my site is very slow when it has a certain number of users online, for example 5,000 users online it is slow and takes a long time to load, how to solve?
this is my origin server
Processing: 2 VCPU
Memory: 4 GB
Storage: 50 GB
Connectivity: 100 Mbps; 1000 GB monthly deductible
Operational system: CentOS 7.7, 64 bits