ping: sendto: No buffer space available

давно такое не встречал :)

смотрим.
zabbix-proxy# netstat -m
50/730/780 mbufs in use (current/cache/total)
32/230/262/524288 mbuf clusters in use (current/cache/total/max)
32/224 mbuf+clusters out of packet secondary zone in use (current/cache)
0/128/128/8576 4k (page size) jumbo clusters in use (current/cache/total/max)
0/0/0/4288 9k jumbo clusters in use (current/cache/total/max)
0/0/0/2144 16k jumbo clusters in use (current/cache/total/max)
76K/1154K/1231K 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)
0/0/0 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile
0 calls to protocol drain routines
zabbix-proxy#



zabbix-proxy# netstat -id
Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts Oerrs  Coll Drop
de0    1500 <Link#1>      00:15:5d:15:02:8c 26863978     0     0 26179780     0     0  906
de0    1500 91.001.002.0/ zabbix-proxy      24461808     -     - 23811747     -     -    -
de0    1500 172.19.1.48/2 172.19.1.53            103     -     -  2356689     -     -    -
ipfw0 65536 <Link#2>                               0     0     0        0     0     0    0
lo0   16384 <Link#3>                             140     0     0      140     0     0    0
lo0   16384 fe80:3::1     fe80:3::1                0     -     -        0     -     -    -
lo0   16384 localhost     ::1                      0     -     -        0     -     -    -
lo0   16384 your-net      localhost              140     -     -      140     -     -    -
zabbix-proxy#


меняем ситуацию в sysctl.conf.

net.inet.tcp.sendspace=131072
net.inet.tcp.recvspace=131072

net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.recvbuf_max=16777216

net.inet.tcp.sendbuf_inc=16384
net.inet.tcp.recvbuf_inc=524288

kern.ipc.maxsockbuf=1048576
kern.ipc.nmbclusters=524288


zabbix-proxy# vmstat -z | grep mbuf
ITEM                     SIZE     LIMIT      USED      FREE  REQUESTS  FAILURES
mbuf_packet:              256,        0,       32,      224, 27256724,        0
mbuf:                     256,        0,       14,      510, 70586157,        0
mbuf_cluster:            2048,   524288,      256,        6,      256,        0
mbuf_jumbo_page:         4096,     8576,        0,      128,  1076992,        0
mbuf_jumbo_9k:           9216,     4288,        0,        0,        0,        0
mbuf_jumbo_16k:         16384,     2144,        0,        0,        0,        0
mbuf_ext_refcnt:            4,        0,        0,        0,        0,        0


при этом уже добавив

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