CentOS - Aug 2019 - browsers slowing Centos 7 installation to a crawl

On Sun, 4 Aug 2019, Jonathan Billings wrote:
> Are you sure you don?t have other processes or users running on the system?
It only happens when you have a network connection?  It might also be swapping
heavily, check to see how much RAM you have.  Check the output of ?free?.
Pretty sure.  I rebooted this morning.

top - 17:32:20 up 15:47,  6 users,  load average: 1.12, 2.55, 1.56
Tasks: 238 total,   3 running, 235 sleeping,   0 stopped,   0 zombie
%Cpu(s): 21.5 us,  3.5 sy,  0.0 ni, 74.1 id,  0.8 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  2020144 total,    80436 free,  1416824 used,   522884 buff/cache
KiB Swap:  4883724 total,  3887864 free,   995860 used.   149092 avail Mem

   PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND 
27121 hennebry  20   0 1636444 218240  49920 R  29.2 10.8   1:31.01 chromium-b+ 
27132 hennebry  20   0 1673932 213652  55576 S   7.3 10.6   1:01.19 chromium-b+ 
26614 hennebry  20   0 1871712 104840  41084 S   3.7  5.2   0:26.78 chromium-b+ 
27186 hennebry  20   0 1495336 109988  47176 S   3.3  5.4   0:16.55 chromium-b+ 
27423 hennebry  20   0 1431484  87076  45928 S   2.3  4.3   0:08.33 chromium-b+ 
26647 hennebry  20   0 2685156 188444  27308 S   1.0  9.3   2:19.84 chromium-b+
  5962 hennebry  20   0 3617336 111096  19404 S   0.7  5.5   2:25.24 gnome-shell
27174 hennebry  20   0 1481508 114332  48276 S   0.7  5.7   0:07.88 chromium-b+ 
27257 hennebry  20   0 1439148  96572  52020 S   0.7  4.8   0:05.98 chromium-b+
  3483 root      20   0  374444  20432  13732 S   0.3  1.0   0:42.88 X 
23824 hennebry  20   0  753956  18272   6488 S   0.3  0.9   0:13.63 gnome-term+
     1 root      20   0  128404   4376   2484 S   0.0  0.2   0:07.65 systemd

Usually when I'm having trouble, there are at least two D's.
Of course, 'tain't as crawly as it often gets.

Mem:        2020144     1454904       76140      204764      489100      135004
Swap:       4883724      978480     3905244

> Look at the syslogs/journal when you?re logged in (in a terminal, run ?sudo
journalctl -xfl?).  You will see a lot of stuff printed, but it might give you
an idea of what?s going on.
I think this qualifies as interesting.  I have rather a lot of it:
Aug 04 17:28:20 localhost.localdomain chromium-browser.desktop[26614]:
[26647:26728:0804/172820.614816:ERROR:latency_info.cc(149)]
Surface::TakeLatencyInfoFromFrame, LatencyInfo vector size 102 is too big.

I found it with google, but all the entries froze chromium.

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
                                                              --  someeecards

On 5/08/19 10:42 AM, Michael Hennebry wrote:
> Mem:??????? 2020144???? 1454904?????? 76140????? 204764????? 489100      
> 135004
> Swap:?????? 4883724????? 978480???? 3905244
free -h is generally more readable, but...

It's RAM.  You basically have a total of 2G ram on the system, you have 
less than 500M available and are into swap by nearly 1G, so you're 
swapping heavily.  2G is enough for a minimal install but browsers such 
as firefox and chrome can easily use a lot of memory fast and trying to 
run one on a 2G system while doing an install at the same time will get 
you swapping and slow the system to a crawl.


Peter

> On Aug 5, 2019, at 4:12 AM, Peter <peter at pajamian.dhs.org> wrote:
> 
> On 5/08/19 10:42 AM, Michael Hennebry wrote:
>> Mem:        2020144     1454904       76140      204764      489100    
135004
>> Swap:       4883724      978480     3905244
> 
> free -h is generally more readable, but...
> 
> It's RAM.  You basically have a total of 2G ram on the system, you have
less than 500M available and are into swap by nearly 1G, so you're swapping
heavily.  2G is enough for a minimal install but browsers such as firefox and
chrome can easily use a lot of memory fast and trying to run one on a 2G system
while doing an install at the same time will get you swapping and slow the
system to a crawl.
Agreed, 2G of RAM for graphical logins and web browsers is not nearly enough.  I
was using 4G on a system running C7 and it was unusable, I can?t imagine 2G.

--
Jonathan Billings <billings at negate.org>

On Mon, 5 Aug 2019, Peter wrote:
> On 5/08/19 10:42 AM, Michael Hennebry wrote:
>> Mem:??????? 2020144???? 1454904?????? 76140????? 204764????? 489100 
>> 135004
>> Swap:?????? 4883724????? 978480???? 3905244
>
> free -h is generally more readable, but...
>
> It's RAM.  You basically have a total of 2G ram on the system, you have
> less than 500M available and are into swap by nearly 1G, so you're 
> swapping heavily.  2G is enough for a minimal install but browsers such 
> as firefox and chrome can easily use a lot of memory fast and trying to 
> run one on a 2G system while doing an install at the same time will get 
> you swapping and slow the system to a crawl.
To be clear, by "Centos 7 installation",
I meant a PC on which Centos 7 was installed.

In any case, Centos 7 has not always been this slow.
Presumably something has changed.
I've been living with this for several months,
but not forever.
I can run compilers and stuff without an internet connection,
so I could get some work done.

To get that output, I had free running in a loop and waited for
the freeze before copy and pasting.

I wasn't surprised by the result.
Occasionally top shows kswap0 (I think) in a D state.

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
                                                              --  someeecards