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Gerben Wierda

2023-Jan-06 22:20 UTC

replicator: Panic: data stack: Out of memory when allocating 268435496 bytes

How problematic is it to have

default_vsz_limit = 0

in dovecot.conf? macOS+MacPorts had this as a requirement even.

Gerben
> On 6 Jan 2023, at 16:49, Paul Kudla <paul at scom.ca> wrote:
> 
> 
> i ran into this as well
> 
> here is the full config for mine with replication
> 
> # cat dovecot.conf
> # 2.3.14 (cee3cbc0d): /usr/local/etc/dovecot/dovecot.conf
> # OS: FreeBSD 12.1-RELEASE amd64
> # Hostname: mail18.scom.ca
> 
> auth_debug = no
> auth_debug_passwords = no
> 
> default_process_limit = 16384
> 
> mail_debug = no
> 
> #lock_method = dotlock
> #mail_max_lock_timeout = 300s
> 
> #mbox_read_locks = dotlock
> #mbox_write_locks = dotlock
> 
> mmap_disable = yes
> dotlock_use_excl = no
> mail_fsync = always
> mail_nfs_storage = no
> mail_nfs_index = no
> 
> auth_mechanisms = plain login
> auth_verbose = yes
> base_dir = /data/dovecot/run/
> debug_log_path = syslog
> disable_plaintext_auth = no
> dsync_features = empty-header-workaround
> 
> info_log_path = syslog
> login_greeting = SCOM.CA Internet Services Inc. - Dovecot ready
> login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e
%c
> 
> 
> mail_location = maildir:~/
> 
> mail_plugins = " virtual notify replication fts fts_lucene "
> mail_prefetch_count = 20
> 
> protocols = imap pop3 lmtp sieve
> 
> 
> protocol lmtp {
>  mail_plugins = $mail_plugins sieve
>  postmaster_address > }
> 
> service lmtp {
>  process_limit=1000
>  vsz_limit = 512m
>  client_limit=1
>   unix_listener /usr/home/postfix.local/private/dovecot-lmtp {
>     group = postfix
>     mode = 0600
>     user = postfix
>  }
> }
> 
> protocol lda {
>  mail_plugins = $mail_plugins sieve
> }
> 
> service lda {
>  process_limit=1000
>  vsz_limit = 512m
> }
> 
> service imap {
>  process_limit=4096
>  vsz_limit = 2g
>  client_limit=1
> }
> 
> service pop3 {
>  process_limit=1000
>  vsz_limit = 512m
>  client_limit=1
> }
> 
> namespace inbox {
>  inbox = yes
>  location >  mailbox Drafts {
>    auto = subscribe
>    special_use = \Drafts
>  }
>  mailbox Sent {
>    auto = subscribe
>    special_use = \Sent
>  }
>  mailbox Trash {
>    auto = subscribe
>    special_use = \Trash
>  }
>  prefix >  separator = /
> }
> 
> passdb {
>  args = /usr/local/etc/dovecot/dovecot-pgsql.conf
>  driver = sql
> }
> 
> doveadm_port = 12345
> doveadm_password = secretxxxx
> 
> service doveadm {
>  process_limit = 0
>  process_min_avail = 0
>  idle_kill = 0
>  client_limit = 1
>  user = vmail
>  inet_listener {
>    port = 12345
>  }
> }
> 
> service config {
>  unix_listener config {
>    user = vmail
>    }
> }
> 
> dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u
> #dsync_remote_cmd = doveadm sync -d -u%u
> 
> replication_dsync_parameters = -d -N -l 300 -U
> 
> plugin {
>  mail_log_events = delete undelete expunge copy mailbox_delete
mailbox_rename
>  mail_log_fields = uid, box, msgid, from, subject, size, vsize, flags
>  push_notification_driver = dlog
> 
>  sieve = file:~/sieve;active=~/sieve/.dovecot.sieve
>  #sieve = ~/.dovecot.sieve
>  sieve_duplicate_default_period = 1h
>  sieve_duplicate_max_period = 1h
>  sieve_extensions = +duplicate +notify +imapflags +vacation-seconds
>  sieve_global_dir = /usr/local/etc/dovecot/sieve
>  sieve_before = /usr/local/etc/dovecot/sieve/duplicates.sieve
> 
> 
>  mail_replica = tcp:10.221.0.19:12345
>  #mail_replica = remote:vmail at 10.221.0.19
>  #replication_sync_timeout = 2
> 
>  fts = lucene
>  fts_lucene = whitespace_chars=@.
>        fts_autoindex = yes
>        fts_languages = en
> }
