MongoDB indexes for nuxeo.audit

For 8.10 LTS sites when using Mongo for audit logs we need some indexes on nuxeo.audit. Altas, for example, recommends the following:

db.audit.createIndex({ 
    docUUID: 1,
    eventId: 1
}, {background: true})

db.audit.createIndex({ 
    eventDate: -1
}, {background: true})

I applied this to one of our sites to see if it improves performance which users have reported.