SoGo high memory consumption after 2027-07b
Author: c-store-cpCreated Sep 4, 2026Updated Sep 7, 2026
Labelsbug
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Description
Hello community, we experience an odd issue with mailcow dockerized after 2027-7b upgrade.
From time to time, SoGo takes up all available memory including swap. This leads to an unresponsive system, emails are rejected, and the system is not even accessible via shell.
The virtual machine has been assigned 24 Cores (AMD Epyc) / 24 GB of RAM, swap is a 4GB, storage runs on fast SSD.
I have researched this on the internet, and recommendation was to change the number of workers and also set a different memory limit for the workers. I tried various settings, nothing helped.
I can see that even though SxVMemLimit is set to 384, the Sogo processes reserve up to 5G of RAM
PID USER PR NI VIRT RES SHR S %CPU %MEM ZEIT+ BEFEHL
1209468 999 20 0 5130564 4,8g 208348 R 99,3 20,6 1:58.19 sogod
The mailcow-dockerized is only hosting 8 mailboxes currently.
I have set the following in docker-compose.override.yml :
sogo-mailcow: mem_limit: 512M mem_reservation: 512M
That resolves the issue at least for me.
Steps to reproduce:
- Install mailcow dockerized
- create mailboxes
- install 2027-7b update
Logs:
sogo-mailcow-1 | Sep 4 08:42:57 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:43:00 b42e01153afe sogod [9]: [WARN] <0x0x558a61f70e60[WOWatchDogChild]> pid 50 has been hanging in the same request for 3 minutes
sogo-mailcow-1 | Sep 4 08:43:00 b42e01153afe sogod [50]: <0x0x558a61cdfba0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:43:03 b42e01153afe sogod [49]: <0x0x558a622a1480[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:43:15 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5e0c0[WOWatchDogChild]> pid 49 has been hanging in the same request for 4 minutes
sogo-mailcow-1 | Sep 4 08:43:25 b42e01153afe sogod [48]: aa.bb.cc.dd "REPORT /SOGo/dav/[email protected]/Calendar/personal/ HTTP/1.1" 207 9068/670 0.015 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:43:25 b42e01153afe sogod [48]: aa.bb.cc.dd "REPORT /SOGo/dav/kalender@XXXXX/Calendar/personal/ HTTP/1.1" 207 30716/670 0.035 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:43:26 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5ee00[WOWatchDogChild]> pid 51 has been hanging in the same request for 5 minutes
sogo-mailcow-1 | Sep 4 08:43:29 b42e01153afe sogod [48]: mailcowdockerized-watchdog-mailcow-1.mailcowdockerized_mailcow-network "GET /SOGo.index/ HTTP/1.1" 200 2578/0 0.007 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:43:42 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:43:45 b42e01153afe sogod [50]: <0x0x558a61cdfba0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:43:48 b42e01153afe sogod [49]: <0x0x558a622a1480[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:44:00 b42e01153afe sogod [9]: [WARN] <0x0x558a61f70e60[WOWatchDogChild]> pid 50 has been hanging in the same request for 4 minutes
sogo-mailcow-1 | Sep 4 08:44:15 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5e0c0[WOWatchDogChild]> pid 49 has been hanging in the same request for 5 minutes
sogo-mailcow-1 | Sep 4 08:44:24 b42e01153afe sogod [48]: mailcowdockerized-watchdog-mailcow-1.mailcowdockerized_mailcow-network "GET /SOGo.index/ HTTP/1.1" 200 2578/0 0.008 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:44:26 b42e01153afe sogod [48]: aa.bb.cc.dd "REPORT /SOGo/dav/[email protected]/Calendar/personal/ HTTP/1.1" 207 9068/670 0.009 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:44:26 b42e01153afe sogod [48]: aa.bb.cc.dd "REPORT /SOGo/dav/kalender@XXXXX/Calendar/personal/ HTTP/1.1" 207 30716/670 0.023 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:44:26 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5ee00[WOWatchDogChild]> pid 51 has been hanging in the same request for 6 minutes
