Hi Timo,
> You do mean all dovecot processes eat 100% CPU, right? And it happens
immediately after they start up?
Not all. For example, we have 2 "dovecot-auth -w". Suddenly one of them
will eat 100%. After a certain period of time (short/long, not a
constant), another will come up.
They didn't eat 100% when they start up even.
> 1) strace -tt -p <pid> output for a 10 lines or so.
Once I start 'strace' to monitor the "dovecot-auth -w", it will
immediately eat 100% and the following is the last few lines of strace
output.
I do have a ldap backend for authentication.
10:43:34.726512 time(NULL) = 1270608214
10:43:34.726561 poll([{fd=5, events=POLLIN|POLLPRI|POLLERR|POLLHUP},
{fd=-1}, {fd=-1}, {fd=12, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 4,
10000) = 1 ([{fd=12, revents=POLLIN}])
10:43:34.728355 read(12, "0\204\0\0\0\21\2\2", 8) = 8
10:43:34.728421 read(12, "\30pa\204\0\0\0\7\n\1\0\4\0\4\0", 15) = 15
10:43:34.728491 time(NULL) = 1270608214
10:43:34.728542 time(NULL) = 1270608214
10:43:34.728594 write(12,
"0\201\376\2\2\30oc\201\367\4'CN=Configuration,DC="..., 257) = 257
10:43:34.728673 time(NULL) = 1270608214
10:43:34.728723 poll([{fd=5, events=POLLIN|POLLPRI|POLLERR|POLLHUP},
{fd=-1}, {fd=-1}, {fd=12, events=POLLIN|POLLPRI|POLLERR|POLLHUP}], 4,
120000) = 1 ([{fd=12, revents=POLLIN}])
10:43:34.729401 read(12, "0\204\0\0\0R\2\2", 8) = 8
10:43:34.729465 read(12, "\30os\204\0\0\0H\4Fldap://xxx.xxx.xxx/C";..., 80)
= 80
> 2) dovecot --build-options output
Build options: ioloop=epoll notify=inotify ipv6 openssl
Mail storages: cydir dbox maildir mbox raw shared
SQL drivers:
Passdb: checkpassword pam passwd passwd-file shadow
Userdb: nss passwd passwd-file prefetch static
Yours Sincerely,
Jacky Chan
---------
CHAN Hoi Kei, Jacky
Technical and User Support Section
Information and Communication Technology Office
University of Macau
DL: (853) 8397 8629 | FAX: (853) 2883 5606
From:
Timo Sirainen <t...@iki.fi>
To:
jac...@umac.mo
Cc:
dovecot@dovecot.org
Date:
07/04/2010 上午 10:36
Subject:
Re: [Dovecot] Timeout Value
On Tue, 2010-04-06 at 12:13 +0800, jac...@umac.mo wrote:
> Dear All,
>
> I constantly encounter 'dovecot-auth', 'login-imap', 'login-pop3' and
> 'imap' processes consume 100% CPU.
> I run 'ps' and found those hanged up processes were running for a long
> time.
> I am wondering whether dovecot.conf has some configuration parameters
that
> timeout those processes (or kill those after certain period of time).
> I am using dovecot 1.2.11 on RHEL 5.3.
There is no timeout value, because those processes just shouldn't be
eating 100% CPU. Strange that all of your processes are eating 100% CPU.
You do mean all dovecot processes eat 100% CPU, right? And it happens
immediately after they start up? I guess there's something really wrong
in your installation. A few things that might show something useful:
1) strace -tt -p <pid> output for a 10 lines or so.
2) dovecot --build-options output
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