thr3ads.net - dovecot - dovecot/config processes open, and consuming all memory [Aug 2022]

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filipe at digirati.com.br

2022-Aug-12 22:06 UTC

dovecot/config processes open, and consuming all memory

I'm having strange behavior in dovecot 2.3.16.
It's opening dozens of dovecot/config process and consuming all server 
memory. Normally each process consumes between 700Mb and 1Gb of ram.

Would anyone have an idea about this?

service config {
 ? vsz_limit = 2048M
 ? idle_kill = 60s
 ? service_count = 1024
}

pstree
systemd???ModemManager???2*[{ModemManager}]
 ??????? ??agetty
 ??????? ??cron
 ??????? ??dbus-daemon
 ??????? ??dovecot???anvil
 ??????? ????????? ??6*[auth]
 ??????? ????????? ??46*[config]
 ??????? ????????? ??1212*[imap]
 ??????? ????????? ??155*[imap-login]
 ??????? ????????? ??12*[lmtp]
 ??????? ????????? ??38*[log]
 ??????? ????????? ??10*[managesieve]
 ??????? ????????? ??19*[pop3]
 ??????? ????????? ??3*[pop3-login]
 ??????? ????????? ??18*[stats]


root?????? 45831? 0.0? 1.1 774688 752732 ??????? S??? 09:31 0:31 
dovecot/config
root????? 388792? 0.0? 1.1 775060 753276 ??????? S??? 14:00?? 0:15 
dovecot/config
root????? 510685? 0.0? 1.1 775384 753604 ??????? S??? 15:06?? 0:20 
dovecot/config
root????? 675638? 0.0? 1.1 775348 753620 ??????? S??? 16:56?? 0:15 
dovecot/config
root????? 795375? 0.0? 1.1 775460 753516 ??????? S??? 18:03?? 0:07 
dovecot/config
root????? 798754? 0.2? 1.1 775592 753712 ??????? S??? 18:05?? 0:30 
dovecot/config
root???? 1082696? 0.2? 1.1 774892 753216 ??????? S??? 21:10?? 0:07 
dovecot/config
root???? 1098433? 0.4? 1.1 774924 753244 ??????? S??? 21:33?? 0:07 
dovecot/config
root???? 1109255? 0.9? 1.1 774924 753344 ??????? S??? 21:50?? 0:07 
dovecot/config
root???? 1112976? 2.0? 1.1 774956 753528 ??????? S??? 21:57?? 0:07 
dovecot/config
root???? 1114137? 3.0? 1.1 775028 753308 ??????? S??? 21:59?? 0:07 
dovecot/config
root???? 1115382? 5.4? 1.1 774924 753496 ??????? S??? 22:01?? 0:06 
dovecot/config
root???? 1883627? 0.0? 1.1 759120 728832 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 1889705? 0.0? 1.8 1251460 1221872 ????? S??? Aug11?? 0:11 
dovecot/config
root???? 1895022? 0.0? 1.8 1253280 1224284 ????? S??? Aug11?? 0:11 
dovecot/config
root???? 1900690? 0.0? 1.8 1255684 1227528 ????? S??? Aug11?? 0:12 
dovecot/config
root???? 1905648? 0.0? 1.8 1257880 1229912 ????? S??? Aug11?? 0:12 
dovecot/config
root???? 1910857? 0.0? 1.8 1259156 1231552 ????? S??? Aug11?? 0:12 
dovecot/config
root???? 1914332? 0.0? 1.1 764328 736552 ??????? S??? Aug11?? 0:20 
dovecot/config
root???? 2343896? 0.0? 1.8 1259472 1231516 ????? S??? Aug11?? 0:12 
dovecot/config
root???? 2346351? 0.0? 1.8 1259472 1231836 ????? S??? Aug11?? 0:13 
dovecot/config
root???? 2348559? 0.0? 1.1 764704 736440 ??????? S??? Aug11?? 0:14 
dovecot/config
root???? 2445701? 0.0? 1.1 764276 736540 ??????? S??? Aug11?? 0:19 
dovecot/config
root???? 2572525? 0.0? 1.1 764640 736880 ??????? S??? Aug11?? 0:18 
dovecot/config
root???? 2734251? 0.0? 1.1 764776 737696 ??????? S??? Aug11?? 0:08 
dovecot/config
root???? 2740980? 0.0? 1.1 764768 737244 ??????? S??? Aug11?? 0:17 
dovecot/config
root???? 2899925? 0.0? 1.1 764624 737760 ??????? S??? Aug11?? 0:43 
dovecot/config
root???? 3517063? 0.0? 1.1 764984 738004 ??????? S??? Aug11?? 0:09 
dovecot/config
root???? 3541465? 0.0? 1.1 765224 738756 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3545589? 0.0? 1.1 766452 740408 ??????? S??? Aug11?? 0:06 
dovecot/config
root???? 3549259? 0.0? 1.1 766796 741048 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3553902? 0.0? 1.1 767812 742284 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3558080? 0.0? 1.1 768440 743524 ??????? S??? Aug11?? 0:08 
dovecot/config
root???? 3562091? 0.0? 1.1 769224 744424 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3568721? 0.0? 1.1 769388 744888 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3573024? 0.0? 1.1 770048 745904 ??????? S??? Aug11?? 0:08 
dovecot/config
root???? 3578416? 0.0? 1.1 770836 746736 ??????? S??? Aug11?? 0:06 
dovecot/config
root???? 3581765? 0.0? 1.1 771948 748492 ??????? S??? Aug11?? 0:06 
dovecot/config
root???? 3585837? 0.0? 1.1 772828 749860 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3590276? 0.0? 1.1 773560 750520 ??????? S??? Aug11?? 0:07 
dovecot/config
root???? 3594640? 0.0? 1.1 774612 752552 ??????? S??? Aug11?? 0:08 
dovecot/config
root???? 3597417? 0.0? 1.1 774968 753076 ??????? S??? Aug11?? 0:35 
dovecot/config
root???? 4116314? 0.0? 1.9 1280496 1258580 ????? S??? 05:31?? 0:13 
dovecot/config
root???? 4118115? 0.0? 1.1 774688 752556 ??????? S??? 05:33?? 0:16 
dovecot/config

