[anti-censorship-team] Spike in client polls from Snowflake broker metrics

[Cecylia Bocovich]

I was alerted by trinity-1686a on irc that Snowflake standalone proxy 
operators were reporting on #tor-relays about increased OOM errors from 
increased load as of 2023-08-28.

After looking at the Snowfake broker metrics[0], there's a huge jump in 
client polls (seen by summing the client-denied-count and 
client-snowflake-match-count).

I've attached a graph of the collected prometheus metrics that shows 
this spike happening at exactly 17:40 UTC on 2023-08-27. It looks like 
way too sharp an increase to me to be a censorship event, perhaps it is 
a DoS?

It's still too early to see the bridge metrics from the metrics page, 
but we should start to see the effects there tomorrow.

[0] https://metrics.torproject.org/collector.html#snowflake-stats
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Screenshot from 2023-08-30 14-21-28.png
Type: image/png
Size: 129899 bytes
Desc: not available
URL: <http://lists.torproject.org/pipermail/anti-censorship-team/attachments/20230830/f6b94447/attachment-0001.png>