How do I make an existing issue a child in Agile?

[Deleted user]

We often have tickets (Stories, Tasks) that we need to retroactively add to an Epic in Agile.

I can link it (blocked by, etc.) but those don't show as Child items and hence don't work on the Agile board.

Anyone know how to do this?

[Nic Brough -Adaptavist-]

If the CPU is under-used during an intense process such as indexing, then it's waiting for other things.

Take a look at the disk IO and the database IO - I think you'll find the CPU is waiting on one of them.