From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 86471] drastic reduction of write performance after the
termination of mysqld
Date: Thu, 23 Oct 2014 10:34:39 +0000
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--- Comment #5 from Markus K=C3=B6nigshaus ---
Hello Theodore,
I really wait a long time and I have the kernel dropped all Caches with
/proc/sys/vm/drop_caches, so I do not thing, there are left buffered wr=
ites
from mysqld. I can reproduce that behavior, before mysql shutdown I get=
14
MB/s, after I get 400 kB/s with dd.=20
I will try to compile blktrace for our system later, not enough time fo=
r that
now. Can blktrace show me how often the writeback - mechanism writes th=
e cache
back to e.mmc - card?
Markus
--=20
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