> А что показывает "netstat -m" ?
netstat -m
73017/903/73920 mbufs in use (current/cache/total)
4394/238/4632/65536 mbuf clusters in use (current/cache/total/max)
2374/48 mbuf+clusters out of packet secondary zone in use (current/cache)
0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max)
0/0/0/0 9k jumbo clusters in use (current/cache/total/max)
0/0/0/0 16k jumbo clusters in use (current/cache/total/max)
27042K/701K/27744K 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)
65536/65536/65536 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
7727173 requests for sfbufs delayed
17820651 requests for I/O initiated by sendfile
87310 calls to protocol drain routines
Это на первом варианте конфига (т.е. без rcvbuf=131072 sndbuf=1048576).
Ждем возможности перезагрузить машину, чтоб увеличить sfbufs.