LEMP Wordpress: php5-fpm.sock failed

Hi,

Lately my server has been going down more and more often. It started once a month, then twice, but now its constantly crashing. Im completely new to this, so im lost to where i should start looing for answers. But im pretty sure this has to do with memory. Though not because of traffic, but likely due to configuration.

So im just gonna paste the errors I get, and hope that some of you can help me figure this out.

The droplet is a 1gb, Ubuntu 14.04 x64 vmlinuz-3.13.0-57-generic, wordpress on LEMP.

Im running monit, which at this moment is constantly telling me that php5 is failing. A service mysql restart is fixing it for a couple of minutes before it fails again.

###nginx error.log is repeating this:

2016/01/09 18:58:31 [error] 2507#0: *9 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 85.159.237.219, $.219, server: mydomain.no, request: "POST /xmlrpc.php HTTP/1.0", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "xx.xx.xx.xx"

###syslog

Jan  9 19:07:12 mydomain kernel: [ 1350.422250] perf samples too long (20030 > 20000), lowering kernel.perf_event_max_sample_rate to 6250

Jan  9 18:45:29 mydomain kernel: [   47.269310] random: nonblocking pool is initialized

###php5-fpm.log

[09-Jan-2016 18:50:45] NOTICE: configuration file /etc/php5/fpm/php-fpm.conf test is successful

###monit mails

1. Connection failed Service nginx … Resource temporarily unavailable
2. Connection failed Service php5-fpm
3. Execution failed Service php5-fpm … failed to stop

I have setup a swap following this tutorial http://do.co/1JCf6pf, but im really not sure how to see if it works/i did it the right way.

I really want to understand how to debug memory-issues, as im sure that is the problem. But i really dont know where to begin.

A nudge in the right direction is much appreciated.