503 Service Temporarily Unavailable

[Alexander Sobcanyuk]

Привет

Стала вылезать такая фигня

503 Service Temporarily Unavailable
nginx/0.6.17

При этом 

Active connections: 202 
server accepts handled requests
 48996473 48996473 78478163 
Reading: 0 Writing: 151 Waiting: 51 

netstat -m
6353/997/7350 mbufs in use (current/cache/total)
3508/436/3944/25600 mbuf clusters in use (current/cache/total/max)
3508/162 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)
8604K/1121K/9725K bytes allocated to network (current/cache/total)
509858795/649818927/647621674 requests for mbufs denied
(mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
2606/6164/10240 sfbufs in use (current/peak/max)
0 requests for sfbufs denied
0 requests for sfbufs delayed
24979920 requests for I/O initiated by sendfile
165731 calls to protocol drain routines

FreeBSD 6.1

Чтобы это могло значить?

спасибо