element-hq / element-hq/synapse
`DELETE /_synapse/admin/v1/rooms/<roomId>` eats lots of CPU
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T-Defect
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- Python
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Description
This issue has been migrated from [#16486](https://github.com/matrix-org/synapse/issues/16486).
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shutting down a big room with `DELETE /_synapse/admin/v1/rooms/` takes hours and chews CPU while it does it.
I think it's creating all the `leave` events (which we do so that we can send them on to clients).
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