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Server problems today

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Mr. Bill:
We're having issues this morning with the server for thesurvivalpodcast.com and survivalpodcast.net suddenly slowing to a crawl for 5 to 30 minutes at a time.  Problem not identified yet -- just wanted to let you know we're working on it.

Stwood:
Maybe the BS from the last coupla days is oozing around in the server yet.  ???

Smurf Hunter:
Assuming you haven't changed anything, one of the biggest clues on a linux machine is file handles.

https://en.wikipedia.org/wiki/Lsof

If you have the parent process ID of your HTTP server, you can get a listing of all the open files associated.  Remember in unix a network socket is also a file.
Often the count of open files can grow over time.  You can get a count doing something like this:


--- Code: ---lsof 2> /dev/null | awk {'print $2'} 2> /dev/null | grep $PID | wc -l
--- End code ---

Compare the results immediately after a restart of your HTTP to several days later.

Hope the unsolicited advice is not taken badly.

Mr. Bill:
Thanks for the suggestion -- I'll look at that (but I think Archer did already).  At the moment we can't find anything wrong on the server, so we're suspecting it's an issue with either the hardware or something that the server provider needs to fix.  Awaiting more data.

surfivor:

What is running, how much disk:


$ top

top - 15:57:06 up  4:58,  1 user,  load average: 0.54, 0.46, 0.25
Tasks: 254 total,   3 running, 251 sleeping,   0 stopped,   0 zombie
%Cpu(s):  2.4 us,  0.0 sy,  0.0 ni, 97.6 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  4025404 total,   299848 free,  3247088 used,   478468 buff/cache
KiB Swap:  1287164 total,   952336 free,   334828 used.   335708 avail Mem

   PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND     
  4223 lbob   20   0  503136  28580  13680 S  2.2  0.7   0:07.00 gnome-term+
     1 root      20   0  119888   4056   2944 S  0.0  0.1   0:02.32 systemd     
     2 root      20   0       0      0      0 S  0.0  0.0   0:00.01 kthreadd   
     4 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/0:+
     6 root      20   0       0      0      0 S  0.0  0.0   0:01.16 ksoftirqd/0
     7 root      20   0       0      0      0 S  0.0  0.0   0:13.05 rcu_sched   
     8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh     
     9 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0
    10 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 lru-add-dr+
    11 root      rt   0       0      0      0 S  0.0  0.0   0:00.04 watchdog/0 
    12 root      20   0       0      0      0 S  0.0  0.0   0:00.00 cpuhp/0     
    13 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kdevtmpfs   
    14 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 netns       
    15 root      20   0       0      0      0 S  0.0  0.0   0:00.02 khungtaskd 
    16 root      20   0       0      0      0 S  0.0  0.0   0:00.00 oom_reaper 
    17 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 writeback   
    18 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kcompactd0

============

$ df

df: /mnt/hgfs: Protocol error
Filesystem     1K-blocks     Used Available Use% Mounted on
udev             1989176        0   1989176   0% /dev
tmpfs             402544    11408    391136   3% /run
/dev/sda1       45044148 16888592  25844388  40% /
tmpfs            2012700     8104   2004596   1% /dev/shm
tmpfs               5120        4      5116   1% /run/lock
tmpfs            2012700        0   2012700   0% /sys/fs/cgroup
cgmfs                100        0       100   0% /run/cgmanager/fs
tmpfs             402544       32    402512   1% /run/user/1000
/dev/sr0         1855008  1855008         0 100% /media/lbob/Linux Mint 18.3 Cinnamon 64-bit

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