Плагин Redis Cache By Xon v2.18.1

[XenForo]

InoryS добавил(а) новый ресурс:

Redis Cache By Xon - This add-on uses Credis with a custom cache provider for Redis

This add-on uses

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with a custom cache provider for

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(based off

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). For best performance, install the php extension...

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Сообщение автоматически объединено: 21.02.22

FAQ

Q: There are a lot of the errors; "CredisException: read error on connection" or "CredisException: protocol error, got 'xxx' as reply type byte" being logged
A: Please be aware that Redis is very sensitive to latency in a virtual environment. If repeated connection failures or protocol errors are experienced disable any

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options. Additionally, check CPU steal as this can also cause latency issues.

Additionally, check the redis log file ( /var/log/redis/redis.log ) for any warnings. Key things to look for:

• WARNING you have Transparent Huge Pages (THP) support enabled in your kernel
  Spoiler: Transparent Huge Pages fix
  Run:
  Code:
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
  Add to /etc/rc.local
  Code:
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
• WARNING /proc/sys/net/core/somaxconn is set to the lower value of 128
  Spoiler: somaxconn fix
  Run:
  Code:
  sysctl -w net.core.somaxconn=512
  Add to /etc/sysctl.d/redis.conf (or /etc/sysctl.conf)
  Code:
  net.core.somaxconn=512
  You may require to adjust "net.ipv4.tcp_max_syn_backlog" to be larger!
• WARNING overcommit_memory is set to 0! Background save may fail under low memory condition
  Spoiler: overcommit fix
  Run:
  Code:
  sysctl -w vm.overcommit_memory =1
  Add to /etc/sysctl.d/redis.conf (or /etc/sysctl.conf)
  Code:
  vm.overcommit_memory =1

Spoiler: overcommit fix
(All 'fixes' require restarting redis to apply).

You may need to increase tcp-backlog from the stock 511, please ensure net.core.somaxconn is adjusted as well!

This server configuration advise is best effort, and not guarantied as it is well outside the scope of this add-on.

Q. CPU Steal is mentioned as causing latency issue, how do I check this.
A. On Linux, run:
Code:
screen
iostat -c -t 30 > /tmp/cpu_stats.log
Then after a day or so; check your max CPU steal:

Код:
cat /tmp/cpu_stats.log | grep -v iowait | awk '{print $5;}' | sort -rn | more
Q: Support for earlier versions of XenForo
A: See

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add-on for XenForo 1.4+ support

Q: Redis Configuration
A: Please see the

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.

Alternatively, you can use @eva2000's

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Guide.

Q:Make Redis behave like Memcache
A: See

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, and make sure to set maxmemory!

For Redis 3.x, consider adding "maxmemory-policy allkeys-lru".

You may wish to disable the periodic 'save' directives which can cause latency on high-usage websites in virtual environments.

Q: Sample XenForo Configuration using TCP
A: Please see

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for details on setting up the general XenForo Cache.

The minimum configuration is:
Код:

$config['cache']['enabled'] = true;

$config['cache']['provider'] = 'SV\RedisCache\Redis';

$config['cache']['config']  = array(

        'server' => '127.0.0.1',

        'port' => 6379,

        'compress_data' => 6,

    );

Q: Sample XenForo Configuration using a socket
A: Please see

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for details on setting up the general XenForo Cache.

The minimum configuration is:
Код:

$config['cache']['enabled'] = true;

$config['cache']['provider'] = 'SV\RedisCache\Redis';

$config['cache']['config']  = array(

        'server' => 'unix:///tmp/redis.sock',

        'compress_data' => 6,

    );

Q. When trying to use a socket, an exception with "No such file or directory" is thrown
A. There are a few reasons this could happen;

After confirming that the socket path is correct, try the following suggestions:

• selinux is preventing php from accessing the socket.
• open_basedir is preventing php from accessing the socket.
• chroot is preventing php from accessing the socket.
• permissions are preventing php from reading/writing to the socket.

Q: Sample Single Redis Slave Configuration
A:

The minimum configuration is:
Код:

$config['cache']['enabled'] = true;

$config['cache']['provider'] = 'SV\RedisCache\Redis';

$config['cache']['config'] = array(

        'server' => '127.0.0.1',

        'port' => 6379,

        'compress_data' => 6,

    );

$config['cache']['config']['load_from_slave'] = array(

        'server' => '127.0.0.1',

        'port' => 6378,

        'compress_data' => 6,

    );

Q: Sample Redis Sentinel Configuration
A:

Redis Sentinel support for high-availability. See

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for more information.
Enable with:
Код:

$config['cache']['config']['sentinel_master'] = 'mymaster';

$config['cache']['config']['server'] = 'tcp://127.0.0.1:26379';

'server' now points to a comma delimited list of sentinel servers to find the master. Note; the port must be explicitly listed

To load data from slaves use;
Код:
$config['cache']['config']['load_from_slaves'] = true;
By default, a local slave is preferred, this can be changed by setting:
Код:

$config['cache']['config']['slave_select_callable'] = function (array $slaves) {

        $slaveKey = array_rand($slaves, 1);

        return $slaves[$slaveKey];

};

Setting to false (or some non-callable) will fall back to a random slave.

Q: Performance - Redis
A: See:

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Q: phpredis supports persistent connection, are these recommended?
A: I do not recommend using persistent connections, as they appear to be quite buggy.

Q: Enabling Lua Scripting in Redis
A: This requires at least Redis 2.6.0, and setting "use_lua" the the configuraton:

Код:

$config['cache']['backend'] = 'Redis';

$config['cache']['backendOptions'] = array(

'server' => '127.0.0.1',

'port' => 6379,

'connect_retries' => 2,

'use_lua' => true

);

 

[XenForo]

XenForo обновил(а) ресурс Redis Cache By Xon новой записью:

Redis Cache By Xon v2.18.1

• Исправлена поддержка XF2.3 для некоторых дополнений в зависимости от расширенной функциональности redis

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