Can I install 2 cache systems on a VPS?

Aaron Lavers · May 30, 2016

Just purchased an unmanaged VPS on the forum with 2GB of RAM, I want to speed up my benchmark on the VPS by installing 2 cache systems are Varnish and Memcached on it. Is it possible? do they conflict together?

please advise. Thanks

RDO Servers · May 30, 2016

You can, but I dont think it would help you.

What else are you running on the VPS?

Remember that caching systems work by storing your content in RAM. If you only have 2Gb of RAM, most of that is probably being used by your OS, control panel, MySQL, and Apache. There is not a lot left over for storing cached content.

VirtuBox · May 31, 2016

The solution varnish + memcache is only used in huge configuration and with a load-balancing. With 2GB RAM you haven't enough memory to cache the PHP for a app like Magento. So you shouldn't use a system to cache static files. If you want to speed up your website, cache at first pour php with opcache or another, and use memcache to store this cache in your RAM.
But for static files, with less than 8GB RAM, you will only have slow down when the vps will use his swap.
You need at least 3 VPS for a solution varnish + memcache.

VirtuBox · Jun 6, 2016

Yes you can use opcache + memcache to get good performance.
opcache only need few MB, and you can use up to 512MB with memcache.

Another good solution is to use the pagespeed module for apache or nginx and to store his cache in RAM with memcache.

VirtuBox · Jun 14, 2016

No the same use, opcache is for php code. And memcache for static assets.

You have to use both of them to make a complete cache, so mysql will not have any request.

mehrdadali14 · Mar 8, 2018

Not ever installed pagespeed module for my VPS, what does it help improve for?

very helpfull to web loading pages
varnish i think is best cache system but all this depend to your configuration

Can I install 2 cache systems on a VPS?

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