ptloader crashes with allocate memory failure

[Jan Kowalsky]

Hi all,

suddenly, I got the following errors in my mail.log:

May  2 21:18:05 mail ptloader[3980]: IOERROR: mapping
/srv/imap/config/ptclient/ptscache.db file: Cannot allocate memory
May  2 21:18:05 mail ptloader[3980]: failed to mmap
/srv/imap/config/ptclient/ptscache.db file
May  2 21:18:06 mail imap[22973]: ptload(): empty response from ptloader
server
May  2 21:18:06 mail imap[22973]: ptload failed: but canonified
user at example.org -> user at example.org
May  2 21:18:06 mail master[23363]: process type:SERVICE name:ptloader
path:/usr/lib/cyrus-imapd/ptloader age:179324.683s pid:3980 exited,
status 75
May  2 21:18:06 mail master[23363]: service ptloader/unix pid 3980 in
READY state: terminated abnormally
May  2 21:18:06 mail master[23363]: too many failures for service
ptloader/unix, disabling until next SIGHUP
May  2 21:18:06 mail imap[22376]: twoskip: recovered
/srv/imap/config/ptclient/ptscache.db (499 records, 1185328 bytes) in
0.063 seconds - fixed 4 offsets


Ptloader crached and for any user I got entries like this:

ptload(): can't connect to ptloader server: Connection refused
ptload failed: but canonified user at example.org -> user at example.org

Our mailserver has about 6G Ram for a few hundred users. This shouldn't
be to less.

Any Idea or similar problems?

Kind Regards
Jan