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PHP-FPM Experimenting with APCu data only caching with PHP & Zend OpCache

Discussion in 'Centmin Mod Insights' started by eva2000, May 29, 2014.

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  1. May 29, 2014 #1
    eva2000

    eva2000 Administrator Staff Member

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    With PHP 5.5 and using Zend OpCache, you only get PHP opcode caching and loose the user data caching features that other opcode cachers like APC Cache, Xcache had.

    So someone forked the APC Cache project and stripped the opcode caching features out resulting in only user data caching features as the sole purpose. APCu is that forked project at GitHub - krakjoe/apcu: APCu - APC User Cache.

    Xenforo's admin options -> performance has a setting to save public templates as files but it requires opcode cacher like APC Cache or Xcache. But as I am using PHP 5.5.12 with Zend OpCache there is no user data caching features available. So decided to try out APCu data caching on this forum to see how it goes.

    APCu Install on PHP 7.x



    Basic commands used to install APCu

    Code (Text):
    cd /svr-setup
git clone https://github.com/krakjoe/apcu
cd apcu
/usr/local/bin/phpize
./configure --with-php-config=/usr/local/bin/php-config
make -j2
make install


    APCu Install on PHP 5.x



    Basic commands used to install APCu

    Code (Text):
    cd /svr-setup
git clone -b PHP5 https://github.com/krakjoe/apcu
cd apcu
/usr/local/bin/phpize
./configure --with-php-config=/usr/local/bin/php-config
make -j2
make install


    APCu Upgrade Commands



    to upgrade
    Code (Text):
    cd /svr-setup/apcu
git stash
git pull
make clean
/usr/local/bin/phpize
./configure --with-php-config=/usr/local/bin/php-config
make -j2
make install


    Enable & Configure APCu Cache



    Commands to setup the apcu.ini file and APCu settings
    Code (Text):
    CONFIGSCANDIR='/etc/centminmod/php.d'
touch ${CONFIGSCANDIR}/apcu.ini

cat > "${CONFIGSCANDIR}/apcu.ini" <<EOF
extension=apcu.so
  apc.enabled=1
  apc.shm_size=256M
  apc.ttl=7200
  apc.enable_cli=1
  apc.gc_ttl=3600
  apc.entries_hint=4096
  apc.slam_defense=1
  apc.serializer=igbinary
EOF

fpmrestart


    Code (Text):
    ls -lah ${CONFIGSCANDIR}
total 36K
drwxr-xr-x 2 root root 4.0K May 29 18:14 .
drwxr-xr-x 3 root root 4.0K May 24 01:58 ..
-rw-r--r-- 1 root root  177 May 29 18:21 apcu.ini
-rw-r--r-- 1 root root   19 May 24 03:18 geoip.ini
-rw-r--r-- 1 root root  252 May 24 03:18 igbinary.ini
-rw-r--r-- 1 root root   21 May 24 03:18 imagick.ini
-rw-r--r-- 1 root root  115 May 24 03:18 memcached.ini
-rw-r--r-- 1 root root   78 May 24 03:18 memcache.ini
-rw-r--r-- 1 root root  382 May 24 03:23 zendopcache.ini


    Code (Text):
    php --ri apcu                          

apcu

APCu Support => Enabled
Version => 4.0.11
APCu Debugging => Disabled
MMAP Support => Enabled
MMAP File Mask =>  
Serialization Support => php, igbinary
Revision => $Revision: 328290 $
Build Date => Jul 29 2016 20:17:07

Directive => Local Value => Master Value
apc.enabled => On => On
apc.shm_segments => 1 => 1
apc.shm_size => 256M => 256M
apc.entries_hint => 4096 => 4096
apc.gc_ttl => 3600 => 3600
apc.ttl => 7200 => 7200
apc.smart => 0 => 0
apc.mmap_file_mask => no value => no value
apc.enable_cli => On => On
apc.slam_defense => On => On
apc.rfc1867 => Off => Off
apc.rfc1867_prefix => upload_ => upload_
apc.rfc1867_name => APC_UPLOAD_PROGRESS => APC_UPLOAD_PROGRESS
apc.rfc1867_freq => 0 => 0
apc.rfc1867_ttl => 3600 => 3600
apc.preload_path => no value => no value
apc.coredump_unmap => Off => Off
apc.use_request_time => On => On
apc.serializer => igbinary => igbinary
apc.writable => /tmp => /tmp


    Setup APCu admin stats file

    Code (Text):
    cd /svr-setup/apcu

N=$RANDOM
cp apc.php /usr/local/nginx/html/${N}_myapcu.php


    Then edit user/pass in /usr/local/nginx/html/${N}_myapcu.php

    apcu_stats00.png
     
    Last edited: Jul 30, 2016
  2. May 29, 2014 #2
    Matt

    Matt Well-Known Member

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  3. May 29, 2014 #3
    eva2000

    eva2000 Administrator Staff Member

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    oh.. so can you use memcached as I have backend set to libmemcached for Xenforo config.php but the description only mentions opcode cacher ?

    edit: doh looks like APCu doesn't work with Xenforo for this, APCu php file shows zero files cached when enabled for public templates as files :(
     
  4. May 29, 2014 #4
    Matt

    Matt Well-Known Member

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    This is my set up:

