dovecot 2.2.36.4 problem with ulimit
Urban Loesch
bind at enas.net
Wed Sep 16 15:17:50 EEST 2020
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 ?
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