Paul Kudla (SCOM.CA Internet Services Inc.)

2022-Aug-12 22:26 UTC

head link

dovecot/config processes open, and consuming all memory

for what's it is worth

i am not running any vsize on the config

service config {
   unix_listener config {
     user = vmail
     }
}

i'm just running defaults

i do use vsz_limit elsewhere main to curve the replication processes ??

never had an issue 2.3.17 / 18 / 19

never used 16 (fyi)

maybe 2048M is insufficent system wide, try increasing 10 1g ?




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 8/12/2022 6:06 PM, dovecot-bounces at dovecot.org
wrote:> 
> I'm having strange behavior in dovecot 2.3.16.
> It's opening dozens of dovecot/config process and consuming all server 
> memory. Normally each process consumes between 700Mb and 1Gb of ram.
> 
> Would anyone have an idea about this?
> 
> service config {
>  ? vsz_limit = 2048M
>  ? idle_kill = 60s
>  ? service_count = 1024
> }
> 
> pstree
> systemd???ModemManager???2*[{ModemManager}]
>  ??????? ??agetty
>  ??????? ??cron
>  ??????? ??dbus-daemon
>  ??????? ??dovecot???anvil
>  ??????? ????????? ??6*[auth]
>  ??????? ????????? ??46*[config]
>  ??????? ????????? ??1212*[imap]
>  ??????? ????????? ??155*[imap-login]
>  ??????? ????????? ??12*[lmtp]
>  ??????? ????????? ??38*[log]
>  ??????? ????????? ??10*[managesieve]
>  ??????? ????????? ??19*[pop3]
>  ??????? ????????? ??3*[pop3-login]
>  ??????? ????????? ??18*[stats]
> 
> 
> root?????? 45831? 0.0? 1.1 774688 752732 ??????? S??? 09:31 0:31 
> dovecot/config
> root????? 388792? 0.0? 1.1 775060 753276 ??????? S??? 14:00?? 0:15 
> dovecot/config
> root????? 510685? 0.0? 1.1 775384 753604 ??????? S??? 15:06?? 0:20 
> dovecot/config
> root????? 675638? 0.0? 1.1 775348 753620 ??????? S??? 16:56?? 0:15 
> dovecot/config
> root????? 795375? 0.0? 1.1 775460 753516 ??????? S??? 18:03?? 0:07 
> dovecot/config
> root????? 798754? 0.2? 1.1 775592 753712 ??????? S??? 18:05?? 0:30 
> dovecot/config
> root???? 1082696? 0.2? 1.1 774892 753216 ??????? S??? 21:10?? 0:07 
> dovecot/config
> root???? 1098433? 0.4? 1.1 774924 753244 ??????? S??? 21:33?? 0:07 
> dovecot/config
> root???? 1109255? 0.9? 1.1 774924 753344 ??????? S??? 21:50?? 0:07 
> dovecot/config
> root???? 1112976? 2.0? 1.1 774956 753528 ??????? S??? 21:57?? 0:07 
> dovecot/config
> root???? 1114137? 3.0? 1.1 775028 753308 ??????? S??? 21:59?? 0:07 
> dovecot/config
> root???? 1115382? 5.4? 1.1 774924 753496 ??????? S??? 22:01?? 0:06 
> dovecot/config
> root???? 1883627? 0.0? 1.1 759120 728832 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 1889705? 0.0? 1.8 1251460 1221872 ????? S??? Aug11?? 0:11 
