AIX 5L Problem Determination - IBM Redbooks

The netstat -m command
The netstat -m command displays the statistics recorded by the mbuf
memory-management routines. The most useful statistics in the output of the
netstat -m command are the counters that show the requests for mbufs denied
and non-zero values in the failed column. If the requests for mbufs denied is not
displayed, then this must be an SMP system running AIX Version 4.3.2 or later;
for performance reasons, global statistics are turned off by default. To enable the
global statistics, set the no parameter extended_netstats to 1. This can be done
by changing the /etc/rc.net file and rebooting the system.
The following example shows the first part of the netstat -m output with
extended_netstats set to 1:
# netstat -m
426 mbufs in use:
384 mbuf cluster pages in use
1642 Kbytes allocated to mbufs
0 requests for mbufs denied
0 calls to protocol drain routines
0 sockets not created because sockthresh was reached
Kernel malloc statistics:
******* CPU 0 *******
By size inuse calls failed delayed free hiwat freed
32 92 187 0 0 36 1440 0
64 33 57 0 0 31 720 0
128 21 227 0 0 11 360 0
256 13 1602 0 0 19 864 0
512 30 125 0 0 2 90 0
1024 12 129 0 0 4 225 0
2048 1 3 0 0 1 225 0
4096 1 7 0 0 3 270 0
8192 2 43 0 0 1 22 0
16384 0 0 0 0 40 54 0
65536 1 1 0 0 0 2047 0
******* CPU 1 *******
By size inuse calls failed delayed free hiwat freed
32 87 313 0 0 41 1440 0
64 17 191 0 0 47 720 0
128 17 311 0 0 15 360 0
256 60 2497 0 0 20 864 0
512 62 406 0 0 10 90 0
1024 24 139 0 0 4 225 0
2048 1 3 0 0 1 225 0
268 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques