Re: Recurring disk activity

[Mayuresh <mayuresh@acm.org>]

On Tue, Jun 23, 2015 at 01:27:10PM -0600, Bob Proulx wrote:
>   # hdparm -B255 /dev/sda

I had disabled this when I wrote the OP, but had not set it in
/etc/hdparm.conf. Today I did that and the Load_Cycle_Count seems steadied
at 3781, though it is still under observation.

When I wrote the OP I got an impression that -B255 isn't helping, because
I wasn't aware of Load_Cycle_Count and I measured the disk activity by the
following command:

iotop -obqqqq --delay .1

This still continues to show kworker doing some activity:

  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.87 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.73 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.70 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.72 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.72 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.69 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.84 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.86 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.86 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.89 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.92 % [kworker/1:2]
  103 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.84 % [kworker/1:2]

What to attribute this disk activity to? I have tried checking using lsof
whether any files are changing that fast (such as syslog) but that is not
the case.

Mayuresh