> dovecot/config
> root???? 1895022? 0.0? 1.8 1253280 1224284 ????? S??? Aug11?? 0:11 
> dovecot/config
> root???? 1900690? 0.0? 1.8 1255684 1227528 ????? S??? Aug11?? 0:12 
> dovecot/config
> root???? 1905648? 0.0? 1.8 1257880 1229912 ????? S??? Aug11?? 0:12 
> dovecot/config
> root???? 1910857? 0.0? 1.8 1259156 1231552 ????? S??? Aug11?? 0:12 
> dovecot/config
> root???? 1914332? 0.0? 1.1 764328 736552 ??????? S??? Aug11?? 0:20 
> dovecot/config
> root???? 2343896? 0.0? 1.8 1259472 1231516 ????? S??? Aug11?? 0:12 
> dovecot/config
> root???? 2346351? 0.0? 1.8 1259472 1231836 ????? S??? Aug11?? 0:13 
> dovecot/config
> root???? 2348559? 0.0? 1.1 764704 736440 ??????? S??? Aug11?? 0:14 
> dovecot/config
> root???? 2445701? 0.0? 1.1 764276 736540 ??????? S??? Aug11?? 0:19 
> dovecot/config
> root???? 2572525? 0.0? 1.1 764640 736880 ??????? S??? Aug11?? 0:18 
> dovecot/config
> root???? 2734251? 0.0? 1.1 764776 737696 ??????? S??? Aug11?? 0:08 
> dovecot/config
> root???? 2740980? 0.0? 1.1 764768 737244 ??????? S??? Aug11?? 0:17 
> dovecot/config
> root???? 2899925? 0.0? 1.1 764624 737760 ??????? S??? Aug11?? 0:43 
> dovecot/config
> root???? 3517063? 0.0? 1.1 764984 738004 ??????? S??? Aug11?? 0:09 
> dovecot/config
> root???? 3541465? 0.0? 1.1 765224 738756 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3545589? 0.0? 1.1 766452 740408 ??????? S??? Aug11?? 0:06 
> dovecot/config
> root???? 3549259? 0.0? 1.1 766796 741048 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3553902? 0.0? 1.1 767812 742284 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3558080? 0.0? 1.1 768440 743524 ??????? S??? Aug11?? 0:08 
> dovecot/config
> root???? 3562091? 0.0? 1.1 769224 744424 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3568721? 0.0? 1.1 769388 744888 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3573024? 0.0? 1.1 770048 745904 ??????? S??? Aug11?? 0:08 
> dovecot/config
> root???? 3578416? 0.0? 1.1 770836 746736 ??????? S??? Aug11?? 0:06 
> dovecot/config
> root???? 3581765? 0.0? 1.1 771948 748492 ??????? S??? Aug11?? 0:06 
> dovecot/config
> root???? 3585837? 0.0? 1.1 772828 749860 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3590276? 0.0? 1.1 773560 750520 ??????? S??? Aug11?? 0:07 
> dovecot/config
> root???? 3594640? 0.0? 1.1 774612 752552 ??????? S??? Aug11?? 0:08 
> dovecot/config
> root???? 3597417? 0.0? 1.1 774968 753076 ??????? S??? Aug11?? 0:35 
> dovecot/config
> root???? 4116314? 0.0? 1.9 1280496 1258580 ????? S??? 05:31?? 0:13 
> dovecot/config
> root???? 4118115? 0.0? 1.1 774688 752556 ??????? S??? 05:33?? 0:16 
> dovecot/config
> 
>

