bugsink/performance/stress-with-eviction

Some results of a small stress test (event-size: 50KiB) d.d. 27 Jun 2024

15 projects with 10_000 events maximum each.

Most interesting pictures: df and snappea_queue_size

What we can see: there is a backlog this time.

C. 8:00 UTC: Start of stress test C. 9:00 UTC: Per project max event is being hit; disk usage increase slows down. C. 15:00 UTC: I turned off the stress test; from that point the backlog (and hence the disk usage of undigested events) was reduced. C. 16:00 UTC: Backlog reduced to 0

Post-test (next day) db size is 5518716928 (5.2GiB)

Open question: what is causing the increase of disk usage between 9:00 and 16:00 (i.e. between max-hit and test-done). Some options:

• Logs
• DB inefficiencies (no vacuum yet)
• Issues / other items in the DB. Issues seems unlikely TBH: there is some increase in the number of issues (we have random event types, with a long-tail distribution, so new issues may always arise, but after the test there are only 6611 total issues)