message in /var/log/messages

Michael Bacon baconm at duke.edu
Thu Apr 3 09:01:11 EST 2003 

It all depends on how many simultaneous connections you're trying to serve. 
If you only need to serve a couple hundred, you're going to be fine with 
this.  However, if you're going to get up past 3-400 simultaneous 
connections, the master is going to start to need to have more file 
descriptors open in order to maintain communication with the worker 
threads.  I'm having trouble remembering off the top of my head what order 
the open file descriptor number is going to be in relation to the 
connections, but if you have more than 1024 simultaneous connections, you 
will certainly run into this.

If you're on a small site, then you'll be fine, and can just ignore these. 
If you're on a large site, particularly with most users keeping imap 
connections open all the time, you might bump up against the max file 
descriptors problem.  It's your call.

Michael

--On Thursday, April 03, 2003 1:44 AM -0800 Nicolas Gauvrit 
<nicomut at yahoo.com> wrote:

>
> I m running a Red Hat Psyche 8.0
> ("fully updated")
>
>
>
>
>
> i've found this :
>
> http://asg.web.cmu.edu/cyrus/download/imapd/faq.html
>
> Q: I'm getting messages in imapd.log like:
> Sep 11 17:23:55 ogg lmtpd[773]: DBERROR db3: 16
> lockers
> Sep 11 17:23:55 ogg lmtpd[1409]: DBERROR db3: 17
> lockers
> Sep 11 17:23:56 ogg lmtpd[1508]: DBERROR db3: 9
> lockers
> Sep 11 17:23:56 ogg lmtpd[776]: DBERROR db3: 9 lockers
> What's wrong?
> A: Nothing is wrong. These messages are logged
> whenever Berkeley db encounters lock contention, but
> isn't necessarily a problem by themselves. This is
> especially likely when you have an empty or small
> duplicate delivery database and are receiving a large
> volume of e-mail.
>
> Berkeley db 4.0 has a bug where the number of lockers
> isn't decremented properly, causing this number to be
> unreliable.
>
>
> and this :
>
> http://www.irbs.net/internet/info-cyrus/0211/0174.html
>
> On Wed, 13 Nov 2002, Andrei Loukinykh wrote:
>
>> Well, now I have Cyrus installed (yet not completely
> tested though)
>> The only 2 things left, which are bothering me now ,
> 2 king of messages
>> in syslog:
>>
>> 1:
>> "lmtpd[10260]: DBERROR db4: 9 lockers"
>
> These are usually harmless, unless they go up in a
> sudden spike or are
> accompanied by other problems, its ok.
>
>> 2:
>> "master: setrlimit: Unable to set file descriptors
> limit to
>> -1: Operation not permitted"
>
> This is also mostly harmless, it indicates that cyrus
> was unable to
> unlimit its max # of file descriptors, which is
> generally ok.
>
>> But, may be there's something I can do to fix those
> bugs , to live with
>> clean logs...?
>
> change the code? turn off logging? Since the setrlimit
> one only occurs
> at startup, it shouldn't be that big a deal. I can see
> the DBERROR one
> being more annoying I guess, but it would require a
> change to the code.
>
> -Rob
>
>
>
>
>
>
>
> So i don't think this is really a problem .. ?? isn't
> it ?
>
>
>
> Best regards
>
>
>
> --- Michael Bacon <baconm at duke.edu> wrote:
>> What operating system?
>>
>> --On Wednesday, April 02, 2003 10:26 PM -0800
>> Nicolas Gauvrit
>> <nicomut at yahoo.com> wrote:
>>
>> > Hi,
>> >
>> > i post this message yesterday, but i got no
>> answer...
>> > (is my question to stupid for you ?)
>> >
>> > i'd like to know what does mean those message,
>> > is i do something wrong ?
>> >
>> > is my Cyrus Imap will work fine, even if i got
>> thoses
>> > Error messages ?
>> >
>> > i was searching several hours, but i do not found
>> > anything yet...
>> >
>> > Apr  1 07:04:29 ilemadame master: setrlimit:
>> Unable to
>> > set file descriptors limit to -1: Operation not
>> > permitted
>> > Apr  1 07:04:29 ilemadame master: retrying with
>> 1024
>> > (current max)
>> >
>> > Apr  1 07:04:40 ilemadame lmtpd[1177]: DBERROR
>> db4: 7
>> > lockers
>> > Apr  1 07:04:40 ilemadame pop3d[1176]: DBERROR
>> db4: 8
>> > lockers
>> >
>> > Thank you.
>> >
>> >
>> > --- Nicolas Gauvrit <nicomut at yahoo.com> wrote:
>> >> Hi,
>> >>
>> >> i had installed cyrus-imapd-2.1.11 with options :
>> >>
>> >> ./configure  --with-auth=unix
>> >> --with-sasl=/usr/lib/sasl2
>> --with-cyrus-group=cyrus
