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Edilson Carlos Souza
Edilson Carlos Souza
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Bug

errors with swap and low memory

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Hello everyone, everything good!?
You are giving these errors on my server, does anyone have any idea what it might be?
At times the server takes a long time to respond.
Thanks in advance!
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Monday, February 08 2021, 12:44 PM
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Accepted Answer

Nick Howitt
Nick Howitt
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Monday, February 08 2021, 06:51 PM - #Permalink
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I can't see it becoming less stable at all unless you get non-compatible or faulty memory. More "proper" memory probably will be consumed as you are using a lot of swap at the moment. Increasing your main memory may allow your swap consumption to reduce, but it is a complicated topic. I would try to add at least 8GB, so doubling your memory.
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 08:10 PM - #Permalink
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    thank you Nick
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 05:19 PM - #Permalink
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    Do you think that if you add more memory it will cause the system to become unstable, or it may become more consuming?
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Monday, February 08 2021, 05:10 PM - #Permalink
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    Your system needs more memory as you documentation system is eating it all. Either that or you have to find a way of tuning it to use less memory.
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 05:07 PM - #Permalink
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    I'm sorry Nick, now that I understand the tag issue. thank you!
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 05:05 PM - #Permalink
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    top - 14:04:08 up 18:37,  2 users,  load average: 9,70, 5,97, 5,20
    
Tasks: 234 total,   2 running, 232 sleeping,   0 stopped,   0 zombie
    
%Cpu(s): 40,7 us,  3,2 sy,  0,7 ni,  8,1 id, 47,1 wa,  0,0 hi,  0,1 si,  0,0 st
    
KiB Mem :  8039624 total,   134044 free,  7624436 used,   281144 buff/cache
    
KiB Swap:  8126460 total,  6094440 free,  2032020 used.   124212 avail Mem
    

    
  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    
24308 ds        20   0 5721792   4,4g   4148 R 147,5 57,9   3:58.44 docservice
    
11319 ds        20   0 3933912   2,2g   1604 D   0,3 28,2   4:57.88 converter
    
 1826 root      39  19 2401568 135788    988 S   3,0  1,7 113:23.49 mono-sgen
    
 3107 root      20   0 2435232  61876   2240 S   2,0  0,8   9:19.85 mysqld
    
 1018 rabbitmq  20   0 2236132  41660    952 S   0,7  0,5 220:05.15 beam.smp
    
14055 root      20   0  414612  32328  19852 S   3,0  0,4   1:02.12 php-fpm
    
14067 root      20   0  411716  30000  20568 S   4,0  0,4   1:03.70 php-fpm
    
14070 root      20   0  411764  29860  20332 S   4,7  0,4   1:03.75 php-fpm
    
14068 root      20   0  409896  28472  20988 S   2,0  0,4   1:04.90 php-fpm
    
 1234 root      20   0  278260  24648   2848 S   0,0  0,3   7:54.50 netifyd
    
 1346 webconf+  20   0  593964  10428    328 S   0,0  0,1   0:01.15 webconfig
    
18018 webconf+  20   0  594496  10184    180 S   0,0  0,1   0:01.20 webconfig
    
 1349 webconf+  20   0  582960   9868    212 S   0,0  0,1   0:00.98 webconfig
    
26144 clearco+  20   0  310956   9260   6076 D   0,7  0,1   0:00.02 network
    
18022 webconf+  20   0  595104   8576    180 S   0,0  0,1   0:00.94 webconfig
    
 1348 webconf+  20   0  581844   8380    332 S   0,0  0,1   0:00.71 webconfig
    
18023 webconf+  20   0  582548   7048    180 S   0,0  0,1   0:00.60 webconfig
    
  834 root      20   0 1081168   6676      0 S   0,7  0,1   0:30.28 snapd
    
 1043 wsdd      20   0  220772   4360   1060 S   0,0  0,1   0:06.20 python3
    
 2095 root      20   0 1229864   4332      0 S   0,0  0,1   2:25.63 mdns-publisher
    
