dovecot 2.2.36.4 problem with ulimit

[Urban Loesch]

Hi,

perhaps this?

 > with new debian9:
 > open files                      (-n) 1024

Regards
Urban


Am 16.09.20 um 12:57 schrieb Maciej Milaszewski:
> Hi
> Limits:
> 
> Where all working fine:
> 
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 257970
> max locked memory       (kbytes, -l) 64
> max memory size         (kbytes, -m) unlimited
> open files                      (-n) 65536
> 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) 257970
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited
> 
> 
> with new debian9:
> 
> core file size          (blocks, -c) 0
> data seg size           (kbytes, -d) unlimited
> scheduling priority             (-e) 0
> file size               (blocks, -f) unlimited
> pending signals                 (-i) 257577
> 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) 257577
> virtual memory          (kbytes, -v) unlimited
> file locks                      (-x) unlimited
> 
> 
> maby systemd "something has changed"
> 
> and add:
> 
> echo "kernel.pid_max = 50000" >> /etc/sysctl.conf
> sysctl -p
> systemctl edit dovecot.service
> 
> [Service]
> TasksMax=40000
> systemctl daemon-reload
> systemctl restart dovecot.service
> 
> cat /sys/fs/cgroup/pids/system.slice/dovecot.service/pids.max
> 
> 
> Any idea ?
> 
> On 16.09.2020 09:45, Maciej Milaszewski wrote:
>> Hi
>> I update os from debian8 to debian9
>>
>> # 2.2.36.4 (baf9232c1): /etc/dovecot/dovecot.conf
>> # Pigeonhole version 0.4.24.2 (aaba65b7)
>> # OS: Linux 4.9.0-13-amd64 x86_64 Debian 9.13
>>
>> All works fine but sometimes I get:
>>
>> Sep 16 09:17:00 dovecot4 dovecot: master: Error: service(pop3): fork()
>> failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:00 dovecot4 dovecot: master: Error: service(imap): fork()
>> failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:00 dovecot4 dovecot: master: Error: service(doveadm):
>> fork() failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:02 dovecot4 dovecot: master: Error: service(doveadm):
>> fork() failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:02 dovecot4 dovecot: master: Error: service(pop3): fork()
>> failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:02 dovecot4 dovecot: master: Error: service(imap): fork()
>> failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>> Sep 16 09:17:04 dovecot4 dovecot: master: Error: service(imap): fork()
>> failed: Resource temporarily unavailable (ulimit -u 257577 reached?)
>>
>> Other dovecot is debian8 and problem not exists - any idea ?