[Dovecot] No buffer space available

Rick Romero rick at havokmon.com
Tue Sep 9 19:16:18 EEST 2008

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  
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:


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