Date: Fri, 23 May 2003 15:07:56 -0400 From: "Michael R. Wayne" <wayne@staff.msen.com> To: freebsd-hackers@FreeBSD.ORG Subject: mbuf reference? (and missing man page) Message-ID: <200305231907.h4NJ7ubu089890@manor.msen.com>
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Missing man page:
4.8 releasse - man netstat has a reference to mbuf(9) but man mbuf says:
No manual entry for mbuf
Real question:
I'm seeking some additional documentation on the relationship
between mbufs, mbuf clusters and network memory usage (essentially
the output of netstat -m).
Obviously, the number of mbuf clusters is tunable with kern.ipc.nmbclusters.
The maximum number of mbufs appears to be 4 * that number (or is that 4
a tunable?)
Not sure how network memory allocation is chosen (% of base memory
size as default?) and, does it grow dynamically or should one be
building a new kernel once, say, 80% of the mb_map is in use? Or
simply ignore occasional high mb_map utilization unless requests
for memorey are delayed/denied?
/\/\ \/\/
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