Exports frequently fail due to polling limits

[macobo]

In what situation are you experiencing subpar performance?

We've had user reports that exports keep failing due to user timeouts.

I've witnessed this myself trying to export csv data from user modals in funnels.

We should dig into this and figure out what's going wrong and make sure we have appropriate metrics in place.

Environment

• [x] PostHog Cloud
• [ ] self-hosted PostHog, version/commit: please provide

Additional context

cc @benjackwhite as feature starter

Thank you for your performance issue report – we want PostHog to go supersonic!

[pauldambra]

There are some metrics here https://metrics.posthog.net/d/jMdv69qnk/exports?orgId=1&from=now-7d&to=now

We do see CSV exports "succeeding" in Celery long after the UI has reported the export has failed.

[Twixes]

Solved, now that we have an Exports side panel in the UI.