element-hq / element-hq/synapse
Deleting devices is *incredibly* resource-hungry
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A-Device-List-Tracking
A-Performance
T-Defect
- Dominant language
- Python
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Description
This issue has been migrated from [#2704](https://github.com/matrix-org/synapse/issues/2704).
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Last night a user tried to delete a few hundred devices. This caused a significant increase in CPU usage, both on the main synapse and synchrotrons. Replication essentially stopped working and the whole system had to be restarted
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