> 
> #sieve_extensions = vnd.dovecot.duplicate
> 
> #sieve_plugins = vnd.dovecot.duplicate
> 
> service anvil {
>  process_limit = 1
>  client_limit=5000
>  vsz_limit = 512m
>  unix_listener anvil {
>    group = vmail
>    mode = 0666
>  }
> }
> 
> service indexer-worker {
>        vsz_limit = 2g
> }
> 
> 
> 
> service auth {
>   process_limit = 1
>   client_limit=5000
>   vsz_limit = 1g
> 
>   unix_listener auth-userdb {
>      mode = 0660
>      user = vmail
>      group = vmail
>   }
>   unix_listener /var/spool/postfix/private/auth {
>      mode = 0666
>   }
> 
> }
> 
> service stats {
>  process_limit = 1000
>  vsz_limit = 1g
>  unix_listener stats-reader {
>    group = vmail
>    mode = 0666
>  }
>  unix_listener stats-writer {
>    group = vmail
>    mode = 0666
>  }
> }
> userdb {
>  args = /usr/local/etc/dovecot/dovecot-pgsql.conf
>  driver = sql
> 
> }
> 
> protocol imap {
>  mail_max_userip_connections = 50
>  mail_plugins = $mail_plugins notify replication
> }
> 
> protocol pop3 {
>  mail_max_userip_connections = 50
>  mail_plugins = $mail_plugins notify replication
> }
> 
> protocol imaps {
>  mail_max_userip_connections = 25
>  mail_plugins = $mail_plugins notify replication
> }
> 
> protocol pop3s {
>  mail_max_userip_connections = 25
>  mail_plugins = $mail_plugins notify replication
> }
> 
> 
> service managesieve-login {
>  process_limit = 1000
>  vsz_limit = 1g
>  inet_listener sieve {
>    port = 4190
>  }
> }
> 
> verbose_proctitle = yes
> 
> replication_max_conns = 100
> 
> replication_full_sync_interval = 1d
> 
> service replicator {
>  client_limit = 0
>  drop_priv_before_exec = no
>  idle_kill = 4294967295s
>  process_limit = 1
>  process_min_avail = 0
>  service_count = 0
>  vsz_limit = 8g
>        unix_listener replicator-doveadm {
>    mode = 0600
>    user = vmail
>  }
>  vsz_limit = 8192M
> }
> 
> 
> service aggregator {
>  process_limit = 1000
>  #vsz_limit = 1g
>  fifo_listener replication-notify-fifo {
>    user = vmail
>    group = vmail
>    mode = 0666
>  }
> 
> }
> 
> service pop3-login {
>  process_limit = 1000
>  client_limit = 100
>  vsz_limit = 512m
> }
> 
> 
> service imap-urlauth-login {
>  process_limit = 1000
>  client_limit = 1000
>  vsz_limit = 1g
> }
> 
> 
> service imap-login {
>  process_limit=1000
>  client_limit = 1000
>  vsz_limit = 1g
> }
> 
> 
> protocol sieve {
>  managesieve_implementation_string = Dovecot Pigeonhole
>  managesieve_max_line_length = 65536
> }
> 
> 
> 
> 
> #Addition ssl config
> !include sni.conf
> 
> with sni cert support (examples)
> 
> # cat sni.conf
> #sni.conf
> ssl = yes
> verbose_ssl = yes
> ssl_dh =</usr/local/etc/dovecot/dh-4096.pem
> ssl_prefer_server_ciphers = yes
> #ssl_min_protocol = TLSv1.2
> 
> #Default *.scom.ca
> ssl_key =</usr/local/etc/dovecot/scom.pem
> ssl_cert =</usr/local/etc/dovecot/scom.pem
> ssl_ca =</usr/local/etc/dovecot/scom.pem
> 
> local_name .scom.ca {
> ssl_key =</usr/local/etc/dovecot/scom.pem
> ssl_cert =</usr/local/etc/dovecot/scom.pem
> ssl_ca =</usr/local/etc/dovecot/scom.pem
> 
> }
> 
> local_name mail.clancyca.com {
>  ssl_key =</usr/local/etc/dovecot/cert/mail.clancyca.com
>  ssl_cert =</usr/local/etc/dovecot/cert/mail.clancyca.com
>  ssl_ca =</usr/local/etc/dovecot/cert/mail.clancyca.com
> }
> 
> local_name mail.paulkudla.net {
>  ssl_key =</usr/local/etc/dovecot/cert/mail.paulkudla.net
>  ssl_cert =</usr/local/etc/dovecot/cert/mail.paulkudla.net
>  ssl_ca =</usr/local/etc/dovecot/cert/mail.paulkudla.net
> }
> 
> local_name mail.ekst.ca {
>  ssl_key =</usr/local/etc/dovecot/cert/mail.ekst.ca
>  ssl_cert =</usr/local/etc/dovecot/cert/mail.ekst.ca
>  ssl_ca =</usr/local/etc/dovecot/cert/mail.ekst.ca