>> >> --with-openssl=/usr/include/openssl --no-create
>> >> --no-recursion --with-mboxlist-db=skiplist
>> >>
>> >> I got those messages in /var/log/messages
>> >>
>> >> Apr  1 07:04:29 ilemadame master: setrlimit:
>> Unable
>> >> to
>> >> set file descriptors limit to -1: Operation not
>> >> permitted
>> >> Apr  1 07:04:29 ilemadame master: retrying with
>> 1024
>> >> (current max)
>> >> Apr  1 07:04:29 ilemadame master[1170]: process
>> >> started
>> >> Apr  1 07:04:29 ilemadame ctl_cyrusdb[1171]:
>> >> recovering cyrus databases
>> >> Apr  1 07:04:39 ilemadame ctl_cyrusdb[1171]: done
>> >> recovering cyrus databases
>> >> Apr  1 07:04:39 ilemadame master[1170]: ready for
>> >> work
>> >> Apr  1 07:04:39 ilemadame ctl_cyrusdb[1172]:
>> >> checkpointing cyrus databases
>> >> Apr  1 07:04:40 ilemadame lmtpd[1177]: DBERROR
>> db4:
>> >> 7
>> >> lockers
>> >> Apr  1 07:04:40 ilemadame pop3d[1176]: DBERROR
>> db4:
>> >> 8
>> >> lockers
>> >> Apr  1 07:05:17 ilemadame ctl_cyrusdb[1172]: done
>> >> checkpointing cyrus databases
>> >>
>> >>
>> >>
>> >> What does it really mean ?
>> >> is it ok ?
>> >>
>> >> i've seen ( here :
>> >>
>> >
>>
> http://www.irbs.net/internet/info-cyrus/0211/0174.html
>> >> )
>> >> that it might be not a problem, but i'd like read
>> >> your
>> >> advises
>> >>
>> >>
>> >> thank you
>> >>
>> >>
>> >>
>> >> my imapd.conf :
>> >> ---------------
>> >> configdirectory: /var/imap
>> >> partition-default: /home/cyrus/var/spool/imap
>> >> admins: cyrus
>> >> sasl_pwcheck_method: auxprop
>> >> allowanonymouslogin: no
>> >> timeout: 30
>> >> poptimeout: 30
>> >> popinpoll: 0
>> >> defaultacl: lrswipcd
>> >> sievedir: /usr/sieve
>> >> sendmail: /usr/lib/sendmail
>> >> srvtab:   /var/imap/srvtab
>> >> tls_cert_file: /var/imap/server.pem
>> >> tls_key_file: /var/imap/server.pem
>> >>
>> >> my cyrus.conf :
>> >> ---------------
>> >>
>> >>
>> >> # standard standalone server implementation
>> >>
>> >> START {
>> >>   # do not delete this entry!
>> >>   recover       cmd="ctl_cyrusdb -r"
>> >>
>> >>   # this is only necessary if using idled for
>> IMAP
>> >> IDLE
>> >> #  idled                cmd="idled"
>> >> }
>> >>
>> >> # UNIX sockets start with a slash and are put
>> into
>> >> /var/imap/sockets
>> >> SERVICES {
>> >>   # add or remove based on preferences
>> >>   imap          cmd="imapd" listen="imap"
>> prefork=5
>> >>   imaps         cmd="imapd -s" listen="imaps"
>> >> prefork=1
>> >>   pop3          cmd="pop3d" listen="pop3"
>> prefork=3
>> >>   pop3s         cmd="pop3d -s" listen="pop3s"
>> >> prefork=1
>> >>   sieve         cmd="timsieved" listen="sieve"
>> >> prefork=0
>> >>
>> >>   # at least one LMTP is required for delivery
>> >> #  lmtp         cmd="lmtpd" listen="lmtp"
>> prefork=0
>> >>   lmtpunix      cmd="lmtpd"
>> >> listen="/home/cyrus/var/imap/socket/lmtp"
>> prefork=1
>> >>
>> >>   # this is only necessary if using notifications
>> >> #  notify       cmd="notifyd"
>> >> listen="/home/cyrus/var/imap/socket/notify"
>> >> proto="udp" prefork=1
>> >> }
>> >>
>> >> EVENTS {
>> >>   # this is required
>> >>   checkpoint    cmd="ctl_cyrusdb -c" period=30
>> >>
>> >>   # this is only necessary if using duplicate
>> >> delivery
>> >> suppression
>> >>   delprune      cmd="ctl_deliver -E 3" at=0400
>> >>
>> >>   # this is only necessary if caching TLS
>> sessions
>> >>   tlsprune      cmd="tls_prune" at=0400
>> >> }
>> >>
>> >> Nicolas
>> >>
>> >>
>> __________________________________________________
>> >> Do you Yahoo!?
>> >> Yahoo! Tax Center - File online, calculators,
>> forms,
>> >> and more
>> >> http://tax.yahoo.com
>> >
>> >
>> > =====
>> > Nico
>> >  http://slysculpteur.multimania.com
>> >  ,,  // \\
>> > (_,\/ \_/ \
>> >   \ \_/_\_/>
>> >   /_/  /_/
>> > http://www.ascii-art.de/
>> >
>> > __________________________________________________
>> > Do you Yahoo!?
>> > Yahoo! Tax Center - File online, calculators,
>> forms, and more
>>
> === message truncated ===
>
>
> =====
> Nico
>  http://slysculpteur.multimania.com
>  ,,  // \\
> (_,\/ \_/ \
>   \ \_/_\_/>
>   /_/  /_/
> http://www.ascii-art.de/
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Tax Center - File online, calculators, forms, and more
> http://tax.yahoo.com

More information about the Info-cyrus mailing list