On 06Oct2019 15:24, ToddAndMargo <ToddAndMargo@xxxxxxxx> wrote:
On 10/6/19 3:59 AM, George N. White III wrote:
On Sun, 6 Oct 2019 at 05:49, Cătălin George Feștilă
<mythcat@xxxxxxxxxxxxxxxxx <mailto:mythcat@xxxxxxxxxxxxxxxxx>>
wrote:
The RAM memory
[mythcat@desk ~]$ free -mh
total used free shared
buff/cache available
Mem: 1.6Gi 1.1Gi 277Mi 140Mi 280Mi 242Mi
Usual caveat: ordinary file activity will fill your available RAM with
cached data pages. These are normally "clean" (unmodified) and can be
freed instantly on need.
Swap: 3.5Gi 962Mi 2.5Gi
OTOH you've got 1GB of swap used. That is "idle" process memory not in
RAM; if that is needed back by things you interact with then there will
be slowness retrieving it.
This is a screenshot with htop command running firefox:
https://pasteboard.co/IAGQJ3o.png
Hoo, look at those firefox VIRT sizes. Som of that will be common, but
that's a lot of memory use IMO.
See if the slowdown correlate with firefox size. See if a firefox
restart gives you a long period before the next slowdown.
Looks like the system has 2G RAM, which is marginal these days.
Swapping to a mechical
disk would be really slow if the disk is failing.
Aye. Even without failure.
A good test of this is to check you hard drive LED light
on the front of your computer. If it is on solid or
flashing like crazy when the slow down occurs, you
are probably out of memory and swapping.
The vmstat and iostat commands are great for this. Kick them off with a
1 second report interval. The first data line has the initial totals,
the subsequence lines are the changes. So swapping and other paging
_should_ be near zero in the second and following lines. See if these
numbers are obviously high during the slowdowns.
Cheers,
Cameron Simpson <cs@xxxxxxxxxx>
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