> }
> 
> local_name mail.hamletdevelopments.ca {
>  ssl_key =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
>  ssl_cert =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
>  ssl_ca =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
> }
> 
> pg sql support supporting replication
> 
> # cat dovecot-pgsql.conf
> driver = pgsql
> connect = host=localhost port=5433 dbname=scom_billing user=pgsql
password> default_pass_scheme = PLAIN
> 
> password_query = SELECT username as user, password FROM email_users WHERE
username = '%u' and password <> 'alias' and status = True
and destination = '%u'
> 
> user_query = SELECT home, uid, gid FROM email_users WHERE username =
'%u' and password <> 'alias' and status = True and
destination = '%u'
> 
> #iterate_query = SELECT user, password FROM email_users WHERE username =
'%u' and password <> 'alias' and status = True and
destination = '%u'
> 
> iterate_query = SELECT "username" as user, domain FROM
email_users WHERE status = True and alias_flag = False
> 
> 
> 
> 
> 
> Happy Friday !!!
> Thanks - paul
> 
> Paul Kudla
> 
> 
> Scom.ca Internet Services <http://www.scom.ca>
> 004-1009 Byron Street South
> Whitby, Ontario - Canada
> L1N 4S3
> 
> Toronto 416.642.7266
> Main 1.866.411.7266
> Fax 1.888.892.7266
> Email paul at scom.ca
> 
> On 1/6/2023 5:32 AM, Gerben Wierda wrote:
>>> On 6 Jan 2023, at 08:53, Aki Tuomi <aki.tuomi at
open-xchange.com <mailto:aki.tuomi at open-xchange.com>> wrote:
>>> 
>>> 
>>> 
>>> On January 6, 2023 3:56:39 AM GMT+02:00, Gerben Wierda
<gerben.wierda at rna.nl <mailto:gerben.wierda at rna.nl>> wrote:
>>>> One step further in my quest to create a replacement mail
server.
>>>> 
>>>> I now have my old mail server (2.3.19.1, macOS + MacPorts) and
my new (2.3.20, Alpine Linux, Docker, apk package). When I turn on replication
it works, but, after a while I see:
>>>> 
>>>> Jan 06 00:50:31 replicator: Panic: data stack: Out of memory
when allocating 268435496 bytes
>>>> Jan 06 00:50:32 replicator: Fatal: master: service(replicator):
child 133 killed with signal 6 (core dumped)
>>>> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning:
replication(sysbh): Sync failure:
>>>> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning:
replication(sysbh): Remote sent invalid input: -
>>>> 
>>>> I've removed synchronous operation for now (found a message
on the net suggesting that) but is this known and what does it mean?
>>>> 
>>>> Gerben Wierda (LinkedIn
<https://www.linkedin.com/in/gerbenwierda
<https://www.linkedin.com/in/gerbenwierda>>)
>>>> R&A IT Strategy <https://ea.rna.nl/
<https://ea.rna.nl/>> (main site)
>>>> Book: Chess and the Art of Enterprise Architecture
<https://ea.rna.nl/the-book/ <https://ea.rna.nl/the-book/>>
>>>> Book: Mastering ArchiMate
<https://ea.rna.nl/the-book-edition-iii/
<https://ea.rna.nl/the-book-edition-iii/>>
>>>> 
>>> 
>>> Dovecot default memory limit is 256M. You should probably set
>>> 
>>> service replicator {
>>>  vsz_limit = 2G
>>> }
>>> 
>>> because replicator might have to use more memory, especially for
larger indexes.
>>> 
>>> Aki
>> That is a good tip as well.
>> I had followed this bit of experience from someone else:
https://marc.info/?l=dovecot&m=164438199727640
<https://marc.info/?l=dovecot&m=164438199727640>, haven't seen any
err message since. But that might be because they are in sync now and both sides
are aware. Can I trigger full replication again so I can test?
>> Gerben
>> -- 
>> This message has been scanned for viruses and
>> dangerous content by *MailScanner*
<http://www.mailscanner.info/>, and is
>> believed to be clean.
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Paul Kudla