sogo-mailcow-1 | Sep 4 08:44:27 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:44:30 b42e01153afe sogod [50]: <0x0x558a61cdfba0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:44:33 b42e01153afe sogod [49]: <0x0x558a622a1480[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:45:00 b42e01153afe sogod [9]: [WARN] <0x0x558a61f70e60[WOWatchDogChild]> pid 50 has been hanging in the same request for 5 minutes
sogo-mailcow-1 | Sep 4 08:45:01 b42e01153afe sogod [48]: <0x0x558a620108f0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:45:12 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:45:15 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5e0c0[WOWatchDogChild]> pid 49 has been hanging in the same request for 6 minutes
sogo-mailcow-1 | Sep 4 08:45:15 b42e01153afe sogod [50]: [ERROR] <0x0x558a61c20980[WOHttpTransaction]> client disconnected during delivery of response for <WORequest[0x0x558a622cc3e0]: method=POST uri=/SOGo/Microsoft-Server-ActiveSync?Cmd=Ping&User=XXXXX%40XXXXX&DeviceId=XXXX&DeviceType=Android app=SOGo rqKey=Microsoft-Server-ActiveSync rqPath=(null)> (len=13): the socket was shutdown
sogo-mailcow-1 | Sep 4 08:45:15 b42e01153afe sogod [50]: aa.bb.cc.dd.ee.ff, aa.bb.cc.dd.ee.ff "POST /SOGo/Microsoft-Server-ActiveSync?Cmd=Ping&User=XXXXX%40XXXXX&DeviceId=androidc1760133644&DeviceType=Android HTTP/1.1" 200 13/160 315.262 - - 2M - 13
sogo-mailcow-1 | Sep 4 08:45:18 b42e01153afe sogod [49]: <0x0x558a622a1480[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:45:23 b42e01153afe sogod [50]: [WARN] <0x0x7f3bf5f521e0[WOxElemBuilder]> could not locate builders: WOxExtElemBuilder,WOxExtElemBuilder
sogo-mailcow-1 | Sep 4 08:45:23 b42e01153afe sogod [50]: mailcowdockerized-watchdog-mailcow-1.mailcowdockerized_mailcow-network "GET /SOGo.index/ HTTP/1.1" 200 2578/0 0.045 - - 1M - 13
sogo-mailcow-1 | Sep 4 08:45:26 b42e01153afe sogod [50]: aa.bb.cc.dd "REPORT /SOGo/dav/[email protected]/Calendar/personal/ HTTP/1.1" 207 9068/670 0.014 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:45:26 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5ee00[WOWatchDogChild]> pid 51 has been hanging in the same request for 7 minutes
sogo-mailcow-1 | Sep 4 08:45:27 b42e01153afe sogod [50]: aa.bb.cc.dd "REPORT /SOGo/dav/kalender@XXXXX/Calendar/personal/ HTTP/1.1" 207 30716/670 0.032 - - 192K - 13
sogo-mailcow-1 | Sep 4 08:45:46 b42e01153afe sogod [48]: <0x0x558a620108f0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:45:57 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:46:01 b42e01153afe sogod [9]: [WARN] <0x0x558a61f466e0[WOWatchDogChild]> pid 48 has been hanging in the same request for 1 minutes
sogo-mailcow-1 | Sep 4 08:46:04 b42e01153afe sogod [49]: <0x0x558a622a1480[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:46:06 b42e01153afe sogod [50]: <0x0x558a62398210[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:46:15 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5e0c0[WOWatchDogChild]> pid 49 has been hanging in the same request for 7 minutes
sogo-mailcow-1 | Sep 4 08:46:26 b42e01153afe sogod [9]: [WARN] <0x0x558a61f5ee00[WOWatchDogChild]> pid 51 has been hanging in the same request for 8 minutes
sogo-mailcow-1 | Sep 4 08:46:27 b42e01153afe sogod [45]: aa.bb.cc.dd "REPORT /SOGo/dav/[email protected]/Calendar/personal/ HTTP/1.1" 207 9068/670 0.015 - - 0 - 13
