Increasing number of "requests for jumbo clusters denied" in netstat -m

[Eugene Grosbein]

Tim Chen wrote:

> That machine is serving as a mail and web server. Recently I found that the
> number of "requests for jumbo clusters denied" in netstat -m increases all
> the time.
> 
> 1031/3469/4500 mbufs in use (current/cache/total)
> 510/3326/3836/32768 mbuf clusters in use (current/cache/total/max)
> 510/2278 mbuf+clusters out of packet secondary zone in use (current/cache)
> 1/1453/1454/8704 4k (page size) jumbo clusters in use
> (current/cache/total/max)
> 510/1086/1596/4352 9k jumbo clusters in use (current/cache/total/max)
> 0/0/0/2176 16k jumbo clusters in use (current/cache/total/max)
> 5871K/23105K/28977K bytes allocated to network (current/cache/total)
> 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
> 0/4337166/0 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

Look at "sysctl kern.ipc | fgrep nmb"

Just increase limit (if you have enough memory :-)