When you do a fresh install of prestashop, just after it finishes you need to rename the “admin” directory. The problem is that with the last two installs we did (as part of WebIngenia), we ended up with a blank/empty/white webpage. The only way to solve it was to clear the opcode cache from APC. So, if you encounter the same problem, you know what to do, you just need to clear the APC opcode cache and continue the install. ...
One or two weeks ago, I made a simple AB benchmarking test on a PHP site I built, it was ok. Then I did the same test on this blog and well… It was freaking slow… On 100 pages with 10 concurrent access, it took 3.5 to 10s to render. Well, I thought I should remove all these plugins I installed to make me and my blog famous (they didn’t perform well). It reduced the generation time by something like 100 ms. ...
I updated APC from 3.0 to 3.1 because it totally locked my webserver, it was making it accept HTTP connection but never give any reply. I had some problem accessing the WordPress 3.0 (latest SVN version) admin interface after that upgrade : Fatal error: Call to undefined function wp_dashboard_setup() in /home/sites/clairambault.fr/florent/wp-admin/index.php on line 15 the bad line is : require_once(ABSPATH . 'wp-admin/includes/dashboard.php'); I just found out here it was because I activated APC with the “apc.include_once_override” option set to 1. If you encounter the same problem, just set it to 0 or change the include by something without the ABSPATH constant like for instance : ...