On 5/9/2018 10:15 PM, Shawn Heisey wrote:
It's been about three weeks since I asked this question. All the
information I have available says that all users have no limits on
virtual memory, so it must be dovecot itself that sets the limit. Can
that be changed in the 1.2 version? I can't upgrade to 2.x yet.
Here's an actual syslog entry, redacted to remove identifying info:
May 9 21:55:48 frodo dovecot: IMAP(REDACTED1): mmap() failed with
index cache file /home/vmail/REDACTED2/dovecot.index.cache: Cannot
allocate memory
The file that it could not mmap here is 189843456 bytes.
I may have figured it out. After a little googling to see how virtual
memory limits are set in C programs, and then some grepping of the
1.2.15 dovecot source, I saw evidence that setting the mail_process_size
value in dovecot.conf can increase the limit on virtual memory. I have
done this, and will keep an eye on the log to see if it helps.
Thanks,
Shawn