sogo-mailcow-1 | Sep 4 08:46:27 b42e01153afe sogod [45]: aa.bb.cc.dd "REPORT /SOGo/dav/kalender@XXXXX/Calendar/personal/ HTTP/1.1" 207 30716/670 0.049 - - 0 - 14
sogo-mailcow-1 | Sep 4 08:46:31 b42e01153afe sogod [48]: <0x0x558a620108f0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:46:39 b42e01153afe sogod [45]: mailcowdockerized-watchdog-mailcow-1.mailcowdockerized_mailcow-network "GET /SOGo.index/ HTTP/1.1" 200 2578/0 0.004 - - 0 - 14
sogo-mailcow-1 | Sep 4 08:46:42 b42e01153afe sogod [51]: <0x0x558a61d4f360[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:46:49 b42e01153afe sogod [49]: [ERROR] <0x0x558a622b8a50[WOHttpTransaction]> client disconnected during delivery of response for <WORequest[0x0x558a61b850e0]: method=POST uri=/SOGo/[email protected]&DeviceId=XXX&DeviceType=iPhone&Cmd=Ping app=SOGo rqKey=Microsoft-Server-ActiveSync rqPath=(null)> (len=13): the socket was shutdown
sogo-mailcow-1 | Sep 4 08:46:49 b42e01153afe sogod [49]: aa.bb.cc.dd, aa.bb.cc.dd "POST /SOGo/[email protected]&DeviceId=RC6IGGCFBH4HR5GO7VLISR16V8&DeviceType=iPhone&Cmd=Ping HTTP/1.1" 200 13/0 453.509 - - 48M - 12
sogo-mailcow-1 | Sep 4 08:46:51 b42e01153afe sogod [50]: <0x0x558a62398210[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:47:01 b42e01153afe sogod [9]: [WARN] <0x0x558a61f466e0[WOWatchDogChild]> pid 48 has been hanging in the same request for 2 minutes
sogo-mailcow-1 | Sep 4 08:47:02 b42e01153afe sogod [49]: <0x0x558a624d50c0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...
sogo-mailcow-1 | Sep 4 08:47:05 b42e01153afe sogod [9]: [WARN] <0x0x558a61f70e60[WOWatchDogChild]> pid 50 has been hanging in the same request for 1 minutes
sogo-mailcow-1 | Sep 4 08:47:15 b42e01153afe sogod [45]: mailcowdockerized-watchdog-mailcow-1.mailcowdockerized_mailcow-network "GET /SOGo.index/ HTTP/1.1" 200 2578/0 0.005 - - 0 - 14
sogo-mailcow-1 | Sep 4 08:47:16 b42e01153afe sogod [48]: <0x0x558a620108f0[SOGoActiveSyncDispatcher]> Sleeping 45 seconds while detecting changes for user [email protected] in Ping...Which branch are you using?
master (stable)
Which architecture are you using?
x86_64
Operating System:
Debian Trixie
Server/VM specifications:
24 GB, 24 Cores (Amd Epyc 7402)
Is Apparmor, SELinux or similar active?
no
Virtualization technology:
VMWare esxi
Docker version:
29.7.2
docker-compose version or docker compose version:
5.51
mailcow version:
2026-7b
Reverse proxy:
Apache
Logs of git diff:
Logs of iptables -L -vn:
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
38M 117G MAILCOW all -- * * 0.0.0.0/0 0.0.0.0/0 /* mailcow */
38M 117G DOCKER-USER all -- * * 0.0.0.0/0 0.0.0.0/0
38M 117G DOCKER-FORWARD all -- * * 0.0.0.0/0 0.0.0.0/0
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:12345
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:4190
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:995
8 416 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:993
39 2028 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:143
120 7200 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.250 tcp dpt:110
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.253 tcp dpt:587
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.253 tcp dpt:465
3097 178K ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.253 tcp dpt:25
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.5 tcp dpt:3306
71562 4292K ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.11 tcp dpt:443
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.11 tcp dpt:80
0 0 ACCEPT tcp -- !br-mailcow br-mailcow 0.0.0.0/0 172.22.1.249 tcp dpt:6379
