Thursday September 28, 2023

Issue summary:
From 8:00 AM PDT to 11:00 AM PDT on Thursday, September 28, 2023, a small number of users experienced delays in Slack, including sending and editing messages, and loading channels.

Upon investigation, we determined that a specific task in our backend was producing too many file deletion events and overloading our servers, resulting in these delays.

We implemented a fix to reduce the load on our servers and this resolved the issue for all affected users.

5:49 PM PST

We resolved the latency issues with Slack. Impacted actions like sending or editing messages have been restored. We appreciate you bearing with us as we worked to get things back to normal.

11:28 AM PST

Some users may be seeing signs of improvement, but we’re still monitoring the situation. We’ll be back once we have another update to share. Thank you for your patience as we sort this out.

11:27 AM PST

We have determined that less than 1% of API calls are failing.

As this may impact certain actions like sending or editing messages, we recommend that users reattempt the action if it has failed. We hope to resolve this shortly and will be back with an update once new information becomes available.

10:23 AM PST

A small number of users are reporting latency with Slack, including delays in sending or editing messages.

We're investigating the issue and will share an update once we have more information.

10:02 AM PST