Too Many Requests on Bulk Server Notices

[samuel-p]

I tried to send a Server Notice to all the users (~40) of my homeserver, but for more than half of them I get a 429 Too Many Requests as response:

{
	"errcode": "M_LIMIT_EXCEEDED",
	"error": "Too Many Requests",
	"retry_after_ms": 9978
}

Maybe it is possible to not send the requests in parallel and handle the responses to delay the following requests if one gets 429 error.

[samuel-p]

I just found this issue matrix-org/synapse#6286. Maybe this is already a possible solution. If so, I think its useful to mention it somewhere in the docs.

[NeoTheThird]

Maybe it would be possible to implement a batching middleware that ensures only a certain number of requests are sent per time period and requests rejected with 429 are automatically dispatched again at least once after the retry_after_ms has elapsed?

[dklimpel]

You can retry it with Synapse v1.32.0.
Docs: https://github.com/matrix-org/synapse/blob/develop/docs/admin_api/user_admin_api.rst#override-ratelimiting-for-users

[ptman]

https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#override-ratelimiting-for-users