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synapse-old/changelog.d/7861.misc

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Optimise queueing of inbound replication commands (#7861) When we get behind on replication, we tend to stack up background processes behind a linearizer. Bg processes are heavy (particularly with respect to prometheus metrics) and linearizers aren't terribly efficient once the queue gets long either. A better approach is to maintain a queue of requests to be processed, and nominate a single process to work its way through the queue. Fixes: #7444
2020-07-16 08:49:37 -06:00
Optimise queueing of inbound replication commands.