2023-Jan-07 10:17 UTC

head link

replicator: Panic: data stack: Out of memory when allocating 268435496 bytes

ok a little bit more info ....

My servers all run under FreeBSD 12.xx

which was also the base for the apple operating system origionally.

setting default_vsz_limit = 0 i seem to remember trying with no so great 
results

setting to zero can cause memory over runs (espically with replication) 
etc i found that when i used the config i sent eariler (vsz_limit is 
defaulted (not set )) everything worked

I generally find that tweaking the memory alloted to the individual 
services a more balanced approach but it does take a lot of trial and error

also note memory in the system is also a factor my mail servers have 32G 
dedicated to them which is what the settings were based on that seem to 
work pretty good at the moment.

I am running without any setting thus the default

I got this info from :

https://doc.dovecot.org/configuration_manual/service_configuration/

vsz_limit

Limit the process?s address space (both RLIMIT_DATA and RLIMIT_AS if 
available). When the space is reached, some memory allocations may start 
failing with ?Out of memory?, or the kernel may kill the process with 
signal 9. This setting is mainly intended to prevent memory leaks from 
eating up all of the memory, but there can be also legitimate reasons 
why the process reaches this limit. For example a huge mailbox may not 
be accessed if this limit is too low. The default value 
(18446744073709551615=2^64-1) sets the limit to default_vsz_limit, while 
0 disables the limit entirely.

There are 3 types of services that need to be optimized in different ways:

     Master services (e.g. auth, anvil, indexer, director, log):

         Currently there isn?t any easy way to optimize these. If these 
become a bottleneck, typically you need to run another Dovecot server. 
In some cases it may be possible to create multiple master processes and 
have each one be responsible for only specific users/processes, although 
this may also require some extra development.

     Services that do disk I/O or other blocking operations (e.g. imap, 
pop3, lmtp):

         These should have client_limit=1, because any blocking 
operation will block all the other clients and cause unnecessary delays 
and even timeouts. This means that process_limit specifies the maximum 
number of available parallel connections.

     Services that have no blocking operations (e.g. imap-login, 
pop3-login):

         For best performance (but a bit less safety), these should have 
process_limit and process_min_avail set to the number of CPU cores, so 
each CPU will be busy serving the process but without unnecessary 
context switches. Then client_limit needs to be set high enough to be 
able to serve all the needed connections (max connections=process_limit 
* client_limit). service_count is commonly set to unlimited (0) for 
these services. Otherwise when the service_count is beginning to be 
reached, the total number of available connections will shrink. With 
very bad luck that could mean that all the processes are simply waiting 
for the existing connections to die away before the process can die and 
a new one can be created. Although this could be made less likely by 
setting process_limit higher than process_min_avail, but that?s still 
not a guarantee since each process could get a very long running 
connection and the process_limit would be eventually reached.





