How can I set the Xmx of confluence7.10.0 correctly so that the access will not be slow occasionally

[PPGod]

[Nic Brough _Adaptavist_]

There's no way for us to know what the right maximum memory setting is for your system. 

If you are suffering performance issues, you need to analyse them to identify where and what they are.  Maximum memory allocation is only one of hundreds of potential causes.

[PPGod]

[Nic Brough _Adaptavist_]

I am not sure why you have posted that, or what you expect in response.

If you are suffering performance issues, you need to analyse them to identify where and what they are.