[wp-hackers] APC-Nginx-Apache problems / memory problems on VPS

[Braydon]

Have you tried SuperCache and .htaccess rules to go past any PHP?

On 08/26/2011 03:49 PM, Ian Douglas wrote:
> Hi,
>
> I'm on a Level 3 HostGator VPS: 1.13Ghz / 768MB RAM / 30GB HD / 500GB bandwidth.
>
> I have a site that usually serves 4000 pages a day.
>
> I just renewed my Wordpress site with a new theme (commerically available from a reputable company, so I'm pretty confident of the code) and some extra plugins for functionality. Before renewing, sometimes I'd get database connection errors on the shared account I was on. Eventually, I had to move to the VPS because the site was deemed to be pulling too many server resources.
>
> I was being suspended.
>
> So we did the move. Then the trouble really started.
>
> Even with 768MB RAM, I can't keep the site up. HostGator admins at first said I should disable plugins (I hate this kind of response; it is avoidance. The plugins are there for essential functionality; the question is how to get the install I want to work). In reality, there are only a few plugins that actually add to what is rendered on the main page. So far as I can see, there's nothing there that should be a massive resource hog. And there's nothing that I haven't used without problems before in a shared hosting environment.
>
> In an effort to minimise the load on the server I did the following:
>
> 1. Activated W3 Total Cache and a good number of its options
> 2. Established an account with CloudFlare and changed the DNS so I'm using their caching / CDN system
> 3. Configured APC to take the load off php
> 4. Configured Nginx to work as a reverse proxy on the server
>
> This combination, at least according to some, is about state of the art when it comes to performance Wordpress sites.
>
> But after configuring both Apache and Nginx, and getting both processes restarted, the site doesn't work. Apparently Nginx drops connections to clients.
>
> Both httpd and nginx daemons are running fine and the config check for both yields "Success" or "OK" output!.
>
> Apache's port is set to 81 and it is the stock Apache that comes with CPanel.
> Nginx is taking over port 80
>
> The site is not working even if you connect to http://mysite.com:81
>
> Using Easyapache to rebuild the httpd server did not positively affect the situation.
>
> Here are the Config Check Outputs:
>
> --------------------------------------------------------------------------------------------------------
>
> root at server [/usr/local/nginx/sbin]# apachectl configtest
> Syntax OK
>
> --------------------------------------------------------------------------------------------------------
>
> root at server [/usr/local/nginx/sbin]# /usr/local/nginx/sbin/nginx -t
> nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
> nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
>
> --------------------------------------------------------------------------------------------------------
>
> root at server [/usr/local/nginx/sbin]# ps -ef | grep -i nginx
> root      1202     1  0 15:39 ?        00:00:00 nginx: master process ./nginx
> nobody    1203  1202  0 15:39 ?        00:00:00 nginx: worker process
> root      1422  1147  0 15:46 pts/1    00:00:00 grep -i nginx
>
> --------------------------------------------------------------------------------------------------------
>
> root      1455  1147  0 15:47 pts/1    00:00:00 grep -i httpd
> root     32662     1  0 15:39 ?        00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
> nobody   32677 32662  0 15:39 ?        00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
> root     32684 32662  0 15:39 ?        00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
> nobody   32687 32662  0 15:39 ?        00:00:00 /usr/local/apache/bin/httpd -k start -DSSL
>
>
> Does anyone have any experience of getting APC, Nginx, Apache, Cloudflare and W3 Total Cache to play together on a VPS?
>
> The site has been down now two days. I'm desperate to troubleshoot this to get it back.
>
> Would really appreciate some help.
>
> best,
> ian
>
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