nginx workers stack at 100% usage after X random daysWhat sort of web server hardware do you use to handle 100 Mbps+ of static files?Requests per second slower when using nginx for load balancingWindows 2003/2008 terminal server, Application using 95-100% CPU when crashed, auto kill process?Trying to find bottleneck… 60k onsite visitorsNginx + Apache server crash every 6 daysnginx can't execute many requestsNginx and passenger request timeout (nginx status code 499)Nginx failed space when uploadHow to diagnose process at 100% CPU without being able to shell in?Fine tune Nginx & PHP FPM

I recently started my machine learning PhD and I have absolutely no idea what I'm doing

Is there an academic word that means "to split hairs over"?

Is there any good reason to write "it is easy to see"?

How to not get blinded by an attack at dawn

Capital gains on stocks sold to take initial investment off the table

How does Ctrl+c and Ctrl+v work?

​Cuban​ ​Primes

Why doesn't Iron Man's action affect this person in Endgame?

Getting a similar picture (colours) on Manual Mode while using similar Auto Mode settings (T6 and 40D)

How to rename multiple files in a directory at the same time

Why did Varys remove his rings?

Can a tourist shoot a gun in the USA?

What color to choose as "danger" if the main color of my app is red

tikz drawing rectangle discretized with triangle lattices and its centroids

Will the volt, ampere, ohm or other electrical units change on May 20th, 2019?

What is the effect of the Feeblemind spell on Ability Score Improvements?

UUID type for NEWID()

Were any toxic metals used in the International Space Station?

Why are lawsuits between the President and Congress not automatically sent to the Supreme Court

Can anyone give me examples of the relative-determinative 'which'?

labelled end points on logic diagram

How will the lack of ground stations affect navigation?

c++ conditional uni-directional iterator

Was the dragon prowess intentionally downplayed in S08E04?



nginx workers stack at 100% usage after X random days


What sort of web server hardware do you use to handle 100 Mbps+ of static files?Requests per second slower when using nginx for load balancingWindows 2003/2008 terminal server, Application using 95-100% CPU when crashed, auto kill process?Trying to find bottleneck… 60k onsite visitorsNginx + Apache server crash every 6 daysnginx can't execute many requestsNginx and passenger request timeout (nginx status code 499)Nginx failed space when uploadHow to diagnose process at 100% CPU without being able to shell in?Fine tune Nginx & PHP FPM






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;








0















I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.



It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:



user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;

pcre_jit on;

events

multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;



No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot



If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.



I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.



I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.



Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.



Helpful information:



I am using WordOps ready-made stack script.
Nginx is on version 1.14.2










share|improve this question






















  • What operating system, Linux?

    – John Mahowald
    May 4 at 22:00











  • strace. Or gdb if you're feeling adventurous.

    – womble
    May 5 at 2:06

















0















I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.



It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:



user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;

pcre_jit on;

events

multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;



No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot



If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.



I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.



I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.



Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.



Helpful information:



I am using WordOps ready-made stack script.
Nginx is on version 1.14.2










share|improve this question






















  • What operating system, Linux?

    – John Mahowald
    May 4 at 22:00











  • strace. Or gdb if you're feeling adventurous.

    – womble
    May 5 at 2:06













0












0








0








I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.



It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:



user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;

pcre_jit on;

events

multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;



No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot



If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.



I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.



I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.



Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.



Helpful information:



I am using WordOps ready-made stack script.
Nginx is on version 1.14.2










share|improve this question














I am facing a strange incident, under which my two nginx workers suddenly get stack at 100% of CPU usage after a random number of days and at the same web traffic, under which they are behaving fine during the other days.



It serves a light traffic of 5concurrent requests per second and my nginx worker's config is set as follow:



user www-data;
worker_processes auto;
worker_cpu_affinity auto;
worker_rlimit_nofile 100000;
pid /run/nginx.pid;

pcre_jit on;

events

multi_accept on;
worker_connections 2048;
accept_mutex on;
use epoll;



No matter if I change the processes to auto or to a static amount (i've tried 1), i get a 100% starting after ~6 days. Here is a screenshot of my current htop: screenshot



If i restart my nginx service, load will return to normal. After 5-6 days, it will hit 100% again.



I've tried usign tools like ngxtop, but I am not able to identify the real cause of the load, but only to verify that this is not happening from a website source.



I've also restarted php7.3-fpm and nginx's CPU usage is still 100%, which means to mean that something else is going wrong.



Im not aware of any debugging tools for such a case and I would be thankful in advance if you can guide me on the proper tools in order to debug it.



