What should be the correct value for "global_allocation_limit" ?

[jsupwork000]

1. Currently host has  “global_allocation_limit” is set to 0 .

2. For the host

    DB Allocated Memory is 361.98 GB (as per screenshot below) vs

    Licensed Memory is 245 GB 

    Total Physical Memory on the host is 377.89 GB

3 Current Memory allocation for SAP Hana Production System is below as per below screenshots.

BECAUSE, Current DB Allocated Memory  (361.98 GB) which is lot higher than Licensed Memory is (245 GB) seeing random errors like "Cache Refresh Failure" & "No DB to sign".

What should be the correct value for "global_allocation_limit" ?

This is our production and critical system so your input & feedback is greatly appreciated. 

Happy to share more details in case if you need.

Thanks in advance for your time and feedback !

JS.