Zend Redis Cache 1.6.0

m1ne · Nov 7, 2016

I get those too.

Xon · Nov 8, 2016

This are commonly caused by latency issues caused by fork() speed(can be slow for some VMs) for when redis creates a save.

For some reason this causes phpredis to be confused with the connection's state. Reducing how often you save to disk helps a lot. Also try updating phpredis too.

Sunka · Nov 8, 2016

Xon said:
Also try updating phpredis too

I am using this last version, but it is no update for months (10.06.2016.)

Xon said:
Reducing how often you save to disk helps a lot

I am saving via cron once at hour.
it has been for months, but this error show up for first time yesterday

otto · Nov 9, 2016

Confused...

@Xon I think I need a hint.

Xenforo 1.5.11, php 5.6.27

PHP Info says:

Redis Server is runing, and I can ping / pong him (redis-cli).
(installed on Ubuntu 14.04.5 LTS after apt-get update and apt-get upgrade then with apt-get install redis-server)

Your addon is the latest version (1.1.14) and no error logs in xenforo to see.

Now Redis ON in config.php with:

PHP:

// Cache Start

// setup redis caching
$config['cache']['enabled'] = true;
$config['cache']['cacheSessions'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array(
'caching' => true,
'cache_id_prefix' => 'xfzf1_',
'lifetime' => 0
);

$config['cache']['backendOptions'] = array(
        'server' => 'zetor-forum.de',
        'port' => 6379,
        );
// install Redis-aware XF Caching replacement. Will break in XF 2.0
require(XenForo_Application::getInstance()->getConfigDir().'/SV/RedisCache/Installer.php');      
       
// $redis = XenForo_Application::getCache()->getBackend()->getCredis();      
// Cache Ende

In ACP it tells me:

But in frontend I have now interesting errors:

1.

instead bevore with Redis Cache OFF:

or 2.

instead bevore with Redis cache OFF:

A redis-cli FLUSHALL changes nothing...

Any Idea whats going wrong when I activate Redis Cache? What will I have forget? hmm...

Sunka · Nov 9, 2016

Where is:

Code:

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

This is mine configuration and working OK.
Try it:

Code:

$config['cache']['enabled'] = true;
$config['cache']['cacheSessions'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array(
'caching' => true,
'cache_id_prefix' => 'YOURPREFIX_',
'automatic_serialization' => false,
'lifetime' => 0
);

$config['cache']['backend'] = 'Redis';
$config['cache']['backendOptions'] = array(
'server' => '127.0.0.1',
'port' => 6379,
'connect_retries' => 2,
'use_lua' => true,
);
require(XenForo_Application::getInstance()->getConfigDir().'/SV/RedisCache/Installer.php');

Xon · Nov 10, 2016

Sunka said:
I am using this last version, but it is no update for months (10.06.2016.)

https://github.com/phpredis/phpredis 's php7 branch is being actively updated, but I have no idea how stable it is.

I am saving via cron once at hour.
it has been for months, but this error show up for first time yesterday

Is it still happening? This is often difficult to troubleshoot.

otto said:
Confused...
@Xon I think I need a hint.

Xenforo 1.5.11, php 5.6.27

PHP Info says:
View attachment 143393
Redis Server is runing, and I can ping / pong him (redis-cli).
(installed on Ubuntu 14.04.5 LTS after apt-get update and apt-get upgrade then with apt-get install redis-server)

Your addon is the latest version (1.1.14) and no error logs in xenforo to see.

Now Redis ON in config.php with:

PHP:

// Cache Start // setup redis caching $config['cache']['enabled'] = true; $config['cache']['cacheSessions'] = true; $config['cache']['frontend'] = 'Core'; $config['cache']['frontendOptions'] = array( 'caching' => true, 'cache_id_prefix' => 'xfzf1_', 'lifetime' => 0 ); $config['cache']['backendOptions'] = array( 'server' => 'zetor-forum.de', 'port' => 6379, ); // install Redis-aware XF Caching replacement. Will break in XF 2.0 require(XenForo_Application::getInstance()->getConfigDir().'/SV/RedisCache/Installer.php'); // $redis = XenForo_Application::getCache()->getBackend()->getCredis(); // Cache Ende

In ACP it tells me:
View attachment 143386

But in frontend I have now interesting errors:

1.
View attachment 143387

instead bevore with Redis Cache OFF:
View attachment 143388

or 2.
View attachment 143389

instead bevore with Redis cache OFF:
View attachment 143390

A redis-cli FLUSHALL changes nothing...

Any Idea whats going wrong when I activate Redis Cache? What will I have forget? hmm...

