1. Pls, ensure that lower performance server was used in setup wizard.
2. Pls, disable separate cache for mobiles if layout is responsive (by running setup wizard).
3. If it not enough, images compression and images adaptation can be disabled.
4. Please, ensure that self-learning is enabled:
5. Further, CPU cooldown can be adjusted like this:
6. If the above steps are not enough, all automatic optimizations can be turned off:
7. 'internal requests' can be enabled as well to free web server resources as well:
8. Simple thread of optimization can be enabled as well:
Also, please, clear processing queue: https://www.s-sols.com/docs/wordpress/accelerator/status-and-operations-accel#queue.
Finally, if above steps don't help, hosting plan should be upgraded.