Helpful information:



I am using WordOps ready-made stack script.
Nginx is on version 1.14.2







nginx cpu-usage troubleshooting






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked May 4 at 13:28









JohnnyBratsoniJohnnyBratsoni

1




1












  • What operating system, Linux?

    – John Mahowald
    May 4 at 22:00











  • strace. Or gdb if you're feeling adventurous.

    – womble
    May 5 at 2:06

















  • What operating system, Linux?

    – John Mahowald
    May 4 at 22:00











  • strace. Or gdb if you're feeling adventurous.

    – womble
    May 5 at 2:06
















What operating system, Linux?

– John Mahowald
May 4 at 22:00





What operating system, Linux?

– John Mahowald
May 4 at 22:00













strace. Or gdb if you're feeling adventurous.

– womble
May 5 at 2:06





strace. Or gdb if you're feeling adventurous.

– womble
May 5 at 2:06










1 Answer
1






active

oldest

votes


















0














On Linux, it is easy to profile exactly what code is on CPU.



Install debug symbols of the kernel and your app (nginx) so you have human readable function names.



Run perf top to see the top symbols on CPU. perf_events reference



Generate a flame graph visualization using perf or bcc.



Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.



uptime
dmesg | tail
vmstat 1
mpstat -P ALL 1
pidstat 1
iostat -xz 1
free -m
sar -n DEV 1
sar -n TCP,ETCP 1
top


Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.






share|improve this answer























    Your Answer








    StackExchange.ready(function()
    var channelOptions =
    tags: "".split(" "),
    id: "2"
    ;
    initTagRenderer("".split(" "), "".split(" "), channelOptions);

    StackExchange.using("externalEditor", function()
    // Have to fire editor after snippets, if snippets enabled
    if (StackExchange.settings.snippets.snippetsEnabled)
    StackExchange.using("snippets", function()
    createEditor();
    );

    else
    createEditor();

    );

    function createEditor()
    StackExchange.prepareEditor(
    heartbeatType: 'answer',
    autoActivateHeartbeat: false,
    convertImagesToLinks: true,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: 10,
    bindNavPrevention: true,
    postfix: "",
    imageUploader:
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    ,
    onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    );



    );













    draft saved

    draft discarded


















    StackExchange.ready(
    function ()
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fserverfault.com%2fquestions%2f965868%2fnginx-workers-stack-at-100-usage-after-x-random-days%23new-answer', 'question_page');

    );

    Post as a guest















    Required, but never shown

























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0














    On Linux, it is easy to profile exactly what code is on CPU.



    Install debug symbols of the kernel and your app (nginx) so you have human readable function names.



    Run perf top to see the top symbols on CPU. perf_events reference



    Generate a flame graph visualization using perf or bcc.



    Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.



    uptime
    dmesg | tail
    vmstat 1
    mpstat -P ALL 1
    pidstat 1
    iostat -xz 1
    free -m
    sar -n DEV 1
    sar -n TCP,ETCP 1
    top


    Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.






    share|improve this answer



























      0














      On Linux, it is easy to profile exactly what code is on CPU.



      Install debug symbols of the kernel and your app (nginx) so you have human readable function names.



      Run perf top to see the top symbols on CPU. perf_events reference



      Generate a flame graph visualization using perf or bcc.



      Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.



      uptime
      dmesg | tail
      vmstat 1
      mpstat -P ALL 1
      pidstat 1
      iostat -xz 1
      free -m
      sar -n DEV 1
      sar -n TCP,ETCP 1
      top


      Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.






      share|improve this answer

























        0












        0








        0







        On Linux, it is easy to profile exactly what code is on CPU.



        Install debug symbols of the kernel and your app (nginx) so you have human readable function names.



        Run perf top to see the top symbols on CPU. perf_events reference



        Generate a flame graph visualization using perf or bcc.



        Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.



        uptime
        dmesg | tail
        vmstat 1
        mpstat -P ALL 1
        pidstat 1
        iostat -xz 1
        free -m
        sar -n DEV 1
        sar -n TCP,ETCP 1
        top


        Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.






        share|improve this answer













        On Linux, it is easy to profile exactly what code is on CPU.



        Install debug symbols of the kernel and your app (nginx) so you have human readable function names.



        Run perf top to see the top symbols on CPU. perf_events reference



        Generate a flame graph visualization using perf or bcc.