Happy Saturday !!!
Thanks - paul

Paul Kudla


Scom.ca Internet Services <http://www.scom.ca>
004-1009 Byron Street South
Whitby, Ontario - Canada
L1N 4S3

Toronto 416.642.7266
Main?1.866.411.7266
Fax?1.888.892.7266
Email?paul at scom.ca

On 1/6/2023 5:20 PM, Gerben Wierda wrote:> How problematic is it to have
> 
> default_vsz_limit = 0
> 
> in dovecot.conf? macOS+MacPorts had this as a requirement even.
> 
> Gerben
> 
>> On 6 Jan 2023, at 16:49, Paul Kudla <paul at scom.ca 
>> <mailto:paul at scom.ca>> wrote:
>>
>>
>> i ran into this as well
>>
>> here is the full config for mine with replication
>>
>> # cat dovecot.conf
>> # 2.3.14 (cee3cbc0d): /usr/local/etc/dovecot/dovecot.conf
>> # OS: FreeBSD 12.1-RELEASE amd64
>> # Hostname: mail18.scom.ca <http://mail18.scom.ca>
>>
>> auth_debug = no
>> auth_debug_passwords = no
>>
>> default_process_limit = 16384
>>
>> mail_debug = no
>>
>> #lock_method = dotlock
>> #mail_max_lock_timeout = 300s
>>
>> #mbox_read_locks = dotlock
>> #mbox_write_locks = dotlock
>>
>> mmap_disable = yes
>> dotlock_use_excl = no
>> mail_fsync = always
>> mail_nfs_storage = no
>> mail_nfs_index = no
>>
>> auth_mechanisms = plain login
>> auth_verbose = yes
>> base_dir = /data/dovecot/run/
>> debug_log_path = syslog
>> disable_plaintext_auth = no
>> dsync_features = empty-header-workaround
>>
>> info_log_path = syslog
>> login_greeting = SCOM.CA Internet Services Inc. - Dovecot ready
>> login_log_format_elements = user=<%u> method=%m rip=%r lip=%l
mpid=%e %c
>>
>>
>> mail_location = maildir:~/
>>
>> mail_plugins = " virtual notify replication fts fts_lucene "
>> mail_prefetch_count = 20
>>
>> protocols = imap pop3 lmtp sieve
>>
>>
>> protocol lmtp {
>> ?mail_plugins = $mail_plugins sieve
>> ?postmaster_address >> }
>>
>> service lmtp {
>> ?process_limit=1000
>> ?vsz_limit = 512m
>> ?client_limit=1
>> ??unix_listener /usr/home/postfix.local/private/dovecot-lmtp {
>> ????group = postfix
>> ????mode = 0600
>> ????user = postfix
>> ?}
>> }
>>
>> protocol lda {
>> ?mail_plugins = $mail_plugins sieve
>> }
>>
>> service lda {
>> ?process_limit=1000
>> ?vsz_limit = 512m
>> }
>>
>> service imap {
>> ?process_limit=4096
>> ?vsz_limit = 2g
>> ?client_limit=1
>> }
>>
>> service pop3 {
>> ?process_limit=1000
>> ?vsz_limit = 512m
>> ?client_limit=1
>> }
>>
>> namespace inbox {
>> ?inbox = yes
>> ?location >> ?mailbox Drafts {
>> ???auto = subscribe
>> ???special_use = \Drafts
>> ?}
>> ?mailbox Sent {
>> ???auto = subscribe
>> ???special_use = \Sent
>> ?}
>> ?mailbox Trash {
>> ???auto = subscribe
>> ???special_use = \Trash
>> ?}
>> ?prefix >> ?separator = /
>> }
>>
>> passdb {
>> ?args = /usr/local/etc/dovecot/dovecot-pgsql.conf
>> ?driver = sql
>> }
>>
>> doveadm_port = 12345
>> doveadm_password = secretxxxx
>>
>> service doveadm {
>> ?process_limit = 0
>> ?process_min_avail = 0
>> ?idle_kill = 0
>> ?client_limit = 1
>> ?user = vmail
>> ?inet_listener {
>> ???port = 12345
>> ?}
>> }
>>
>> service config {
>> ?unix_listener config {
>> ???user = vmail
>> ???}
>> }
>>
>> dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u