26146 root      20   0  815848   4240   2728 S   0,0  0,1   0:00.00 snapctl
    
  520 root      20   0   40244   3140   3000 S   0,0  0,0   0:02.12 systemd-journal
    
11152 root      20   0  219920   2848    476 S   0,0  0,0   7:43.54 supervisord
    
11244 ds        20   0  909220   2472    272 S   0,0  0,0   0:01.08 spellchecker
    
 1433 ldap      20   0 1691328   2376      0 S   0,0  0,0   0:03.10 slapd
    
26519 webconf+  20   0  583064   2216    340 S   0,0  0,0   0:00.25 webconfig
    
 2178 root      20   0   56908   2008    616 S   1,0  0,0   2:35.51 redis-server
    
 1248 root      20   0  143880   1956    276 S   0,0  0,0   0:01.49 syswatch
    
 1037 clearsy+  20   0  534428   1924    244 S   0,3  0,0   1:52.69 clearsyncd
    
11174 ds        20   0  593060   1824    196 S   0,0  0,0   0:00.30 statsd ./config
    
    1 root      20   0   51900   1604    768 S   0,0  0,0   0:22.49 systemd
    
11175 ds        20   0  570112   1500    276 S   0,0  0,0   0:00.48 spellchecker
    
 2556 clearco+  20   0  272820   1352    824 S   0,0  0,0   1:06.36 tconsole
    
24707 root      20   0  160228   1224    424 R   0,0  0,0   0:00.59 top
    
 1042 root      20   0  218488   1116    772 S   0,0  0,0   0:03.35 rsyslogd
    
18145 postfix   20   0   88320   1088    104 S   0,0  0,0   0:00.00 pickup
    
11178 ds        20   0  636440    996      0 S   0,0  0,0   0:24.13 converter
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Monday, February 08 2021, 04:44 PM - #Permalink
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    "M" not "m", and code tags, please (like how I've edited your post).
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 04:30 PM - #Permalink
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    that way it is classifying with M
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 04:29 PM - #Permalink
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    top - 13:28:42 up 18:01,  2 users,  load average: 5,23, 5,66, 5,88
    
Tasks: 228 total,   3 running, 225 sleeping,   0 stopped,   0 zombie
    
%Cpu(s): 38,9 us, 12,1 sy, 12,8 ni, 17,9 id, 17,8 wa,  0,0 hi,  0,4 si,  0,0 st
    
KiB Mem : 46,9/8039624  [                                                                                                    ]
    
KiB Swap: 29,4/8126460  [                                                                                                    ]
    

    
  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    
 7736 ds        20   0  951132 321808  13456 R  97,0  4,0   0:39.35 docservice
    
