[FUG-BR] No buffer space "emX"

[Felipe N. Oliva]

Senhores, estou com o seguinte problema:

FreeBSD 8.2-STABLE

Trafego:

      em0                 em1                ipfw0
 Kbps in  Kbps out   Kbps in  Kbps out   Kbps in  Kbps out
89343.66  10984.74  12032.96  163709.1      0.00      0.00
73986.44   9453.57  11249.74  162776.1      0.00      0.00
82020.52  10619.25  11970.38  160399.4      0.00      0.00
79602.59  10026.42  11442.68  162006.7      0.00      0.00
74788.55  10141.10  12120.73  164523.2      0.00      0.00
81153.43  10439.89  11903.59  162613.0      0.00      0.00
80163.62  10575.31  11866.03  165640.7      0.00      0.00
80444.00  10124.54  11401.45  157874.0      0.00      0.00
82067.25  10113.48  11423.59  157767.8      0.00      0.00
84670.40  11147.81  12452.23  164365.0      0.00      0.00
72053.35  10117.19  11889.06  157832.0      0.00      0.00
77526.03  10476.41  12242.77  158083.3      0.00      0.00
73478.33  10274.84  11725.72  160038.8      0.00      0.00
81260.33  10566.81  12079.98  166000.9      0.00      0.00
77436.60  10688.88  12278.61  166983.2      0.00      0.00
74916.26  10261.82  12594.53  163375.1      0.00      0.00

# netstat -m
58413/1827/60240 mbufs in use (current/cache/total)
28910/642/29552/133120 mbuf clusters in use (current/cache/total/max)
28909/138 mbuf+clusters out of packet secondary zone in use (current/cache)
26016/328/26344/131072 4k (page size) jumbo clusters in use
(current/cache/total/max)
0/0/0/16640 9k jumbo clusters in use (current/cache/total/max)
0/0/0/8320 16k jumbo clusters in use (current/cache/total/max)
176489K/3052K/179542K 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
4 requests for I/O initiated by sendfile
0 calls to protocol drain routines

Ja realizamos os seguintes tunings:

sysctl.conf
net.inet.tcp.recvbuf_max=524288
net.inet.tcp.sendbuf_max=524288
net.inet.ip.intr_queue_maxlen=512
net.route.netisr_maxqlen=512
net.inet.flowtable.enable=0
kern.ipc.maxsockbuf=384000
net.inet.tcp.sendspace=131072
net.inet.tcp.recvspace=131072
kern.ipc.nmbclusters=133120
kern.ipc.nmbjumbop=131072

loader.conf
net.link.ifqmaxlen=1024
net.isr.direct=1
net.isr.bindthreads=1
net.isr.numthreads=4
net.isr.defaultqlimit=4096

Porem, de vez em sempre a interface para de responder, ou melhor responde
isso: "No buffer space available".

Alguem ja passou por isso?

-- 
Felipe N. Oliva
C & N Soluções em Tecnologia
Admin. de Sistemas/Redes
www.cnsolucoes.com.br