RE: CPU LOAD

Hum,
With some more play with strace, i've attached a pop3d
process:

This "(Resource temporarily unavailable)" is harm
?


nobody   14883  0.0  0.3   7332  1692 ?        S    12:34  
0:00
dbmail-pop3d -f /etc/dbmail.conf -p
/var/run/dbmail-pop3d.pid

lira:/usr/local/src/postfix/dbmail_svn# strace -p 14883
Process 14883 attached - interrupt to quit
select(9, [5 8], NULL, NULL, NULL)      = 1 (in [5])
accept(5, 0xbfef94e8, [16])             = -1 EAGAIN
(Resource temporarily
unavailable)
poll([{fd=10, events=POLLIN|POLLPRI}], 1, 0) = 0
write(10, "116", 5)             = 5
read(10, "712", 16384) = 11
fcntl64(6, F_SETLK64, {type=F_RDLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9414) = 0
fcntl64(6, F_SETLK64, {type=F_UNLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9414) = 0
fcntl64(6, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9444) = 0
fcntl64(6, F_SETLK64, {type=F_UNLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9474) = 0
select(9, [5 8], NULL, NULL, NULL)      = 1 (in [5])
accept(5, 0xbfef94e8, [16])             = -1 EAGAIN
(Resource temporarily
unavailable)
poll([{fd=10, events=POLLIN|POLLPRI}], 1, 0) = 0
write(10, "116", 5)             = 5
read(10, "712", 16384) = 11
fcntl64(6, F_SETLK64, {type=F_RDLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9414) = 0
fcntl64(6, F_SETLK64, {type=F_UNLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9414) = 0
fcntl64(6, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9444) = 0
fcntl64(6, F_SETLK64, {type=F_UNLCK, whence=SEEK_SET,
start=0, len=1},
0xbfef9474) = 0
select(9, [5 8], NULL, NULL, NULL)      = 1 (in [5])
accept(5, 0xbfef94e8, [16])             = -1 EAGAIN
(Resource temporarily
unavailable)
poll([{fd=10, events=POLLIN|POLLPRI}], 1, 0) = 0
write(10, "116", 5)             = 5
read(10, "712", 16384) = 11






-----Original Message-----
From: dbmail-bouncesdbmail.org [mailto:dbmail-bouncesdbmail.org] On Behalf
Of Jorge Bastos
Sent: quinta-feira, 4 de Outubro de 2007 12:17
To: 'DBMail mailinglist'
Subject: RE: [Dbmail] CPU LOAD

PORT=24                           # the port number the
dbmail-lmtpd server
has to bind to.
NCHILDREN=20                      # default number of LMTP
handlers (each is
a process)
MAXCHILDREN=20                    # max. number of LMTP
handlers
MINSPARECHILDREN=15
MAXSPARECHILDREN=15
MAXCONNECTS=10000                 # the maximum number of
connections a
default childs makes
TIMEOUT=300     


Server during work time, is very very busy


Before change postfix master.conf configuration, I have:

lmtp      unix  -       -       -       -       -      
lmtp

wich I belive it's the defaults 'cause I didn't changed
them.
Like this it's unlimited right?
Tunning to:
lmtp      unix  -       -       n       -       3      
lmtp

means that postfix will only have 3 lmtp process's to
dbmail, right?


-----Original Message-----
From: dbmail-bouncesdbmail.org [mailto:dbmail-bouncesdbmail.org] On Behalf
Of Paul J Stevens
Sent: quinta-feira, 4 de Outubro de 2007 10:34
To: DBMail mailinglist
Subject: Re: [Dbmail] CPU LOAD

Jorge Bastos wrote:
> Wait i got something from one os the dbmail-lmtpd
processes, see it this
> tell's you something?
> 
> fcntl64(6, F_SETLK64, {type=F_RDLCK, whence=SEEK_SET,
start=0, len=1},
> 0xbffcdd84) = 0

That's the process pool's locking code.

How many lmtpd processes are you running???

You will rarely need more than a few lmtpd processes (2-4),
unless you have
a
very busy server.

Even then: excessive amounts of lmtpd processes or even
multiple simulaneous
dbmail-smtp based injections can lead to deadlocks in mysql
during message
insertion. I've been trying to fix that recently. Update to
the latest in
the
2.2 branch to include those changes. Your problem is not
caused by any
post-rc2
changes.

Narrow your lmtp bandwidth by tuning the maxproc field in
master.cf:

lmtp      unix  -       -       n       -       3      
lmtp

on your receiving postfix installation.

-- 
 
____________________________________________________________
____
  Paul Stevens                                      paul at
nfg.nl
  NET FACILITIES GROUP                     GPG/PGP:
1024D/11F8CD31
  The Netherlands________________________________http://www.nfg.nl
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