From: Marinko Catovic <marinko.catovic@gmail.com>
To: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
Christopher Lameter <cl@linux.com>,
linux-mm@kvack.org
Subject: Re: Caching/buffers become useless after some time
Date: Wed, 29 Aug 2018 18:44:27 +0200 [thread overview]
Message-ID: <CADF2uSoG_RdKF0pNMBaCiPWGq3jn1VrABbm-rSnqabSSStixDw@mail.gmail.com> (raw)
In-Reply-To: <20180829152716.GB10223@dhcp22.suse.cz>
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> > one host is at a healthy state right now, I'd run that over there
> immediately.
>
> Let's see what we can get from here.
>
oh well, that went fast. actually with having low values for buffers
(around 100MB) with caches
around 20G or so, the performance was nevertheless super-low, I really had
to drop
the caches right now. This is the first time I see it with caches >10G
happening, but hopefully
this also provides a clue for you.
Just after starting the stats I reset from previously defer to madvise - I
suspect that this somehow
caused the rapid reaction, since a few minutes later I saw that the free
RAM jumped from 5GB to 10GB,
after that I went afk, returning to the pc since my monitoring systems went
crazy telling me about downtime.
If you think changing /sys/kernel/mm/transparent_hugepage/defrag back to
its default, while it was
on defer now for days, was a mistake, then please tell me.
here you go: https://nofile.io/f/VqRg644AT01/vmstat.tar.gz
trace_pipe: https://nofile.io/f/wFShvZScpvn/trace_pipe.gz
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next prev parent reply other threads:[~2018-08-29 16:44 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-11 13:18 Caching/buffers become useless after some time Marinko Catovic
2018-07-12 11:34 ` Michal Hocko
2018-07-13 15:48 ` Marinko Catovic
2018-07-16 15:53 ` Marinko Catovic
2018-07-16 16:23 ` Michal Hocko
2018-07-16 16:33 ` Marinko Catovic
2018-07-16 16:45 ` Michal Hocko
2018-07-20 22:03 ` Marinko Catovic
2018-07-27 11:15 ` Vlastimil Babka
2018-07-30 14:40 ` Michal Hocko
2018-07-30 22:08 ` Marinko Catovic
2018-08-02 16:15 ` Vlastimil Babka
2018-08-03 14:13 ` Marinko Catovic
2018-08-06 9:40 ` Vlastimil Babka
2018-08-06 10:29 ` Marinko Catovic
2018-08-06 12:00 ` Michal Hocko
2018-08-06 15:37 ` Christopher Lameter
2018-08-06 18:16 ` Michal Hocko
2018-08-09 8:29 ` Marinko Catovic
2018-08-21 0:36 ` Marinko Catovic
2018-08-21 6:49 ` Michal Hocko
2018-08-21 7:19 ` Vlastimil Babka
2018-08-22 20:02 ` Marinko Catovic
2018-08-23 12:10 ` Vlastimil Babka
2018-08-23 12:21 ` Michal Hocko
2018-08-24 0:11 ` Marinko Catovic
2018-08-24 6:34 ` Vlastimil Babka
2018-08-24 8:11 ` Marinko Catovic
2018-08-24 8:36 ` Vlastimil Babka
2018-08-29 14:54 ` Marinko Catovic
2018-08-29 15:01 ` Michal Hocko
2018-08-29 15:13 ` Marinko Catovic
2018-08-29 15:27 ` Michal Hocko
2018-08-29 16:44 ` Marinko Catovic [this message]
2018-10-22 1:19 ` Marinko Catovic
2018-10-23 17:41 ` Marinko Catovic
2018-10-26 5:48 ` Marinko Catovic
2018-10-26 8:01 ` Michal Hocko
2018-10-26 23:31 ` Marinko Catovic
2018-10-27 6:42 ` Michal Hocko
[not found] ` <6e3a9434-32f2-0388-e0c7-2bd1c2ebc8b1@suse.cz>
2018-10-30 15:30 ` Michal Hocko
2018-10-30 16:08 ` Marinko Catovic
2018-10-30 17:00 ` Vlastimil Babka
2018-10-30 18:26 ` Marinko Catovic
2018-10-31 7:34 ` Michal Hocko
2018-10-31 7:32 ` Michal Hocko
2018-10-31 13:40 ` Vlastimil Babka
2018-10-31 14:53 ` Marinko Catovic
2018-10-31 17:01 ` Michal Hocko
2018-10-31 19:21 ` Marinko Catovic
2018-11-01 13:23 ` Michal Hocko
2018-11-01 22:46 ` Marinko Catovic
2018-11-02 8:05 ` Michal Hocko
2018-11-02 11:31 ` Marinko Catovic
2018-11-02 11:49 ` Michal Hocko
2018-11-02 12:22 ` Vlastimil Babka
2018-11-02 12:41 ` Marinko Catovic
2018-11-02 13:13 ` Vlastimil Babka
2018-11-02 13:50 ` Marinko Catovic
2018-11-02 14:49 ` Vlastimil Babka
2018-11-02 14:59 ` Vlastimil Babka
2018-11-30 12:01 ` Marinko Catovic
2018-12-10 21:30 ` Marinko Catovic
2018-12-10 21:47 ` Michal Hocko
2018-10-31 13:12 ` Vlastimil Babka
2018-08-24 6:24 ` Vlastimil Babka
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