 1826 root      39  19 2475520 276660   1556 S  82,3  3,4 108:15.46 mono-sgen
    
11152 root      20   0  219920   3452    972 R  38,0  0,0   4:39.76 supervisord
    
 1018 rabbitmq  20   0 2316884  57432    912 S  28,0  0,7 213:30.83 beam.smp
    
11319 ds        20   0 3830584   2,1g   4220 D   2,0 27,7   4:28.95 converter
    
 1234 root      20   0  278260  22256   2856 S   1,3  0,3   7:38.33 netifyd
    
14011 root      20   0  413640  30744  19288 S   1,3  0,4   0:31.23 php-fpm
    
14054 root      20   0  414604  31856  20028 S   1,3  0,4   0:30.47 php-fpm
    
14070 root      20   0  413812  31496  19976 S   1,3  0,4   0:30.74 php-fpm
    
 2541 root      20   0  409616  27632  20212 S   1,0  0,3   0:56.16 php-fpm
    
 3107 root      20   0 2435232  64068   2548 S   1,0  0,8   8:39.28 mysqld
    
14067 root      20   0  413764  31552  20076 S   1,0  0,4   0:32.72 php-fpm
    
 2037 rabbitmq  20   0   35164     68     44 S   0,7  0,0   2:22.80 inet_gethost
    
    9 root      20   0       0      0      0 S   0,3  0,0   2:25.26 rcu_sched
    
 2038 rabbitmq  20   0   35376    152    100 S   0,3  0,0   1:15.73 inet_gethost
    
 2178 root      20   0   56908   2068    700 S   0,3  0,0   2:24.01 redis-server
    
 2556 clearco+  20   0  272816   1436    908 S   0,3  0,0   1:04.25 tconsole
    
29746 root      20   0  160360   1288    480 R   0,3  0,0   0:02.48 top
    
    1 root      20   0   51900   1740    884 S   0,0  0,0   0:21.80 systemd
    
    2 root      20   0       0      0      0 S   0,0  0,0   0:00.35 kthreadd
    
    4 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/0:0H
    
    6 root      20   0       0      0      0 S   0,0  0,0   0:30.28 ksoftirqd/0
    
    7 root      rt   0       0      0      0 S   0,0  0,0   0:00.17 migration/0
    
    8 root      20   0       0      0      0 S   0,0  0,0   0:00.00 rcu_bh
    
   10 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 lru-add-drain
    
   11 root      rt   0       0      0      0 S   0,0  0,0   0:00.18 watchdog/0
    
   12 root      rt   0       0      0      0 S   0,0  0,0   0:00.18 watchdog/1
    
   13 root      rt   0       0      0      0 S   0,0  0,0   0:00.17 migration/1
    
   14 root      20   0       0      0      0 S   0,0  0,0   0:30.20 ksoftirqd/1
    
   16 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/1:0H
    
   17 root      rt   0       0      0      0 S   0,0  0,0   0:00.17 watchdog/2
    
   18 root      rt   0       0      0      0 S   0,0  0,0   0:00.17 migration/2
    
   19 root      20   0       0      0      0 S   0,0  0,0   0:29.42 ksoftirqd/2
    
   21 root       0 -20       0      0      0 S   0,0  0,0   0:00.00 kworker/2:0H
    
   22 root      rt   0       0      0      0 S   0,0  0,0   0:00.16 watchdog/3
    
   23 root      rt   0       0      0      0 S   0,0  0,0   0:00.18 migration/3
    
   24 root      20   0       0      0      0 S   0,0  0,0   0:31.10 ksoftirqd/3
    
[root@server /]#
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Monday, February 08 2021, 04:25 PM - #Permalink
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    Sort it my Memory Usage by hitting "M". Also, rather than pasting images, please paste text in the way I indicated before. If you use PuTTy you can copy text just by selecting it.
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 04:13 PM - #Permalink
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    I have some services stealing a lot of memory and CPU, DocService is one of them.
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Monday, February 08 2021, 02:49 PM - #Permalink
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    So you have about 1.5GB free. This should be OK unless a whole lot of Swap memory is being user and it seems to be. What do you have that is taking so much memory? I can see you have "converter" consuming a big chunk, whatever that is. Your usage is much higher than mine. You can sort "top" by memory usage. I think it is the "M" key.

    Please can you put console output between code tags (the piece of paper icon with a <> on it).
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 01:33 PM - #Permalink
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    this is from the top command
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  • Accepted Answer

    Edilson Carlos Souza
    Edilson Carlos Souza
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    Monday, February 08 2021, 01:26 PM - #Permalink
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    [root@server /]# free -m
    total used free shared buff/cache available
    Mem: 7851 6008 728 23 1113 1528
    Swap: 7935 5652 2283



    That's the way out Nick
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  • Accepted Answer

    Nick Howitt
    Nick Howitt
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    Monday, February 08 2021, 01:01 PM - #Permalink
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    It means you have not got enough memory so the server is having to terminate apps. Not good. What is the output of "top" or "free"?
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