php fpm, opcache and huge pages












0















I'm using php-fpm configured to use file cache like this (php.ini):



opcache.enable=1
opcache.file_cache=/var/lib/hugetlbfs/group/www-data/pagesize-2MB
opcache.huge_code_pages=1


and by using debug.php:



<H1>This is normal HTML</H1>
But the <U>following table</U> is generated by PHP:
<?php
phpinfo();
?>


I can see that Zend OPcache is up and running, the opcache is enabled and using my configuration; also opcache-gui is showing the memory being used. When I'm checking /var/lib/hugetlbfs/group/www-data/pagesize-2MB I discover that contains no file (sudo find /var/lib/hugetlbfs/group/www-data/pagesize-2MB -type f) and has 0 size (sudo du -sh /var/lib/hugetlbfs/group/www-data/pagesize-2MB); this also happens even while my php website is continuously stressed with requests. I do find though many directories (e.g. /var/lib/hugetlbfs/group/www-data/pagesize-2MB/0c5f279af5b0301d11f2fde4c3271f7d/.../php-pages/wordpress/wp-content) while also the huge code memory seems to be used:



grep Huge /proc/meminfo
AnonHugePages: 14336 kB
ShmemHugePages: 0 kB
HugePages_Total: 33
HugePages_Free: 18
HugePages_Rsvd: 18
HugePages_Surp: 1
Hugepagesize: 2048 kB


Q: shouldn't that pagesize-2MB directory contain some cached files? If not then why not? If yes then how should I fix this missing cached files?





PS: my configuration is below




  • Ubuntu 16.04.5 LTS

  • PHP 7.0.32-0ubuntu0.16.04.1

  • using /usr/sbin/php-fpm7.0










share|improve this question





























    0















    I'm using php-fpm configured to use file cache like this (php.ini):



    opcache.enable=1
    opcache.file_cache=/var/lib/hugetlbfs/group/www-data/pagesize-2MB
    opcache.huge_code_pages=1


    and by using debug.php:



    <H1>This is normal HTML</H1>
    But the <U>following table</U> is generated by PHP:
    <?php
    phpinfo();
    ?>


    I can see that Zend OPcache is up and running, the opcache is enabled and using my configuration; also opcache-gui is showing the memory being used. When I'm checking /var/lib/hugetlbfs/group/www-data/pagesize-2MB I discover that contains no file (sudo find /var/lib/hugetlbfs/group/www-data/pagesize-2MB -type f) and has 0 size (sudo du -sh /var/lib/hugetlbfs/group/www-data/pagesize-2MB); this also happens even while my php website is continuously stressed with requests. I do find though many directories (e.g. /var/lib/hugetlbfs/group/www-data/pagesize-2MB/0c5f279af5b0301d11f2fde4c3271f7d/.../php-pages/wordpress/wp-content) while also the huge code memory seems to be used:



    grep Huge /proc/meminfo
    AnonHugePages: 14336 kB
    ShmemHugePages: 0 kB
    HugePages_Total: 33
    HugePages_Free: 18
    HugePages_Rsvd: 18
    HugePages_Surp: 1
    Hugepagesize: 2048 kB


    Q: shouldn't that pagesize-2MB directory contain some cached files? If not then why not? If yes then how should I fix this missing cached files?





    PS: my configuration is below




    • Ubuntu 16.04.5 LTS

    • PHP 7.0.32-0ubuntu0.16.04.1

    • using /usr/sbin/php-fpm7.0










    share|improve this question



























      0












      0








      0








      I'm using php-fpm configured to use file cache like this (php.ini):



      opcache.enable=1
      opcache.file_cache=/var/lib/hugetlbfs/group/www-data/pagesize-2MB
      opcache.huge_code_pages=1


      and by using debug.php:



      <H1>This is normal HTML</H1>
      But the <U>following table</U> is generated by PHP:
      <?php
      phpinfo();
      ?>


      I can see that Zend OPcache is up and running, the opcache is enabled and using my configuration; also opcache-gui is showing the memory being used. When I'm checking /var/lib/hugetlbfs/group/www-data/pagesize-2MB I discover that contains no file (sudo find /var/lib/hugetlbfs/group/www-data/pagesize-2MB -type f) and has 0 size (sudo du -sh /var/lib/hugetlbfs/group/www-data/pagesize-2MB); this also happens even while my php website is continuously stressed with requests. I do find though many directories (e.g. /var/lib/hugetlbfs/group/www-data/pagesize-2MB/0c5f279af5b0301d11f2fde4c3271f7d/.../php-pages/wordpress/wp-content) while also the huge code memory seems to be used:



      grep Huge /proc/meminfo
      AnonHugePages: 14336 kB
      ShmemHugePages: 0 kB
      HugePages_Total: 33
      HugePages_Free: 18
      HugePages_Rsvd: 18
      HugePages_Surp: 1
      Hugepagesize: 2048 kB


      Q: shouldn't that pagesize-2MB directory contain some cached files? If not then why not? If yes then how should I fix this missing cached files?





      PS: my configuration is below




      • Ubuntu 16.04.5 LTS

      • PHP 7.0.32-0ubuntu0.16.04.1

      • using /usr/sbin/php-fpm7.0










      share|improve this question
















      I'm using php-fpm configured to use file cache like this (php.ini):



      opcache.enable=1
      opcache.file_cache=/var/lib/hugetlbfs/group/www-data/pagesize-2MB
      opcache.huge_code_pages=1


      and by using debug.php:



      <H1>This is normal HTML</H1>
      But the <U>following table</U> is generated by PHP:
      <?php
      phpinfo();
      ?>


      I can see that Zend OPcache is up and running, the opcache is enabled and using my configuration; also opcache-gui is showing the memory being used. When I'm checking /var/lib/hugetlbfs/group/www-data/pagesize-2MB I discover that contains no file (sudo find /var/lib/hugetlbfs/group/www-data/pagesize-2MB -type f) and has 0 size (sudo du -sh /var/lib/hugetlbfs/group/www-data/pagesize-2MB); this also happens even while my php website is continuously stressed with requests. I do find though many directories (e.g. /var/lib/hugetlbfs/group/www-data/pagesize-2MB/0c5f279af5b0301d11f2fde4c3271f7d/.../php-pages/wordpress/wp-content) while also the huge code memory seems to be used:



      grep Huge /proc/meminfo
      AnonHugePages: 14336 kB
      ShmemHugePages: 0 kB
      HugePages_Total: 33
      HugePages_Free: 18
      HugePages_Rsvd: 18
      HugePages_Surp: 1
      Hugepagesize: 2048 kB


      Q: shouldn't that pagesize-2MB directory contain some cached files? If not then why not? If yes then how should I fix this missing cached files?





      PS: my configuration is below




      • Ubuntu 16.04.5 LTS

      • PHP 7.0.32-0ubuntu0.16.04.1

      • using /usr/sbin/php-fpm7.0







      php7 huge-pages php-opcache






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 11 mins ago







      adrhc

















      asked Jan 8 at 21:42









      adrhcadrhc

      240111




      240111






















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