>> #dsync_remote_cmd = doveadm sync -d -u%u
>>
>> replication_dsync_parameters = -d -N -l 300 -U
>>
>> plugin {
>> ?mail_log_events = delete undelete expunge copy mailbox_delete 
>> mailbox_rename
>> ?mail_log_fields = uid, box, msgid, from, subject, size, vsize, flags
>> ?push_notification_driver = dlog
>>
>> ?sieve = file:~/sieve;active=~/sieve/.dovecot.sieve
>> ?#sieve = ~/.dovecot.sieve
>> ?sieve_duplicate_default_period = 1h
>> ?sieve_duplicate_max_period = 1h
>> ?sieve_extensions = +duplicate +notify +imapflags +vacation-seconds
>> ?sieve_global_dir = /usr/local/etc/dovecot/sieve
>> ?sieve_before = /usr/local/etc/dovecot/sieve/duplicates.sieve
>>
>>
>> ?mail_replica = tcp:10.221.0.19:12345
>> ?#mail_replica = remote:vmail at 10.221.0.19 <mailto:vmail at
10.221.0.19>
>> ?#replication_sync_timeout = 2
>>
>> ?fts = lucene
>> ?fts_lucene = whitespace_chars=@.
>> ???????fts_autoindex = yes
>> ???????fts_languages = en
>> }
>>
>> #sieve_extensions = vnd.dovecot.duplicate
>>
>> #sieve_plugins = vnd.dovecot.duplicate
>>
>> service anvil {
>> ?process_limit = 1
>> ?client_limit=5000
>> ?vsz_limit = 512m
>> ?unix_listener anvil {
>> ???group = vmail
>> ???mode = 0666
>> ?}
>> }
>>
>> service indexer-worker {
>> ???????vsz_limit = 2g
>> }
>>
>>
>>
>> service auth {
>> ??process_limit = 1
>> ??client_limit=5000
>> ??vsz_limit = 1g
>>
>> ??unix_listener auth-userdb {
>> ?????mode = 0660
>> ?????user = vmail
>> ?????group = vmail
>> ??}
>> ??unix_listener /var/spool/postfix/private/auth {
>> ?????mode = 0666
>> ??}
>>
>> }
>>
>> service stats {
>> ?process_limit = 1000
>> ?vsz_limit = 1g
>> ?unix_listener stats-reader {
>> ???group = vmail
>> ???mode = 0666
>> ?}
>> ?unix_listener stats-writer {
>> ???group = vmail
>> ???mode = 0666
>> ?}
>> }
>> userdb {
>> ?args = /usr/local/etc/dovecot/dovecot-pgsql.conf
>> ?driver = sql
>>
>> }
>>
>> protocol imap {
>> ?mail_max_userip_connections = 50
>> ?mail_plugins = $mail_plugins notify replication
>> }
>>
>> protocol pop3 {
>> ?mail_max_userip_connections = 50
>> ?mail_plugins = $mail_plugins notify replication
>> }
>>
>> protocol imaps {
>> ?mail_max_userip_connections = 25
>> ?mail_plugins = $mail_plugins notify replication
>> }
>>
>> protocol pop3s {
>> ?mail_max_userip_connections = 25
>> ?mail_plugins = $mail_plugins notify replication
>> }
>>
>>
>> service managesieve-login {
>> ?process_limit = 1000
>> ?vsz_limit = 1g
>> ?inet_listener sieve {
>> ???port = 4190
>> ?}
>> }
>>
>> verbose_proctitle = yes
>>
>> replication_max_conns = 100
>>
>> replication_full_sync_interval = 1d
>>
>> service replicator {
>> ?client_limit = 0
>> ?drop_priv_before_exec = no
>> ?idle_kill = 4294967295s
>> ?process_limit = 1
>> ?process_min_avail = 0
>> ?service_count = 0
>> ?vsz_limit = 8g
>> ???????unix_listener replicator-doveadm {
>> ???mode = 0600
>> ???user = vmail
>> ?}
>> ?vsz_limit = 8192M
>> }
>>
>>
>> service aggregator {
>> ?process_limit = 1000
>> ?#vsz_limit = 1g
>> ?fifo_listener replication-notify-fifo {
>> ???user = vmail
>> ???group = vmail
>> ???mode = 0666
>> ?}
>>
>> }
>>
>> service pop3-login {
>> ?process_limit = 1000
>> ?client_limit = 100
