Check dovecot service status memory usage and since it was started, if
its over available RAM, restarting the service every now and then might
fix this, if its below RAM limit, it could be other services leaving
dovecot without enough RAM, and if it wasnt a bug or misconfiguration in
dovecot performance, refer to
https://doc.dovecot.org/2.3/configuration_manual/performance_tuning/,
then increasing dovecot service CPU and Memory limit might help.
On 2025-02-05 12:15, Michael via dovecot wrote:
hey, :)
i have a postfix instance trying to deliver a message to dovecot via
lmtp, but fails due to an out-of-memory error in dovecot:
the message is generated by a cron job like a thousand times before,
and hundreds of times afterwards. the only thing maybe worth mentioning
is its size of ~80MB. but since i don't have any size limits
configured, i don't see why it shouldn't be delivered.
any hints are appreciated!
greetings...
# dovecot --version
2.3.21.1 (d492236fa0)
# cat /etc/apt/sources.list.d/dovecot.list
#deb http://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye
main
deb https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye
main
postfix log:
Feb 5 12:21:42 mail01 postfix/qmgr[1175]: B95E360E5C: from=,
size=85100558, nrcpt=1 (queue active)
Feb 5 12:21:43 mail01 postfix/lmtp[3990]: B95E360E5C: to=, orig_to=,
relay=mail01.example.com[private/dovecot-lmtp], delay=3265236,
delays=3265235/0.01/0.01/1.1, dsn=4.4.2, status=deferred (lost
connection with mail01.example.com[private/dovecot-lmtp] while sending
end of data -- message may be sent more than once)
dovecot log:
/var/log/dovecot/dovecot-lmtp.log:Feb 05 12:21:43
lmtp(r...@example.com): Fatal: block_alloc(134217728): Out of memory
/var/log/dovecot/dovecot-lmtp.log:Feb 05 12:21:43
lmtp(r...@example.com): Error: Raw backtrace:
/usr/lib/dovecot/libdovecot.so.0(backtrace_append+0x42)
[0x7f439cc1e662] ->
/usr/lib/dovecot/libdovecot.so.0(backtrace_get+0x1e) [0x7f439cc1e77e]
-> /usr/lib/dovecot/libdovecot.so.0(+0x1043db) [0x7f439cc2b3db] ->
/usr/lib/dovecot/libdovecot.so.0(+0x104411) [0x7f439cc2b411] ->
/usr/lib/dovecot/libdovecot.so.0(+0x5688f) [0x7f439cb7d88f] ->
/usr/lib/dovecot/libdovecot.so.0(+0x5ae87) [0x7f439cb81e87] ->
/usr/lib/dovecot/libdovecot.so.0(+0x1245ac) [0x7f439cc4b5ac] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(+0x2f524) [0x7f439c30b524] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(+0x307e9) [0x7f439c30c7e9] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_message_body_get_text+0x4a)
[0x7f439c30d40a] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(ext_body_get_part_list+0x51)
[0x7f439c34a3e1] -> /usr/lib/dovecot/libdovecot-sieve.so.0(+0x6ebc2)
[0x7f439c34abc2] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x9a)
[0x7f439c320cda] ->
/usr/lib/dovecot/libdovecot-sieve.so.0(sieve_multiscript_run+0x92)
[0x7f439c338202] ->
/usr/lib/dovecot/modules/lib90_sieve_plugin.so(+0x39ba)
[0x7f439c3a99ba] ->
/usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0x179)
[0x7f439ce6f8d9] -> dovecot/lmtp(lmtp_local_default_deliver+0x1d4)
[0x55c39e8ec724] -> dovecot/lmtp(lmtp_local_data+0x5ac)
[0x55c39e8ece7c] -> dovecot/lmtp(client_default_cmd_data+0x18d)
[0x55c39e8eb83d] -> dovecot/lmtp(cmd_data_continue+0x180)
[0x55c39e8eb5d0] -> /usr/lib/dovecot/libdovecot.so.0(+0x7628b)
[0x7f439cb9d28b] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x69) [0x7f439cc41609]
-> /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x132)
[0x7f439cc42cf2] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x50)
[0x7f439cc416b0] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x40)
[0x7f439cc41870] ->
/usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13)
[0x7f439cbb38e3] -> dovecot/lmtp(main+0x22a) [0x55c39e8ea27a] ->
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xea)
[0x7f439c972d7a] -> dovecot/lmtp(_start+0x2a) [0x55c39e8ea38a]
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