How to update the CPU core and Driver Memory

1.  Login to VM via zetaris user or switch to zetaris user after login.

   sudo su - zetaris

   
2. Stop the Lightning server using:

   1. sudo service lightning-server stop

       

      
3. Go to path 

   1. cd /home/zetaris/.environment

      
4. Open the file server_env

   1.  vi server_env

5. For a VM with 16 GB RAM ,update ZSPARK_DRIVER_CORES to 4 and  ZSPARK_DRIVER_MEM to 10GB. As shown below
    <The below values should be based on the selected VM size. It is recommended to consult Zetaris before making any changes to these values. The SPARK_DRIVER_MEM and SPARK_EXECUTOR_MEM can be configured up to (Available RAM -8GB) >

ZSPARK_DRIVER_CORES=4. 

ZSPARK_DRIVER_MEM=10g 

 

. Save the file using the below command

!wq

 

6.  Start the Lightning server and check status using:

1. 1. sudo service lightning-server start
   2. sudo service lightning-server status