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Troubleshooting Performance around a Data Purge Process

Andy Mallon troubleshoots an issue:

In January, one of our Staff Engineers sent the following message to the DBRE help channel in Slack:

Morning folks, we had a pretty significant wait spike on the [database]. Circuit breakers closed and reopened quickly. Is anyone immediately aware of a reason why this could’ve happened?

Read on for Andy’s quick analysis and then the root cause and solution.