual memory (kbytes, -v) unlimited
> > file locks (-x) unlimited
> >
> > Can someone help me?
> >
> > Thanks for help!
> >
> > Best regards
> > Thomas Manninger
>
> Check 'doveconf service/lmtp' for dovecot imposed limits. If vsz_limit
> is 18446744073709551615, it means default_vsz_limit is used. Check out
> 'doveconf default_vsz_limit'. You can then decide if you want to set
> some limit for lmtp only or increase the default limit.
>  
> Aki

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