        Review basic utilization with a handful of useful tools. Or look at netdata for the same thing.



        uptime
        dmesg | tail
        vmstat 1
        mpstat -P ALL 1
        pidstat 1
        iostat -xz 1
        free -m
        sar -n DEV 1
        sar -n TCP,ETCP 1
        top


        Then the difficult part: determine what causes it. Could be app code (PHP?) could be web server (nginx) could be OS tuning (Linux). Get familiar with the entire stack and what it is doing.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered May 5 at 11:46









        John MahowaldJohn Mahowald

        9,9841714




        9,9841714



























            draft saved

            draft discarded
















































            Thanks for contributing an answer to Server Fault!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid


            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.

            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fserverfault.com%2fquestions%2f965868%2fnginx-workers-stack-at-100-usage-after-x-random-days%23new-answer', 'question_page');

            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            Wikipedia:Vital articles Мазмуну Biography - Өмүр баян Philosophy and psychology - Философия жана психология Religion - Дин Social sciences - Коомдук илимдер Language and literature - Тил жана адабият Science - Илим Technology - Технология Arts and recreation - Искусство жана эс алуу History and geography - Тарых жана география Навигация менюсу

            Club Baloncesto Breogán Índice Historia | Pavillón | Nome | O Breogán na cultura popular | Xogadores | Adestradores | Presidentes | Palmarés | Historial | Líderes | Notas | Véxase tamén | Menú de navegacióncbbreogan.galCadroGuía oficial da ACB 2009-10, páxina 201Guía oficial ACB 1992, páxina 183. Editorial DB.É de 6.500 espectadores sentados axeitándose á última normativa"Estudiantes Junior, entre as mellores canteiras"o orixinalHemeroteca El Mundo Deportivo, 16 setembro de 1970, páxina 12Historia do BreogánAlfredo Pérez, o último canoneiroHistoria C.B. BreogánHemeroteca de El Mundo DeportivoJimmy Wright, norteamericano do Breogán deixará Lugo por ameazas de morteResultados de Breogán en 1986-87Resultados de Breogán en 1990-91Ficha de Velimir Perasović en acb.comResultados de Breogán en 1994-95Breogán arrasa al Barça. "El Mundo Deportivo", 27 de setembro de 1999, páxina 58CB Breogán - FC BarcelonaA FEB invita a participar nunha nova Liga EuropeaCharlie Bell na prensa estatalMáximos anotadores 2005Tempada 2005-06 : Tódolos Xogadores da Xornada""Non quero pensar nunha man negra, mais pregúntome que está a pasar""o orixinalRaúl López, orgulloso dos xogadores, presume da boa saúde económica do BreogánJulio González confirma que cesa como presidente del BreogánHomenaxe a Lisardo GómezA tempada do rexurdimento celesteEntrevista a Lisardo GómezEl COB dinamita el Pazo para forzar el quinto (69-73)Cafés Candelas, patrocinador del CB Breogán"Suso Lázare, novo presidente do Breogán"o orixinalCafés Candelas Breogán firma el mayor triunfo de la historiaEl Breogán realizará 17 homenajes por su cincuenta aniversario"O Breogán honra ao seu fundador e primeiro presidente"o orixinalMiguel Giao recibiu a homenaxe do PazoHomenaxe aos primeiros gladiadores celestesO home que nos amosa como ver o Breo co corazónTita Franco será homenaxeada polos #50anosdeBreoJulio Vila recibirá unha homenaxe in memoriam polos #50anosdeBreo"O Breogán homenaxeará aos seus aboados máis veteráns"Pechada ovación a «Capi» Sanmartín e Ricardo «Corazón de González»Homenaxe por décadas de informaciónPaco García volve ao Pazo con motivo do 50 aniversario"Resultados y clasificaciones""O Cafés Candelas Breogán, campión da Copa Princesa""O Cafés Candelas Breogán, equipo ACB"C.B. Breogán"Proxecto social"o orixinal"Centros asociados"o orixinalFicha en imdb.comMario Camus trata la recuperación del amor en 'La vieja música', su última película"Páxina web oficial""Club Baloncesto Breogán""C. B. Breogán S.A.D."eehttp://www.fegaba.com

            What should I write in an apology letter, since I have decided not to join a company after accepting an offer letterShould I keep looking after accepting a job offer?What should I do when I've been verbally told I would get an offer letter, but still haven't gotten one after 4 weeks?Do I accept an offer from a company that I am not likely to join?New job hasn't confirmed starting date and I want to give current employer as much notice as possibleHow should I address my manager in my resignation letter?HR delayed background verification, now jobless as resignedNo email communication after accepting a formal written offer. How should I phrase the call?What should I do if after receiving a verbal offer letter I am informed that my written job offer is put on hold due to some internal issues?Should I inform the current employer that I am about to resign within 1-2 weeks since I have signed the offer letter and waiting for visa?What company will do, if I send their offer letter to another company