Reducing multiple wordpress websites TTFB

I have about 5 websites running all with different TTFB but all made with Wordpress. I setup a new 1gb ram ubuntu 14.04LTS thinking a new clean install would fix it - but did not, unfortunately.

Once the homepage is loaded, the subpages load quick enough. My guess the server has a hard time loading all the Wordpress PHP, Ajax scripts and what not which causes the slow loads. Loading purely a http://www.domain.com/img.jpg from the server for example loads instantly so it's definately not a DNS problem.

TTFB averages 5 to 15 seconds, 30seconds or even refuses to load. Turning off plugins or changing themes helps a little bit but doesn't take care of the problem.

I use the W3 total cache plugin. I tried to switch on/off some of those options without too much difference in result.

Are there tests I can run that can find the cause of this? Or is there some memory or Apache setting that I can fine tune that will speed things up? I feel like I've researched all I could on this subject without any luck :roll:

My Setup:

PHP 5.5.9-1ubuntu4.9 (cli)

Apache/2.4.7

mysql Ver 14.14 Distrib 5.5.43,

I run ubuntu 14.04LTS of 1gb ram.

2800 MHz Intel(R) Celeron(R) M processor 1.50GHz

$ egrep –color 'Mem|Cache|Swap' /proc/meminfo

MemTotal: 1011464 kB

MemFree: 25740 kB

MemAvailable: 502984 kB

Cached: 433468 kB

SwapCached: 4868 kB

SwapTotal: 262140 kB

SwapFree: 210624 kB

Apache setup:

 <ifmodule mpm_prefork_module="">StartServers          2
    MinSpareServers       6
    MaxSpareServers      12
    MaxClients          15
    MaxRequestsPerChild   3000</ifmodule> 
KeepAlive Off
MaxKeepAliveRequests 100

~~http://www.seomandarin.com/wp-content/u … inode1.jpg">http://www.seomandarin.com/wp-content/uploads/linode1.jpg" />

~~http://www.seomandarin.com/wp-content/u … inode2.jpg">http://www.seomandarin.com/wp-content/uploads/linode2.jpg" />

~~http://www.seomandarin.com/wp-content/u … inode3.jpg">http://www.seomandarin.com/wp-content/uploads/linode3.jpg" />

![](http://www.seomandarin.com/wp-content/u … inode4.jpg">http://www.seomandarin.com/wp-content/uploads/linode4.jpg" />~~