DragonFly BSD
DragonFly bugs List (threaded) for 2013-03
[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]

[DragonFlyBSD - Bug #2534] Network connections freeze with heavy email traffic


From: Francois Tigeot via Redmine <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 27 Mar 2013 00:42:14 -0700

Issue #2534 has been reported by ftigeot.

----------------------------------------
Bug #2534: Network connections freeze with heavy email traffic
http://bugs.dragonflybsd.org/issues/2534

Author: ftigeot
Status: New
Priority: Normal
Assignee: 
Category: 
Target version: 


When under heavy load (receiving a stream of mails at 1Gb/s from a LAN machine), network connections freeze on a mail relay machine.
This machine is also a PPP/ADSL router.

The console shows this message:
    Warning, objcache(cluster mbuf): Exhausted!

netstat -m output:
    5306/4480 mbuf clusters in use (current/max)

Some processes (most often ppp and sendmail) end up in a weird state, as shown by these top outputs:

  PID USERNAME   NICE  SIZE    RES    STATE CPU  TIME   CTIME    CPU COMMAND
 1879 root         0    14M  2864K     CPU0  0   0:00    0:00  0.34% top
  260 root         0    24M  2476K  tunread  2   0:05    0:05  0.00% ppp

  PID USERNAME   NICE  SIZE    RES    STATE CPU  TIME   CTIME    CPU COMMAND
82699 ftigeot      0    15M  2872K     CPU3  3   0:00    0:00  0.39% top
  265 root         0    25M  1172K objcache  1 154:06  154:06  0.00% ppp

Only a reboot allows the machine to resume network operations.


A core dump is available in leaf:~ftigeot/crash/crash.objcache




-- 
You have received this notification because you have either subscribed to it, or are involved in it.
To change your notification preferences, please click here: http://bugs.dragonflybsd.org/my/account



[Date Prev][Date Next]  [Thread Prev][Thread Next]  [Date Index][Thread Index]