Dovecot Version: 2.3.2.1

Hello Mailing List,

We are having a random issue in a couple of our production servers, where one of the child processes randomly dies with an out of memory error (see below):

Nov 26 11:58:17 config: Fatal: pool_system_malloc(8192): Out of memory Nov 26 11:58:17 pop3-login: Fatal: Error reading configuration: read(/var/run/dovecot/config) failed: EOF Nov 26 11:58:17 config: Fatal: master: service(config): child 29696 returned error 83 (Out of memory (service config { vsz_limit=2048 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)

We only use dovecot for internal application POP3 mail access from a mailbox, and there is under 10 connecting applications. Have have gradually increased the vsz_limit from the default of 256mb up to 2GB now. Is there anything else that should/could be changed instead of continuing to through memory at it?

# dovecot -n # 2.3.2.1 (0719df592): /etc/dovecot/dovecot.conf # OS: Linux 3.10.0-862.11.6.el7.x86_64 x86_64 CentOS Linux release 7.5.1804 (Core) # Hostname: doveconf: Warning: please set ssl_dh= /etc/dovecot/dh.pem auth_cache_size = 10 M auth_verbose = yes base_dir = /var/run/dovecot/ default_vsz_limit = 2 G instance_name = EMX Pop Mailstore listen = log_path = /var/log/dovecot-echo.log login_greeting = Pop3 MailServer Ready. login_trusted_networks = mail_location = maildir:~/Maildir namespace inbox { inbox = yes location = mailbox Drafts { special_use = \Drafts } mailbox Junk { special_use = \Junk } mailbox Sent { special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { special_use = \Trash } prefix = } passdb { args = cache_key=%u driver = pam } protocols = pop3 ssl_cert =

Thanks,

Kevin