>> ?vsz_limit = 512m
>> }
>>
>>
>> service imap-urlauth-login {
>> ?process_limit = 1000
>> ?client_limit = 1000
>> ?vsz_limit = 1g
>> }
>>
>>
>> service imap-login {
>> ?process_limit=1000
>> ?client_limit = 1000
>> ?vsz_limit = 1g
>> }
>>
>>
>> protocol sieve {
>> ?managesieve_implementation_string = Dovecot Pigeonhole
>> ?managesieve_max_line_length = 65536
>> }
>>
>>
>>
>>
>> #Addition ssl config
>> !include sni.conf
>>
>> with sni cert support (examples)
>>
>> # cat sni.conf
>> #sni.conf
>> ssl = yes
>> verbose_ssl = yes
>> ssl_dh =</usr/local/etc/dovecot/dh-4096.pem
>> ssl_prefer_server_ciphers = yes
>> #ssl_min_protocol = TLSv1.2
>>
>> #Default *.scom.ca <http://scom.ca>
>> ssl_key =</usr/local/etc/dovecot/scom.pem
>> ssl_cert =</usr/local/etc/dovecot/scom.pem
>> ssl_ca =</usr/local/etc/dovecot/scom.pem
>>
>> local_name .scom.ca <http://scom.ca> {
>> ssl_key =</usr/local/etc/dovecot/scom.pem
>> ssl_cert =</usr/local/etc/dovecot/scom.pem
>> ssl_ca =</usr/local/etc/dovecot/scom.pem
>>
>> }
>>
>> local_name mail.clancyca.com <http://mail.clancyca.com> {
>> ?ssl_key =</usr/local/etc/dovecot/cert/mail.clancyca.com 
>> <http://mail.clancyca.com>
>> ?ssl_cert =</usr/local/etc/dovecot/cert/mail.clancyca.com 
>> <http://mail.clancyca.com>
>> ?ssl_ca =</usr/local/etc/dovecot/cert/mail.clancyca.com 
>> <http://mail.clancyca.com>
>> }
>>
>> local_name mail.paulkudla.net <http://mail.paulkudla.net> {
>> ?ssl_key =</usr/local/etc/dovecot/cert/mail.paulkudla.net 
>> <http://mail.paulkudla.net>
>> ?ssl_cert =</usr/local/etc/dovecot/cert/mail.paulkudla.net 
>> <http://mail.paulkudla.net>
>> ?ssl_ca =</usr/local/etc/dovecot/cert/mail.paulkudla.net 
>> <http://mail.paulkudla.net>
>> }
>>
>> local_name mail.ekst.ca <http://mail.ekst.ca> {
>> ?ssl_key =</usr/local/etc/dovecot/cert/mail.ekst.ca
<http://mail.ekst.ca>
>> ?ssl_cert =</usr/local/etc/dovecot/cert/mail.ekst.ca
<http://mail.ekst.ca>
>> ?ssl_ca =</usr/local/etc/dovecot/cert/mail.ekst.ca
<http://mail.ekst.ca>
>> }
>>
>> local_name mail.hamletdevelopments.ca 
>> <http://mail.hamletdevelopments.ca> {
>> ?ssl_key =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca 
>> <http://mail.hamletdevelopments.ca>
>> ?ssl_cert =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca 
>> <http://mail.hamletdevelopments.ca>
>> ?ssl_ca =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca 
>> <http://mail.hamletdevelopments.ca>
>> }
>>
>> pg sql support supporting replication
>>
>> # cat dovecot-pgsql.conf
>> driver = pgsql
>> connect = host=localhost port=5433 dbname=scom_billing user=pgsql 
>> password>> default_pass_scheme = PLAIN
>>
>> password_query = SELECT username as user, password FROM email_users 
>> WHERE username = '%u' and password <> 'alias' and
status = True and
>> destination = '%u'
>>
>> user_query = SELECT home, uid, gid FROM email_users WHERE username = 
>> '%u' and password <> 'alias' and status = True
and destination = '%u'
>>
>> #iterate_query = SELECT user, password FROM email_users WHERE username 
>> = '%u' and password <> 'alias' and status = True
and destination = '%u'
>>
