The Magic Dump
summary
Nighttime production outage on AWS turns into a forensic session using DTrace and MDB on SmartOS; 200 concurrent requests and 1 GB core dumps reveal a handler that accumulates more than a million references to a large payload. The investigation traces V8 objects, finds copied rather than cached data caused by a single bad reference (a one‑character fix), and exposes Bluebird/restify/nginx interaction and GC pressure as the root cause. The talk shows exact tools, numbers, and the fix.
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chapters (4)
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