Re: slow down problem

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>>
>> Hi All,
>>
>> Fedora 32
>> Xfce 4.14
>>
>> Every so often, once every two weeks or so for no apparent
>> reason or program, my computer slows down to about 1/5 speed.
>> Typed letter take time to appear.  File system stuff is five
>> times slower: tar, dump, etc..
>>
>> And I can't find anything wrong.  iotop and top both show
>> hardly anything happening.  Here is a screenshot of atop:
>>
>> https://ibb.co/m8Gq1yQ
>>
>> I notice that when I am doing a tar or a dump, my hard drive
>> light is on solid or constantly flashing.  When the slow
>> down occurs, it will stay off for a solid five seconds,
>> the flash a little, and back off again.
>>
>> And the tar and dumps always come out okay.  They just
>> take five times longer.
>>
>> Any words of wisdom?
>>
>> Many thanks,
>> -T

On 2020-06-03 18:02, Roger Heflin wrote:
grep -i dirty /proc/meminfo

If that number gets high enough the machine will freeze all write io
(dirty_ratio/bytes) until it gets down to the
dirty_background_bytes/ratio.

If you hit this, how long that is is how long it takes to write out
(background_ratio - ratio) * ram

I have had good luck setting background_bytes to say 3000000 (3 MB)
and setting ditry_ratio to say (5MB).

With it being 2MB or a lower number than default (usually a % of ram)
the pause is so small you won't notice it, and
it some cases the pause is fast enough that other processes don't stall.

On Wed, Jun 3, 2020 at 7:31 PM ToddAndMargo via users
<users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

$ grep -i dirty /proc/meminfo
Dirty:               344 kB

But it is working fine right now
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