Velocity 09: Chris Bissell, Jeremy Custenborder, and Yadid
summary
MySpace runs on ~10,000 servers and the team finds three concrete failure modes: a regex that inserts <wbr> into long no‑space comments causes massive string reallocations and runaway GC; a Flash ad spikes browser CPU/memory and produces a 15% drop in logins; farm‑wide request queuing comes from IO‑saturated threadpools. They build operational tools — perf collector, perf graphs, a stack dump tool, and a nightly perf tracker build plugin that records client and server metrics and flags surprising deltas.
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chapters (15)
- 0:00Start
- 16:42Tools
- 16:523 Real-world problems
- 21:55Problem 1
- 24:50Distributed Diagnosis
- 25:06Single Server Diagnosis
- 26:17CPU/Memory Spikes : Investigation
- 26:30Regular Expressions
- 27:53Chris Crocker
- 29:35Login count is dropping
- 33:23Problem 2: Rollup
- 34:27Not a pretty picture
- 34:37Interesting Tidbits
- 36:24Problem 3: Rollup
- 38:33Perf Tracker Architecture
