Crash-free rate is not a health check
Session-rate charts move when traffic mix moves. Treating them as a vital sign is how launch reviews turn into weather reports.
Journal
Desk notes, not vendor recaps.
Short essays from faculty and guests. We write when a cohort keeps tripping on the same chart. Nothing here is a product announcement.
Symbolication delay distorts priority
Unsymbolicated frames invent “new” crashes on release day. A 36-hour freeze on P0s saves more sleep than another dashboard tile.
Grouping crashes without erasing users
Vendor merge rules optimise for a tidy inbox. Users do not live in tidy inboxes. Here is how we split stacks without multiplying noise.
When stability alerts should wait
Paging on every vitals nudge trains people to ignore the one that matters. A quieter rule set from a ride-hailing night shift.