How can I make a custom global variable and store the result of SOQL query in Salesforce?

I am trying to store more than 60,000 record from Batch apex result, and I have to edit the record with schedulable apex every 5 mins.

So,
Can I store this data in a global variable? I googled it, but all I can find was for Normal global variable. Would you be able to direct me to the link or show me a simple code line please?