em0 freezes on ZFS server

[Willem Jan Withagen]

On 26-2-2010 13:16, Gerrit Kühn wrote:
> On Thu, 25 Feb 2010 14:59:28 -0800 Jack Vogel<jfvogel at gmail.com>  wrote
> about Re: em0 freezes on ZFS server:
>
> JV>  The failure to "setup receive structures" means it did not have
> JV>  sufficient mbufs
> JV>  to setup the RX ring and buffer structs.
>
> I'm monitoring mbufs since I rebooted my server. Right now (after 2.5 hours
> or so of operation) the number of total clusters has already increased to
> 15k. Is this a normal behaviour for a relatively idle server or will it
> inevitably go through the roof in some more hours?
>
>
> Every 1s: netstat -m                                    Fri Feb 26
> 13:14:54 2010
>
> 15001/2279/17280 mbufs in use (current/cache/total)
> 13970/1212/15182/64000 mbuf clusters in use (current/cache/total/max)
> 13970/750 mbuf+clusters out of packet secondary zone in use (current/cache)
> 0/119/119/12800 4k (page size) jumbo clusters in use
> (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use
> (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use
> (current/cache/total/max) 31690K/3469K/35160K 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
> 3 requests for I/O initiated by sendfile
> 0 calls to protocol drain routines

Well it could be coincidence, but mine are around 15k as well:

15921/3669/19590 mbufs in use (current/cache/total)
15308/2678/17986/51200 mbuf clusters in use (current/cache/total/max)
14754/862 mbuf+clusters out of packet secondary zone in use (current/cache)

System is up since last night, and has taken a few Gb in rsync-backup and 
several compile jobs.
Hasn't given me trouble (yet).

--WjW