Date: Mon, 11 Oct 2004 16:06:47 -0400 From: Mikhail Teterin <Mikhail.Teterin@murex.com> To: freebsd-current@FreeBSD.org, bde@zeta.org.au, dillon@apollo.backplane.com Subject: hangs in nbufkv Message-ID: <416AE7D7.3030502@murex.com>
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Hello!
While investigating the server's hanging, I noticed some processes in
the `nbufkv' state (even a graceful reboot becomes impossible: "some
processes would not die..."). Quick search brought up links like:
http://lists.freebsd.org/pipermail/freebsd-current/2003-June/004702.html
http://docs.freebsd.org/cgi/getmsg.cgi?fetch=56559+0+archive/1999/freebsd-current/19991031.freebsd-current
http://docs.freebsd.org/cgi/getmsg.cgi?fetch=406042+0+archive/1999/freebsd-current/19991031.freebsd-current
One of our file systems here does, indeed, use large block size (64K, I
think, not sure, how to verify it) -- it is used for storing large
database dumps. Are the bugs, Bruce and Matt are talking about, supposed
to be gone by now (in which case, I can provide more debugging info), or
does this remain a "known problem" and I should simply adopt the
workaround suggested by Bruce in the first link above -- increase
BKVASIZE? Should I also merge the patch posted by Bruce in the last of
the links above, or are there good reasons, it is not in the official tree?
In the former case, what would anyone need to know to help fix this
problem(s)?
In the latter -- what is a good BKVASIZE value for an amd64 opteron with
2Gb of memory, intended, primarily, to keep database archives online and
handy?
Thanks!
-mi
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