Getting our self-hosted instance setup and getting this error on one of the queries. What does it mean and how do we address it?

VM: Linux (ubuntu 18.04)
vCPUs: 2
RAM: 4 GiB

Try increasing the RAM on your machine. It sounds like the worker crashed because it ran out of memory.

That seems to have been the cause. Thanks!

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I have another query returning this same error. But, now I have the following:

VM: Linux (ubuntu 18.04)
vCPUs: 4
RAM: 16 GiB
Max IOPS: 6400

Any other suggestions?

How much RAM have you allocated for your docker containers? Do you see anything in your logs?