>> iterate_query = SELECT "username" as user, domain FROM
email_users
>> WHERE status = True and alias_flag = False
>>
>>
>>
>>
>>
>> Happy Friday !!!
>> Thanks - paul
>>
>> Paul Kudla
>>
>>
>> Scom.ca <http://Scom.ca> Internet Services <http://www.scom.ca
>> <http://www.scom.ca>>
>> 004-1009 Byron Street South
>> Whitby, Ontario - Canada
>> L1N 4S3
>>
>> Toronto 416.642.7266
>> Main?1.866.411.7266
>> Fax?1.888.892.7266
>> Email?paul at scom.ca <mailto:paul at scom.ca>
>>
>> On 1/6/2023 5:32 AM, Gerben Wierda wrote:
>>>> On 6 Jan 2023, at 08:53, Aki Tuomi <aki.tuomi at
open-xchange.com
>>>> <mailto:aki.tuomi at open-xchange.com>> wrote:
>>>>
>>>>
>>>>
>>>> On January 6, 2023 3:56:39 AM GMT+02:00, Gerben Wierda 
>>>> <gerben.wierda at rna.nl <mailto:gerben.wierda at
rna.nl>> wrote:
>>>>> One step further in my quest to create a replacement mail
server.
>>>>>
>>>>> I now have my old mail server (2.3.19.1, macOS + MacPorts)
and my
>>>>> new (2.3.20, Alpine Linux, Docker, apk package). When I
turn on
>>>>> replication it works, but, after a while I see:
>>>>>
>>>>> Jan 06 00:50:31 replicator: Panic: data stack: Out of
memory when
>>>>> allocating 268435496 bytes
>>>>> Jan 06 00:50:32 replicator: Fatal: master:
service(replicator):
>>>>> child 133 killed with signal 6 (core dumped)
>>>>> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: 
>>>>> replication(sysbh): Sync failure:
>>>>> Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: 
>>>>> replication(sysbh): Remote sent invalid input: -
>>>>>
>>>>> I've removed synchronous operation for now (found a
message on the
>>>>> net suggesting that) but is this known and what does it
mean?
>>>>>
>>>>> Gerben Wierda (LinkedIn
<https://www.linkedin.com/in/gerbenwierda
>>>>> <https://www.linkedin.com/in/gerbenwierda>>)
>>>>> R&A IT Strategy <https://ea.rna.nl/
<https://ea.rna.nl/>> (main site)
>>>>> Book: Chess and the Art of Enterprise?Architecture 
>>>>> <https://ea.rna.nl/the-book/
<https://ea.rna.nl/the-book/>>
>>>>> Book: Mastering ArchiMate
<https://ea.rna.nl/the-book-edition-iii/
>>>>> <https://ea.rna.nl/the-book-edition-iii/>>
>>>>>
>>>>
>>>> Dovecot default memory limit is 256M. You should probably set
>>>>
>>>> service replicator {
>>>> ?vsz_limit = 2G
>>>> }
>>>>
>>>> because replicator might have to use more memory, especially
for
>>>> larger indexes.
>>>>
>>>> Aki
>>> That is a good tip as well.
>>> I had followed this bit of experience from someone else: 
>>> https://marc.info/?l=dovecot&m=164438199727640 
>>> <https://marc.info/?l=dovecot&m=164438199727640>,
haven't seen any
>>> err message since. But that might be because they are in sync now
and
>>> both sides are aware. Can I trigger full replication again so I can
test?
>>> Gerben
>>> -- 
>>> This message has been scanned for viruses and
>>> dangerous content by *MailScanner*
<http://www.mailscanner.info/>, and is
>>> believed to be clean.
> 
> 
> -- 
> This message has been scanned for viruses and
> dangerous content by *MailScanner* <http://www.mailscanner.info/>,
and is
> believed to be clean.

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