On 24 Oct 2015, at 14:59, Sebastian Wolfgarten <sebast...@wolfgarten.com> wrote:
>
> Dear all,
>
> I am using Dovecot 2.2.19 and I keep on getting the following warnings in my
> mail.log file on FreeBSD 10:
>
> Oct 24 10:45:28 server1 dovecot: imap: Error: GC Warning: Repeated allocation
> of very large block (appr. size 20480):
> Oct 24 10:45:28 server1 dovecot: imap: Error: May lead to memory leak
> and poor performance.
>
> I am wondering whether this is a configuration issue (i.e. a mistake in my
> current config) or whether I am hitting a bug. What’s the best way of
> figuring this one out? I tried increasing the verbosity of the logs but it
> did not really provide me with further information.
I guess you have configured Dovecot --with-gc? I guess it's possible this is a
bug, but it could just as well be a false alarm. In general I don't
recommend/support --with-gc option (and I should probably just remove it
altogether). The easiest and the most usable way of finding memory leaks is to
run with valgrind (which must be done without-gc):
service imap {
executable = /usr/bin/valgrind -q --show-reachable=yes --leak-check=full
/usr/libexec/dovecot/imap
}
I'm not aware of any memory leaks right now.
