need help in server load analysis and practice to reduce them

[Saurabh Jain]

My site is in trouble with server load  reaching 9  for 4 cpu's  

Please suggest basic as well as advanced steps to take forward for reduction of server load

 

and also the steps to analyse  and make server secure...

 

I am using VPS service...

[Saurabh Jain]

It seems cachin is disabled...

which option will give better performance...

 

or which are the parameters to consider for selecting the same....

How can we find in WHM   which is installed or not?

 

Regards

Saurabh

[AlexJ]

I have used Xcache and it works out well for us.

[Saurabh Jain]

Reply from my webhost

 

By default you get a basic cPanel server which can be configured to your liking. All caching services are considered third party and are not provided by us. This would be considered advanced support and result in a fee. However if you do not need our help we can direct you in the right place to install. Please keep in mind we do not support troubleshooting of these services.

eaccelerator is probably the simplest to install. https://www.siteground.com/kb/how_to_install_eaccelerator_in_cpanel/
memcache - http://crybit.com/easy-way-to-install-memcached-and-memcache-in-a-cpanel-server/
xcache - http://www.photonvps.com/billing/knowledgebase.php?action=displayarticle&id=93
apc - http://www.joomlaworks.net/blog/item/153-install-apc-apcu-on-a-whm-cpanel-server
 

Which one will you suggest......

[AlexJ]

I don't use Centos, so I can't say much but for myself, I prefer Xcache since it has always worked fine for us. I am pretty familiar with it and I don't have to mess around. Currently using PHP 5.6.9 and Xcache 3.2.0 on Debian. Go with Xcache since it has var caching as well. 

[RevengeFNF]

Do you use Zend Opcache?

[Makoto]

If you are utilizing a single server setup, APC/APCu is generally ideal for userland cache.