[Dovecot] No buffer space available
Hi,
I'm running Dovecot 1.1.3 on FreeBSD 7.0. In the past couple days, I've been seeing errors like this:
Sep 9 08:43:51 sysvol dovecot: pop3-login: socketpair() failed: No buffer space available Sep 9 08:43:51 sysvol dovecot: pop3-login: socket(default) failed: No buffer space available Sep 9 08:43:51 sysvol dovecot: pop3-login: Can't connect to auth server at default: No buffer space available Sep 9 08:25:15 sysvol dovecot: pop3-login: socketpair() failed: No buffer space available pop3-login: Can't connect to auth server at default: No buffer space available
What ends up happening is that the port doesn't accept any new connections until there is enough buffer space.
Yesterday, I saw it a LOT with POP3 and changed my config login processes: login_process_per_connection: no login_process_size: 256 login_processes_count: 6 This seemed to clear up the issues, but now it's occurring again this morning.
I haven't had any of these since I made that change either.. So there's some progress... : Sep 8 12:53:40 sysvol dovecot: Temporary failure in creating login processes, slowing down for now
TOP shows: Mem: 267M Active, 5558M Inact, 1637M Wired, 217M Cache, 214M Buf, 87M Free Swap: 4096M Total, 4096M Free
At this time, there are 120 imap processes, 10 POP and 1 dovecot and 1
dovecot-auth
pop and imap both have 6 login processes.
It doesn't seem like a load issue, but obviously something is set too
low or unavailable...
It's fixed for a period of time when I restart dovecot. I did a netstat -m prior to restart, and after restart, and the only main difference was this line: Before: 11/414/425/12800 4k (page size) jumbo clusters in use (current/cache/total/max) After: 0/425/425/12800 4k (page size) jumbo clusters in use (current/cache/total/max) (After about 5 minutes 'current' went to 3)
This machine also runs NFSd and MySQL.
Any ideas?
Thanks, Rick
I forgot to add that I also upgraded from 1.1.1 to 1.1.3 yesterday in
an attempt to fix the problem.
On Sep 9, 2008, at 8:58 AM, Rick Romero rick@havokmon.com wrote:
Hi,
I'm running Dovecot 1.1.3 on FreeBSD 7.0. In the past couple
days, I've been seeing errors like this:Sep 9 08:43:51 sysvol dovecot: pop3-login: socketpair() failed: No
buffer space available Sep 9 08:43:51 sysvol dovecot: pop3-login: socket(default) failed:
No buffer space available Sep 9 08:43:51 sysvol dovecot: pop3-login: Can't connect to auth
server at default: No buffer space available Sep 9 08:25:15 sysvol dovecot: pop3-login: socketpair() failed: No
buffer space available pop3-login: Can't connect to auth server at default: No buffer space
availableWhat ends up happening is that the port doesn't accept any new
connections until there is enough buffer space.Yesterday, I saw it a LOT with POP3 and changed my config login
processes: login_process_per_connection: no login_process_size: 256 login_processes_count: 6 This seemed to clear up the issues, but now it's occurring again
this morning.I haven't had any of these since I made that change either.. So
there's some progress... : Sep 8 12:53:40 sysvol dovecot: Temporary failure in creating login
processes, slowing down for nowTOP shows: Mem: 267M Active, 5558M Inact, 1637M Wired, 217M Cache, 214M Buf,
87M Free Swap: 4096M Total, 4096M FreeAt this time, there are 120 imap processes, 10 POP and 1 dovecot and
1 dovecot-auth pop and imap both have 6 login processes. It doesn't seem like a
load issue, but obviously something is set too low or unavailable... It's fixed for a period of time when I restart dovecot. I did a
netstat -m prior to restart, and after restart, and the only main
difference was this line: Before: 11/414/425/12800 4k (page size) jumbo clusters in use (current/cache/ total/max) After: 0/425/425/12800 4k (page size) jumbo clusters in use (current/cache/ total/max) (After about 5 minutes 'current' went to 3)This machine also runs NFSd and MySQL. Any ideas?
Thanks, Rick
On Tue, 2008-09-09 at 08:58 -0500, Rick Romero wrote:
Hi,
I'm running Dovecot 1.1.3 on FreeBSD 7.0. In the past couple days, I've been seeing errors like this:
Sep 9 08:43:51 sysvol dovecot: pop3-login: socketpair() failed: No buffer space available
Only thing I can suggest is to google for "ENOBUFS socketpair freebsd" or to ask in FreeBSD lists. I've no idea why it would return ENOBUFS. The manual page doesn't say ENOBUFS is a possible error for socketpair().
Timo Sirainen wrote:
On Tue, 2008-09-09 at 08:58 -0500, Rick Romero wrote:
Hi,
I'm running Dovecot 1.1.3 on FreeBSD 7.0. In the past couple days, I've been seeing errors like this:
Sep 9 08:43:51 sysvol dovecot: pop3-login: socketpair() failed: No buffer space available
Only thing I can suggest is to google for "ENOBUFS socketpair freebsd" or to ask in FreeBSD lists. I've no idea why it would return ENOBUFS. The manual page doesn't say ENOBUFS is a possible error for socketpair().
Got it. Thanks Timo, your search terms were better than mine.
sysvol# vmstat -z | grep sock
ITEM SIZE LIMIT USED FREE REQUESTS
FAILURES
socket: 696, 204800, 12362, 128,
82179541, 60873
My old kern.ipc.maxsockets: 12328 I was running out of Sockets.
The error was popping up multiple times per minute, now I haven't seen
one in 5 minutes.
I also found a great FreeBSD connection optimization page:
http://rerepi.wordpress.com/2008/04/19/tuning-freebsd-sysoev-rit/
Rick
participants (2)
-
Rick Romero
-
Timo Sirainen