Date: Wed, 16 Oct 1996 13:11:06 +0800 (CST) From: Jian-Da Li <jdli@FreeBSD.csie.NCTU.edu.tw> To: freebsd-current@freebsd.org Subject: mbuf full problem Message-ID: <199610160511.NAA19045@FreeBSD.csie.NCTU.edu.tw>
next in thread | raw e-mail | index | archive | help
Hi :
Our FreeBSD server is running 2.2-961006-SNAP with the latest current
kernel, and there is a serious problem about mbuf useage (since long
ago).
I found that whenever the mbuf clusters useage reached (or over) the
limit defined by NMBCLUSTERS, it seems will never decrease.
The mbuf full problem is usually caused by too many mirror processes
running, or the search engine updating it's gathered database.
The mbuf useage is normally around 800 on this server, but when
too-many-mirrors are running or search engine is gathering, it will
increase to 1200 (current kernel limit) even to 1800 (old kernel
limit). And it will cause network almost down except ping. I tried
to kill those processes, but the mbuf useage just keep staying around
1200 (was 1800) no matter how many network-related processess I
killed.
I have to reboot the machine to solve this problem.
Now I increase NMBCLUSTERS back to 1800 to make the bad thing happen
slower, but I don't think it's the right way to go.
Is it a mbuf-leaking ? Which information else can I provide ?
Any idea ?
====== netstat -m, maxuser=48, DRAM=32MB ======
1430 mbufs in use:
1366 mbufs allocated to data
29 mbufs allocated to packet headers
23 mbufs allocated to protocol control blocks
12 mbufs allocated to socket names and addresses
1280/1280 mbuf clusters in use
2738 Kbytes allocated to network (100% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
===============================================
Thanks for your help.
--
李 建 達 (Jian-Da Li) 交 大 資 工
E-Mail : <jdli@csie.nctu.edu.tw>
http://www.csie.nctu.edu.tw/~jdli
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199610160511.NAA19045>