How to setup APC with 1.1?

[Deleted member 745]

Hi,

Do we still have to use the same setup as we did with 1.0?

  $config['cache']['enabled'] = true;
 
  $config['cache']['frontend'] = 'Core';
 
  $config['cache']['frontendOptions'] = array ( 'caching' => true, 'automatic_serialization' => true, 'lifetime' => 10800, 'cache_id_prefix' => 'ds' );
 
  $config['cache']['backend'] = 'Apc';

 

[Floris]

This is how I run XenFans.com with APC

 

[Paul B]

The help manual has been updated: http://xenforo.com/help/cache/

 

[Deleted member 745]

If I enable debug mode it keeps jumping to the homepage if I goto http://mysite.com/?_debug=1

How can I check if APC as loaded if I cant load the debug page?

 

[Floris]

APC comes with apc.php, put that file inside your public_html/ and load it from the browser.

 

[Deleted member 745]

You mean APC in XF? as I cant find no apc.php file?

UPDATE - it looks as if I need to upgrade my PHP/APC

 

[Gene Steinberg]

I'm using the latest APC, 3.1.9 (warning: 3.1.8 has a nasty conflict with WordPress). I set up your config file to use 'Apc' as backend cache.

But I have this phenomenon: Since setting up APC, whenever I navigate around the Admin panels, I am constantly forced to login again. Anyone with a solution, an APC setting change, anything?

This is my current setup:

extension="apc.so"
apc.enabled=1
apc.shm_segments=3
apc.optimization=0
apc.shm_size=256M
apc.ttl=7200
apc.user_ttl=7200
apc.num_files_hint=1024
apc.mmap_file_mask=/tmp/apc.XXXXXX
apc.enable_cli=1
apc.slam_defense=Off
apc.cache_by_default=1
suhosin.apc_bug_workaround=1

If someone has a better idea, do let me know. I copied this one from someone who said it'd work great in WordPress.

One More Thing: This problem only happens on one of our forums: http://forum.theparacast.com. The others are free of the symptom, yet. The only difference that I can see is the use of the Product-XenFans.com-Popular-Content add-on with our largest forum. Anyone else see that as a potential conflict? Or should I be changing my APC setup any?

 

[dieketzer]

I'm using the latest APC, 3.1.9 (warning: 3.1.8 has a nasty conflict with WordPress). I set up your config file to use 'Apc' as backend cache.

But I have this phenomenon: Since setting up APC, whenever I navigate around the Admin panels, I am constantly forced to login again. Anyone with a solution, an APC setting change, anything?

This is my current setup:

extension="apc.so"
apc.enabled=1
apc.shm_segments=3
apc.optimization=0
apc.shm_size=256M
apc.ttl=7200
apc.user_ttl=7200
apc.num_files_hint=1024
apc.mmap_file_mask=/tmp/apc.XXXXXX
apc.enable_cli=1
apc.slam_defense=Off
apc.cache_by_default=1
suhosin.apc_bug_workaround=1

If someone has a better idea, do let me know. I copied this one from someone who said it'd work great in WordPress.

One More Thing: This problem only happens on one of our forums: http://forum.theparacast.com. The others are free of the symptom, yet. The only difference that I can see is the use of the Product-XenFans.com-Popular-Content add-on with our largest forum. Anyone else see that as a potential conflict? Or should I be changing my APC setup any?

i had the cp relog issue and it was due to the fact that too little memory was allocated to apc. i suspect each of your relogs increases the cache full count by 1.

 

[Gene Steinberg]

I think 256MB is more than sufficient (default is 32M). And, as I said, it happens in only one of my three forums.

 

[Deebs]

I think 256MB is more than sufficient (default is 32M). And, as I said, it happens in only one of my three forums.

Have you checked and confirmed by browsing to apc.php ? That script can also allow you to browse the cache.

One thing, you are using a different cache prefix for each site?

 

[Gene Steinberg]

Checked and confirmed what?

I'm not using any custom cache prefixes.

 

[Deebs]

Checked and confirmed what?

I'm not using any custom cache prefixes.

That 256mb is sufficient, ie confirm by using apc.php that you are not running out of memory.

If you are hosting all three sites on the same server with APC and not using a cache prefix you will run into problems.

 

[Gene Steinberg]

It is not running out of memory. And this is the only problem I've seen. How do you set a cache prefix and where?

 

[Gene Steinberg]

So nobody have an answer?

 

[Deebs]

So nobody have an answer?

How to set a prefix is in the config posted in the first post of this thread.

 

[Gene Steinberg]

Trying.

 

[Gene Steinberg]

So far I changed the prefixes, but nothing changed.

 

[Deebs]

To be able to really debug this I would like access to apc.php including the login. (You are using APC for the backend?)

 

[Gene Steinberg]

I will open a conversation with you on this, OK?

I am using APC on the backend.

 

[Gene Steinberg]

I had pleasant conversations with Deebs, who has tried to be very helpful.

FYI: I got this suggestion from cPanel support if you're running into troubles with an PHP cache utility. Recompile Apache and remove mod_deflate. That is a potential troublemaker.