0 0 DROP all -- !docker0 docker0 0.0.0.0/0 0.0.0.0/0
1 52 DROP all -- !br-mailcow br-mailcow 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-BRIDGE (1 references)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * docker0 0.0.0.0/0 0.0.0.0/0
111K 6551K DOCKER all -- * br-mailcow 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-CT (1 references)
pkts bytes target prot opt in out source destination
0 0 ACCEPT all -- * docker0 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
24M 5188M ACCEPT all -- * br-mailcow 0.0.0.0/0 0.0.0.0/0 ctstate RELATED,ESTABLISHED
Chain DOCKER-FORWARD (1 references)
pkts bytes target prot opt in out source destination
38M 117G DOCKER-CT all -- * * 0.0.0.0/0 0.0.0.0/0
14M 112G DOCKER-INTERNAL all -- * * 0.0.0.0/0 0.0.0.0/0
14M 112G DOCKER-BRIDGE all -- * * 0.0.0.0/0 0.0.0.0/0
0 0 ACCEPT all -- docker0 * 0.0.0.0/0 0.0.0.0/0
14M 112G ACCEPT all -- br-mailcow * 0.0.0.0/0 0.0.0.0/0
Chain DOCKER-INTERNAL (1 references)
pkts bytes target prot opt in out source destination
Chain DOCKER-USER (1 references)
pkts bytes target prot opt in out source destination
Chain MAILCOW (1 references)
pkts bytes target prot opt in out source destination
0 0 DROP tcp -- !br-mailcow br-mailcow 0.0.0.0/0 0.0.0.0/0 /* mailcow isolation */Logs of ip6tables -L -vn:
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 MAILCOW all -- * * ::/0 ::/0 /* mailcow */
0 0 DOCKER-USER all -- * * ::/0 ::/0
0 0 DOCKER-FORWARD all -- * * ::/0 ::/0
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain DOCKER (0 references)
pkts bytes target prot opt in out source destination
Chain DOCKER-BRIDGE (1 references)
pkts bytes target prot opt in out source destination
Chain DOCKER-CT (1 references)
pkts bytes target prot opt in out source destination
Chain DOCKER-FORWARD (1 references)
pkts bytes target prot opt in out source destination
0 0 DOCKER-CT all -- * * ::/0 ::/0
0 0 DOCKER-INTERNAL all -- * * ::/0 ::/0
0 0 DOCKER-BRIDGE all -- * * ::/0 ::/0
Chain DOCKER-INTERNAL (1 references)
pkts bytes target prot opt in out source destination
Chain DOCKER-USER (1 references)
pkts bytes target prot opt in out source destination
Chain MAILCOW (1 references)
pkts bytes target prot opt in out source destinationLogs of iptables -L -vn -t nat:
Chain PREROUTING (policy ACCEPT 2026K packets, 159M bytes)
pkts bytes target prot opt in out source destination
112K 6584K DOCKER all -- * * 0.0.0.0/0 0.0.0.0/0 ADDRTYPE match dst-type LOCAL
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 2462 packets, 152K bytes)
pkts bytes target prot opt in out source destination
0 0 DOCKER all -- * * 0.0.0.0/0 !127.0.0.0/8 ADDRTYPE match dst-type LOCAL
Chain POSTROUTING (policy ACCEPT 114K packets, 6707K bytes)
pkts bytes target prot opt in out source destination
1978K 150M MASQUERADE all -- * !br-mailcow 172.22.1.0/24 0.0.0.0/0
0 0 MASQUERADE all -- * !docker0 172.17.0.0/16 0.0.0.0/0
Chain DOCKER (2 references)
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- !br-mailcow * 0.0.0.0/0 127.0.0.1 tcp dpt:7654 to:172.22.1.249:6379
0 0 DNAT tcp -- !br-mailcow * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 to:172.22.1.11:80
71589 4294K DNAT tcp -- !br-mailcow * 0.0.0.0/0 0.0.0.0/0 tcp dpt:443 to:172.22.1.11:443
0 0 DNAT tcp -- !br-mailcow * 0.0.0.0/0 127.0.0.1 tcp dpt:13306 to:172.22.1.5:3306
3104 178K DNAT tcp -- !br-mailcow * 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 to:172.22.1.253:25
0 0 DNAT tcp -- !br-mailcow * 0.0.0.0/0 0.0.0.0/0 tcp dpt:465 to:172.22.1.253:465
0 0 DNAT tcp -- !br-mailcow * 0.0.0.0/0Source: mailcow/mailcow-dockerized