Issue #2534 has been updated by ftigeot. Status changed from New to Resolved % Done changed from 0 to 100
The issue seems to be resolved indeed, I couldn't reproduce it with today's kernel. The current number of mbuf clusters in use doesn't grow bigger than the maximum limit anymore. Thanks for the tip! ---------------------------------------- Bug #2534: Network connections freeze with heavy email traffic http://bugs.dragonflybsd.org/issues/2534 Author: ftigeot Status: Resolved 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
