A website of ours, are having performance issue.
We are hosting it on Digital Ocean, with pretty good specification (12 core, 32 GB RAM, SSD drive). Frontend in seperated from Backend, through Virtual Machine.
We have a sluggish Prestashop performance.
- around 7 seconds of first byte time
- server response time is slow
- caching: tried to use Memcache and APC, but implementation was not a perfect
- concurrency: with less than 100 users at same time CPU usage is more than 60%
- CDN: when we activate CDN, it increases our CPU usage high
We want to speedup the overall performance and sustain more concurrent user
Can you please advise what is the best next step possible?