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authorErik Johnston <erik@matrix.org>2018-10-29 17:34:34 +0000
committerErik Johnston <erik@matrix.org>2018-10-29 17:34:34 +0000
commit88e5ffe6fe816e54a5471728e93fde63353d9a70 (patch)
tree1a0c1eaf976ee3316f213e7c3948c3df09384c01 /synapse/_scripts
parentDon't truncate command name in metrics (diff)
downloadsynapse-88e5ffe6fe816e54a5471728e93fde63353d9a70.tar.xz
Deduplicate device updates sent over replication
We currently send several kHz of device list updates over replication
occisonally, which often causes the replications streams to lag and then
get dropped.

A lot of those updates will actually be duplicates, since we don't send
e.g. device_ids across replication, so let's deduplicate it when we pull
them out of the database.
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