error: reexec socketpair: No buffer space available

[chris]

Hi guys,
I'm seeing these errors in /var/log/messages recently;

sshd[26794]: error: reexec socketpair: No buffer space available

This leads to delays in logging in via ssh and other problems such as not being able to connect to the local database server. My initial thoughts were to look at the mbuf usage but I couldn't see any problems here;

root# netstat -mb
8421/14244/22665 mbufs in use (current/cache/total)
388/674/1062/40960 mbuf clusters in use (current/cache/total/max)
388/547 mbuf+clusters out of packet secondary zone in use (current/cache)
12/370/382/12800 4k (page size) jumbo clusters in use (current/cache/total/max)
0/0/0/6400 9k jumbo clusters in use (current/cache/total/max)
0/0/0/3200 16k jumbo clusters in use (current/cache/total/max)
2935K/6389K/9324K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0/230/6656 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
45353 requests for I/O initiated by sendfile
0 calls to protocol drain routines

Does anyone have any suggestions? This machine is a 7.1-RELEASE-p6

Thanks,
Chris