Answered MODX2.3.1 setup on Ubuntu 14.04/NGinX/MariaDB FAILS and leads to "502 bad gateway"

After using MODX/manager for a while (a couple hours) I am suddenly again getting "502 bad gateway" responses! )-:

As expected, uninstalling XCache resolves the issue.


Quote from: AMDbuilder at Sep 14, 2014, 06:15 PM

The one recommendation I would make is switching to APC instead of xcache, as MODX should leverage it better (and it's more performant).

Do you have experience with APC on Nginx? Is it possible this will lead to the same 502 problems?

Also, why do you say APC is more performant? Is this a MODX specific observation? Everything I've read about the current state of affairs in PHP caching seems to indicate XCache is more performant. [And as of 5.6 it apparently makes sense to use the built in Zend optimizer . . . ]

Either way, perhaps the cache should be setup so that MODX/manager is not cached?

Quote from: fbachofner at Sep 14, 2014, 07:22 PM

[And as of 5.6 it apparently makes sense to use the built in Zend optimizer . . . ]

It turns out this is already in 5.5x which I am running.

I've enabled Opcache and will report back. Hopefully I'll get more than 2 hours use before a 502 error!

;-)

Yes, we use APC with PHP 5.4 at this point in time with no problems. My research at the time indicated that APC was the more performant solution at the time. Naturally, with PHP 5.5 you do have built in opcaching, but I haven't done much testing with it at this time.

There are pros/cons to being on the cutting edge