cPanel shows constant massive VM usage

Hi, hope this is the right forum (website) for this.

Recently my website has been using massive amounts of virtual memory - cpanel has it at over a 1.2gb.

My webhost has increased it twice but I can still see the odd 'PHP Out of memory... error' in the browser and 500 internal errors and the VM is constantly 'in the red'.

The error_log is littered with these errors for nearly every php file and something called [eAccelerator]. I've removed/deactivated and uninstalled most of the plugins (I removed all at one point) that were installed but the removal had no effect - no reduction in memory usage.

nb: The same theme/framework (Headway) and plugins run great on my own personal site which is a very basic web hosting package.

Thanks for any help.

 

Hi, thanks for replying Michael.

No root access, it's on a shared hosting account. The VM is now maxed out constantlly at 1.5gb. The site loads only occasionally now.

 

the error_log has nearly a thousand errors in it - Sample below.
I do notice the different timezone listed [America/New_York] with [eAccelerator].

Code:

[12-Nov-2013 19:28:44 UTC] PHP Fatal error:  Out of memory (allocated 11534336) (tried to allocate 538088 bytes) in /home/comartsp/public_html/wp-settings.php on line 207
[12-Nov-2013 19:29:47 UTC] PHP Fatal error:  Out of memory (allocated 12845056) (tried to allocate 159824 bytes) in /home/comartsp/public_html/wp-content/themes/headway/functions.php on line 17
[12-Nov-2013 19:29:52 UTC] PHP Fatal error:  Out of memory (allocated 9961472) (tried to allocate 546368 bytes) in /home/comartsp/public_html/wp-content/plugins/lightbox-plus/lightboxplus.php on line 105
[12-Nov-2013 19:30:55 UTC] PHP Fatal error:  Out of memory (allocated 12320768) (tried to allocate 488848 bytes) in /home/comartsp/public_html/wp-includes/functions.php on line 2754
[12-Nov-2013 19:31:29 UTC] PHP Fatal error:  Out of memory (allocated 11534336) (tried to allocate 538088 bytes) in /home/comartsp/public_html/wp-settings.php on line 207
[12-Nov-2013 19:32:08 UTC] PHP Fatal error:  Out of memory (allocated 10747904) (tried to allocate 538088 bytes) in /home/comartsp/public_html/wp-settings.php on line 203
[12-Nov-2013 14:33:50 America/New_York] PHP Warning:  [eAccelerator] Can not create shared memory area in Unknown on line 0
[12-Nov-2013 14:33:50 America/New_York] PHP Fatal error:  Unable to start eAccelerator module in Unknown on line 0
[12-Nov-2013 19:35:27 UTC] PHP Fatal error:  Out of memory (allocated 6553600) (tried to allocate 12 bytes) in /home/comartsp/public_html/wp-includes/script-loader.php on line 28
[12-Nov-2013 19:37:02 UTC] PHP Fatal error:  Out of memory (allocated 6291456) (tried to allocate 1 bytes) in /home/comartsp/public_html/wp-settings.php on line 119
[12-Nov-2013 19:39:33 UTC] PHP Fatal error:  Out of memory (allocated 5767168) (tried to allocate 71 bytes) in /home/comartsp/public_html/wp-includes/option.php on line 148
[12-Nov-2013 19:40:34 UTC] PHP Fatal error:  Out of memory (allocated 6029312) (tried to allocate 101 bytes) in /home/comartsp/public_html/wp-includes/option.php on line 149
[12-Nov-2013 19:41:34 UTC] PHP Fatal error:  Out of memory (allocated 6291456) (tried to allocate 1 bytes) in /home/comartsp/public_html/wp-settings.php on line 119
[12-Nov-2013 19:42:48 UTC] PHP Fatal error:  Out of memory (allocated 6029312) (tried to allocate 101 bytes) in /home/comartsp/public_html/wp-includes/option.php on line 149
[12-Nov-2013 19:44:33 UTC] PHP Fatal error:  Out of memory (allocated 7077888) (tried to allocate 339952 bytes) in /home/comartsp/public_html/wp-settings.php on line 203
[12-Nov-2013 19:45:47 UTC] PHP Fatal error:  Out of memory (allocated 12845056) (tried to allocate 159824 bytes) in /home/comartsp/public_html/wp-content/themes/headway/functions.php on line 17

 

Thanks, they've already increased it twice and each time the amount of RAM used has crept up to max - obviously not a situation that can go on forever.
I was hoping to be able to track down the cause.