[Bug 276870] mbuf cluster leak with on pf+bird2 bgp routers

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276870

--- Comment #1 from Thomas Steen Rasmussen / Tykling <thomas@gibfest.dk> ---
ps. The very rudimentary netstat -m exporter is here, needs jq and sponge
installed:

[tykling@dgncr2a ~]$ cat /etc/cron.d/netstat_mbuf_exporter
# Run netstat_mbuf_exporter.sh every minute and put the output in prometheus
textfile collector directory
* * * * * root /usr/local/bin/netstat_mbuf_exporter.sh | /usr/local/bin/sponge
/var/tmp/node_exporter/netstat-mbuf.prom

[tykling@dgncr2a ~]$ cat /usr/local/bin/netstat_mbuf_exporter.sh
#!/bin/sh
/usr/bin/netstat -m --libxo json | /usr/local/bin/jq -r '."mbuf-statistics" |
keys_unsorted[] as $k | "\($k) \(.[$k])"' | /usr/bin/tr "-" "_" | /usr/bin/sed
"s/^/freebsd_netstat_mbuf_/g"

[tykling@dgncr2a ~]$ head -5 /var/tmp/node_exporter/netstat-mbuf.prom
freebsd_netstat_mbuf_mbuf_current 1495568
freebsd_netstat_mbuf_mbuf_cache 3547
freebsd_netstat_mbuf_mbuf_total 1499115
freebsd_netstat_mbuf_cluster_current 749044
freebsd_netstat_mbuf_cluster_cache 3558
[tykling@dgncr2a ~]$

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