John Stoffel

2022-Aug-14 21:24 UTC

head link

dovecot/config processes open, and consuming all memory

>>>>> "filipe at digirati" == filipe at digirati com br
<filipe at digirati.com.br> writes:
filipe at digirati> I'm having strange behavior in dovecot 2.3.16.
filipe at digirati> It's opening dozens of dovecot/config process and
consuming all server
filipe at digirati> memory. Normally each process consumes between 700Mb and
1Gb of ram.

filipe at digirati> Would anyone have an idea about this?

filipe at digirati> service config {
filipe at digirati>  ? vsz_limit = 2048M
filipe at digirati>  ? idle_kill = 60s
filipe at digirati>  ? service_count = 1024
filipe at digirati> }

I wonder why you have the service count so high?  I'd drop it down, or
do you really have 1025 connections in 60 seconds?
>From the docs:

     service_count

     Number of client connections to handle until the process kills
     itself. 0 means unlimited. 1 means only a single connection is handled
     until the process is stopped - this is the most secure choice since
     there?s no way for one connection?s state to leak to the next one. For
     better performance this can be set higher, but ideally not unlimited
     since more complex services can have small memory leaks and/or memory
     fragmentation and the process should get restarted eventually. For
     example 100..1000 can be good values.

So maybe drop it down to 100 for now and see how that works for you.  


filipe at digirati> pstree
filipe at digirati> systemd???ModemManager???2*[{ModemManager}]
filipe at digirati>  ??????? ??agetty
filipe at digirati>  ??????? ??cron
filipe at digirati>  ??????? ??dbus-daemon
filipe at digirati>  ??????? ??dovecot???anvil
filipe at digirati>  ??????? ????????? ??6*[auth]
filipe at digirati>  ??????? ????????? ??46*[config]
filipe at digirati>  ??????? ????????? ??1212*[imap]
filipe at digirati>  ??????? ????????? ??155*[imap-login]
filipe at digirati>  ??????? ????????? ??12*[lmtp]
filipe at digirati>  ??????? ????????? ??38*[log]
filipe at digirati>  ??????? ????????? ??10*[managesieve]
filipe at digirati>  ??????? ????????? ??19*[pop3]
filipe at digirati>  ??????? ????????? ??3*[pop3-login]
filipe at digirati>  ??????? ????????? ??18*[stats]


filipe at digirati> root?????? 45831? 0.0? 1.1 774688 752732 ??????? S???
09:31 0:31
filipe at digirati> dovecot/config
filipe at digirati> root????? 388792? 0.0? 1.1 775060 753276 ??????? S???
14:00?? 0:15
filipe at digirati> dovecot/config
filipe at digirati> root????? 510685? 0.0? 1.1 775384 753604 ??????? S???
15:06?? 0:20
filipe at digirati> dovecot/config
filipe at digirati> root????? 675638? 0.0? 1.1 775348 753620 ??????? S???
16:56?? 0:15
filipe at digirati> dovecot/config
filipe at digirati> root????? 795375? 0.0? 1.1 775460 753516 ??????? S???
18:03?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root????? 798754? 0.2? 1.1 775592 753712 ??????? S???
18:05?? 0:30
filipe at digirati> dovecot/config
filipe at digirati> root???? 1082696? 0.2? 1.1 774892 753216 ??????? S???
21:10?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1098433? 0.4? 1.1 774924 753244 ??????? S???
21:33?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1109255? 0.9? 1.1 774924 753344 ??????? S???
21:50?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1112976? 2.0? 1.1 774956 753528 ??????? S???
21:57?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1114137? 3.0? 1.1 775028 753308 ??????? S???
21:59?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1115382? 5.4? 1.1 774924 753496 ??????? S???
22:01?? 0:06
filipe at digirati> dovecot/config
filipe at digirati> root???? 1883627? 0.0? 1.1 759120 728832 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 1889705? 0.0? 1.8 1251460 1221872 ????? S???
Aug11?? 0:11
filipe at digirati> dovecot/config
filipe at digirati> root???? 1895022? 0.0? 1.8 1253280 1224284 ????? S???
Aug11?? 0:11
filipe at digirati> dovecot/config
filipe at digirati> root???? 1900690? 0.0? 1.8 1255684 1227528 ????? S???
Aug11?? 0:12
filipe at digirati> dovecot/config
filipe at digirati> root???? 1905648? 0.0? 1.8 1257880 1229912 ????? S???
Aug11?? 0:12
filipe at digirati> dovecot/config
filipe at digirati> root???? 1910857? 0.0? 1.8 1259156 1231552 ????? S???
Aug11?? 0:12
filipe at digirati> dovecot/config
filipe at digirati> root???? 1914332? 0.0? 1.1 764328 736552 ??????? S???
Aug11?? 0:20
filipe at digirati> dovecot/config
filipe at digirati> root???? 2343896? 0.0? 1.8 1259472 1231516 ????? S???
Aug11?? 0:12
filipe at digirati> dovecot/config
filipe at digirati> root???? 2346351? 0.0? 1.8 1259472 1231836 ????? S???
Aug11?? 0:13
filipe at digirati> dovecot/config
filipe at digirati> root???? 2348559? 0.0? 1.1 764704 736440 ??????? S???
Aug11?? 0:14
filipe at digirati> dovecot/config
filipe at digirati> root???? 2445701? 0.0? 1.1 764276 736540 ??????? S???
Aug11?? 0:19
filipe at digirati> dovecot/config
filipe at digirati> root???? 2572525? 0.0? 1.1 764640 736880 ??????? S???
Aug11?? 0:18
filipe at digirati> dovecot/config
filipe at digirati> root???? 2734251? 0.0? 1.1 764776 737696 ??????? S???
Aug11?? 0:08
filipe at digirati> dovecot/config
filipe at digirati> root???? 2740980? 0.0? 1.1 764768 737244 ??????? S???
Aug11?? 0:17
filipe at digirati> dovecot/config
filipe at digirati> root???? 2899925? 0.0? 1.1 764624 737760 ??????? S???
Aug11?? 0:43
filipe at digirati> dovecot/config
filipe at digirati> root???? 3517063? 0.0? 1.1 764984 738004 ??????? S???
Aug11?? 0:09
filipe at digirati> dovecot/config
filipe at digirati> root???? 3541465? 0.0? 1.1 765224 738756 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3545589? 0.0? 1.1 766452 740408 ??????? S???
Aug11?? 0:06
filipe at digirati> dovecot/config
filipe at digirati> root???? 3549259? 0.0? 1.1 766796 741048 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3553902? 0.0? 1.1 767812 742284 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3558080? 0.0? 1.1 768440 743524 ??????? S???
Aug11?? 0:08
filipe at digirati> dovecot/config
filipe at digirati> root???? 3562091? 0.0? 1.1 769224 744424 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3568721? 0.0? 1.1 769388 744888 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3573024? 0.0? 1.1 770048 745904 ??????? S???
Aug11?? 0:08
filipe at digirati> dovecot/config
filipe at digirati> root???? 3578416? 0.0? 1.1 770836 746736 ??????? S???
Aug11?? 0:06
filipe at digirati> dovecot/config
filipe at digirati> root???? 3581765? 0.0? 1.1 771948 748492 ??????? S???
Aug11?? 0:06
filipe at digirati> dovecot/config
filipe at digirati> root???? 3585837? 0.0? 1.1 772828 749860 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3590276? 0.0? 1.1 773560 750520 ??????? S???
Aug11?? 0:07
filipe at digirati> dovecot/config
filipe at digirati> root???? 3594640? 0.0? 1.1 774612 752552 ??????? S???
Aug11?? 0:08
filipe at digirati> dovecot/config
filipe at digirati> root???? 3597417? 0.0? 1.1 774968 753076 ??????? S???
Aug11?? 0:35
filipe at digirati> dovecot/config
filipe at digirati> root???? 4116314? 0.0? 1.9 1280496 1258580 ????? S???
05:31?? 0:13
filipe at digirati> dovecot/config
filipe at digirati> root???? 4118115? 0.0? 1.1 774688 752556 ??????? S???
05:33?? 0:16
filipe at digirati> dovecot/config

dovecot - Aug 2022 - dovecot/config processes open, and consuming all memory

dovecot/config processes open, and consuming all memory

dovecot/config processes open, and consuming all memory

dovecot/config processes open, and consuming all memory