How to restore cache after jira restart

[Cyber BBH]

We restart our Jira instance during weekend. After each restart we see huge performance drop for  transitioning Jiras on Monday. (Around 3 to 4 hrs)

Once it is completed on Monday, rest of the week we see same task gets completed in 15 mins 

Below is the screen shot for same.

 It seems there is a cache getting deleted on each restart. 

Is it possible to prevent deleting the cache upon server restart?

[Nic Brough -Adaptavist-]

There's no way to do this.

The whole point of a cache is that it caches things that the system is seeing being used a lot, so that the system does not have to go back to (slower) storage to get something for a user.

And hence, restarting a service, by definition, clears its caches.   

The best answer we can give you is "stop restarting the service"

Why are you restarting every week?  Would it not be better to debug the thing that makes you think you need to restart?