    Code:
    PHP 5.5.12 (cli) (built: May 25 2014 19:50:03)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2014 Zend Technologies
    with Zend OPcache v7.0.4-dev, Copyright (c) 1999-2014, by Zend Technologies
    PHP:
    $config['cache']['enabled'] = true;
    $config['cache']['frontend'] = 'Core';
    $config['cache']['frontendOptions']['cache_id_prefix'] = 'mattw_';
    $config['cache']['frontendOptions']['automatic_serialization'] = true;
    $config['cache']['cacheSessions'] = true;
    $config['cache']['backend']='Libmemcached';
    $config['cache']['backendOptions']=array(
                'compression'=>false,
                'servers' => array(
                    array(
                                'host'=>'127.0.0.1',
                                'port'=>'11211',
                                'persistent' => 'true'
                        )
          )
    );
    All the backend stuff goes into Memcached (libmemcached), and the OPCaching is working with ZendOpcache

    upload_2014-5-29_9-47-43.png

    All the bdcache stuff is sitting in Memcached as that uses the backend options.
    upload_2014-5-29_9-49-44.png
     
  5. May 29, 2014 #5
    eva2000

    eva2000 Administrator Staff Member

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    is that with Fetch public templates as files enabled ? or disabled ?
     
  6. May 29, 2014 #6
    Matt

    Matt Well-Known Member

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    upload_2014-5-29_9-52-55.png
     
  7. May 29, 2014 #7
    eva2000

    eva2000 Administrator Staff Member

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    Thanks restarted memcached server and enabled to see what's going on :)

    Disabled APCu as it isn't doing anything with Xenforo heh
     
  8. May 29, 2014 #8
    BamaStangGuy

    BamaStangGuy Active Member

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  9. May 29, 2014 #9
    eva2000

    eva2000 Administrator Staff Member

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    Moving this thread over to Centmin Mod Insights forum so folks can see how a new PHP extension was added manually :)
     
  10. May 30, 2014 #10
    rdan

    rdan Well-Known Member

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    Happy to use Libmemcached also :)
     
  11. Jul 27, 2016 #11
    ethanpil

    ethanpil Active Member

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    Has APCu support been abandoned? Some of us prefer APCu instead of memcached ;)
     
  12. Jul 27, 2016 #12
    eva2000

    eva2000 Administrator Staff Member

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    pretty much has been for centmin mod though you can still follow above 1st post manual install if you want APCu. Though you'd need for your web app to support APCu
     
  13. Jul 30, 2016 #13
    eva2000

    eva2000 Administrator Staff Member

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    FYI, just updated APCu install instructions in 1st post :)

    but they seem to fail to compile :(
    Code (Text):
                                                                                                                        ^
In file included from /svr-setup/apcu/apc.c:36:0:
/svr-setup/apcu/apc_globals.h:44:5: error: unknown type name ‘zend_long’
     zend_long shm_segments;      /* number of shared memory segments to use */
     ^
/svr-setup/apcu/apc_globals.h:45:5: error: unknown type name ‘zend_long’
     zend_long shm_size;          /* size of each shared memory segment (in MB) */
     ^
/svr-setup/apcu/apc_globals.h:46:5: error: unknown type name ‘zend_long’
     zend_long entries_hint;      /* hint at the number of entries expected */
     ^
/svr-setup/apcu/apc_globals.h:47:5: error: unknown type name ‘zend_long’
     zend_long gc_ttl;            /* parameter to apc_cache_create */
     ^
/svr-setup/apcu/apc_globals.h:48:5: error: unknown type name ‘zend_long’
     zend_long ttl;               /* parameter to apc_cache_create */
     ^
/svr-setup/apcu/apc_globals.h:49:2: error: unknown type name ‘zend_long’
  zend_long smart;             /* smart value */
  ^
/svr-setup/apcu/apc.c:41:31: fatal error: zend_smart_str.h: No such file or directory
#   include "zend_smart_str.h"
                               ^
compilation terminated.
make: *** [apc.lo] Error 1


    edit: ah it's because APCu 5.x is PHP 7 only Is APCu-5.1.x not compatible with PHP-5.x? · Issue #171 · krakjoe/apcu · GitHub
     
    Last edited: Jul 30, 2016
  14. Jul 30, 2016 #14
    eva2000

    eva2000 Administrator Staff Member

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    Updated 1st post with separate APCu cache install instructions for PHP 5.x and PHP 7.x branches
     
  15. Apr 13, 2017 #15
    ahmed

    ahmed Active Member

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  16. Apr 13, 2017 #16
    eva2000

    eva2000 Administrator Staff Member

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    in future maybe but for opcode caching default PHP Zend Opcache is still fastest :)
     
  17. Apr 13, 2017 #17
    ahmed

    ahmed Active Member

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  18. Apr 13, 2017 #18
    eva2000

    eva2000 Administrator Staff Member

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    don't use LCache so can't help with that end. APCu should still install as per above guide so technically just install LCache after should work but you'd be on your own for that.
     
  19. Apr 13, 2017 #19
    ahmed

    ahmed Active Member

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    I managed to enable it using your nice guide

    I think the author wants to say Apcu not Lcach

    WP LCache will repopulate the L1 cache (APCu) from the L2 cache (database).
     
  20. Apr 13, 2017 #20
    ahmed

    ahmed Active Member

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