I'm fairly sure it is that you are missing the line:

Code:

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

There is likely an error in the outputed css files which gives some hint to this.

otto · Nov 10, 2016

Oh damn... Ok, added and cache prefix changed - but the same as bevore.

PHP:

// setup redis caching
$config['cache']['enabled'] = true;
$config['cache']['cacheSessions'] = true;
$config['cache']['frontend'] = 'Core';
$config['cache']['frontendOptions'] = array(
'caching' => true,
'cache_id_prefix' => 'xfzfde_',
'automatic_serialization' => false,
'lifetime' => 0
);
$config['cache']['backend'] = 'Redis';
$config['cache']['backendOptions'] = array(
        'server' => '127.0.0.1',
        'port' => 6379,
        );
// install Redis-aware XF Caching replacement. Will break in XF 2.0
require(XenForo_Application::getInstance()->getConfigDir().'/SV/RedisCache/Installer.php');

It looks like its a CSS problem when Redis caching is on.

Xon said:
There is likely an error in the outputed css files which gives some hint to this.

I take a look at this xenforo with the errors above and my test installation on same server, same php version, same redis (other prefix), same browser and also with Kaspersky IS aktive (but blocked) without errors.
The only difference is this error in the developer console:

Here the screens from dev console to this error:

In the other Xenforo (test installation) this error dont exist and I see no style problems.

Sunka · Nov 10, 2016

Xon said:
https://github.com/phpredis/phpredis 's php7 branch is being actively updated, but I have no idea how stable it is.

I pull redis PHP extension for PHP 7.x from official pecl downloads. As per this post, I choose pecel not github

Xon said:
Is it still happening? This is often difficult to troubleshoot.

Nop, just that night and never before nor after (knocking on wood)

Xon · Nov 19, 2016

Xon updated Zend Redis Cache with a new update entry:

Feature Update

Code:
Redis Sentinel support for high-availability. See http://redis.io/topics/sentinel for more information.

Enable with:

Code:

$config['cache']['backendOptions']['sentinel_master_set'] = 'mymaster'; $config['cache']['backendOptions']['server'] = '127.0.0.1:26379';

'server' now points to a comma delimited list of sentinal servers to find the master.

'mymaster' must match sentinel configuration.

the port must be explicitly listed

Read the rest of this update entry...

Xon · Nov 30, 2016

Xon updated Zend Redis Cache with a new update entry:

Maintenance Update

Attempt to reduce latency warnings or broken pipe due to timeouts.

Tweak redis command usage to block less by fetching less data at once when invalidating css caches

Track latest upstream libraries

Read the rest of this update entry...

otto · Dec 1, 2016

Any ideas for this: https://xenforo.com/community/threads/zend-redis-cache.91023/page-10#post-1111730 ??

Xon · Dec 1, 2016

otto said:
Any ideas for this: https://xenforo.com/community/threads/zend-redis-cache.91023/page-10#post-1111730 ??

Can you try disabling all other add-ons? Something is going very wrong, and it is hard to troubleshoot to any extend sorry

otto · Dec 1, 2016

Ok, I can make a clean Testinstallation with a xenforo 1.5.11, Redis and your add-on. And then I come back and post the results.

vlom31 · Dec 7, 2016

Hi @Xon

Do you know please if your add-on will help solve the problem i'm having ?
https://xenforo.com/community/threads/please-help-sql-caching-optimization.123900/

Mehdi

Xon · Dec 8, 2016

vlom31 said:
Hi @Xon

Do you know please if your add-on will help solve the problem i'm having ?
https://xenforo.com/community/threads/please-help-sql-caching-optimization.123900/

Mehdi

It would not directly help.

But Redis would be idea to make an atomic sliding "new posts" window with relatively minor effort with it's APIs.

vlom31 · Dec 8, 2016

Atomic sliding new posts with api .. hmm, you lost me there

I'll look into it thanx.

In the meantime, I installed everything on my server, and setup config.php etc but

Mehdi

vlom31 · Dec 8, 2016

Still nothing in To/From redis .. and site is active, should be some value there no?

Xon · Dec 8, 2016

vlom31 said:
Still nothing in To/From redis .. and site is active, should be some value there no?

This value is only populated when dealling with redis +3.0, 2.8 doesn't report those stats.

vlom31 · Dec 8, 2016

Xon said:
This value is only populated when dealling with redis +3.0, 2.8 doesn't report those stats.

Ah, ok makes sense then.

Any other way to monitor if the thread list is transiting via redis or not ? I checked on phpRedisAdmin and I don't see it :/

Mehdi

m1ne · Dec 8, 2016

redis-cli MONITOR
In ssh.

Zend Redis Cache 1.6.0

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