What can be done with a heavy load on the server?

Question

WordPress

The situation is this - traffic has increased dramatically, the number of requests to the server has increased and the page loading speed has decreased - the site slows down a lot. It is clear that you need to increase the capacity - move to a more productive server and preferably a separate physical one.
But when you need to solve the problem urgently and very budget, what can be done?

Answer 1

* memcached
* correct nginx setup. Including cache on the user's side not only static, say for 3 seconds.
* remove all unnecessary
* move the database to another server.
* move statics to CDN

Answer 2

1. Install and properly configure the caching plugin
2. Optimize and minify js, if possible, load them from CDN
3. Use https://jetpack.me/support/photon/
for images 4. Refactor the theme code

Answer 3

To begin with, figure out why it slows down (disk, memory, percent, code, locks in the database, extra bots, traffic) and try to eliminate the bottleneck (for example, if there is a lot of free memory and cpu mysql is eating, it makes sense to turn the config towards a more aggressive memory usage). It is possible that one particular page slows down in general and it can be cached for 5-10 minutes into statics by cron. There are many options, but you need to understand what happened.
If there are no hands and a head, then move to cheap ssd virtual machines (if possible, several) with an hourly payment, then move to powerful servers.

Answer 4

of the free ones, the WP Super Cache plugin is good; of the paid ones, take rocket - an order of magnitude better and easier.
if not from the Russian Federation, then CloudFire - 37% compresses traffic for me.
Also, install a profiler plugin, cut off "gluttonous" plugins, i.e. minimize the number of queries to the database.