Beta Branch Exhausted memory errors when moving to beta09

Just moving over 1 of my WordPress sites to a different ramnode openvz, 512mb -> 512mb but I upgraded to centos 7 and the beta09 branch. I do remember vaguely setting my php.ini max memory to something over 128M originally and this time I put it into the custom_ini that's inside /php.d/ and I even raised it higher than 128M but regardless I still get a ton of

Code:

[31-May-2016 15:02:56 UTC] PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 16235705 bytes) in /home/nginx/domains/421flavors.com/public/wp-includes/wp-db.php on line 1127

Code:

[root@srvr ~]# free -m

              total        used        free      shared  buff/cache   available

Mem:            512           0         355         154         156         368

Swap:           256         123         132

Most people say to add more swap, but originally it was working on my last openvz, did the beta09 and/or centos 7 change things or configs that I should know about?

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aww, cause I'm currently (read: successfully) hosting 3 other sites on 512mb openvz's - centmin08's with centos 7 only major difference being php 7 opposed to php 5.6 on this troublesome one.

 

Noted.

However, I just solved my problem by upgrading to PHP 7 on this as well, had to toss an old plugin I used but it was worth it. I'll have to wait to run a mysql tuner to get the right speed but I think it will work out since the site gets only a few thousand visitors daily.