TO BEANNOUNCED

The Day afterPRODUCTION

@lucamaraschi

❤ !

I LOVE CORE DUMPS!

do epic shit!

"Production is WAR"— Bryan Cantrill

3 storiesof real production war

at scale!

ya…we faced all 3!

“Poor is the pupil who does not surpass his

master.”— Leonardo da Vinci

1.Walmart

The ’handleScope’ Saga

handleScopekeeps track of the objects on stack

150MB leak per day!

down to 22…

but still too muchfor the volume of Walmart!

3 months of debugging…

mdb…or suffer!

and Dtrace…or die!

Yep…and our workerswere leaking too! ;-)

Thank you Walmart!

✔

2.Netflix

Node.js in ’Flames’

v8 perf_events

Flame graphs

and…

Route handlers storedin 1 global array

Express.js recursively iterates and invokes

all handlersuntil it finds the right one!

next();

function next(err) { if (err && err === 'route') { return done(); }

var layer = stack[idx++]; if (!layer) { return done(err); }

if (layer.method && layer.method !== method) { return next(err); }

if (err) { layer.handle_error(err, req, res, next); } else { layer.handle_request(req, res, next); } }

the answeris…

Restify

First class residentTraceability

but how?

Bunyan

Dtrace probesor die!

Thank u Netflix!and chill…

✔

3.Joyent

PostgreSQL autovacuum

github.com/joyent/pglockanalyze

Thank you Joyent!

in progress…

actually…I just heard…

quote_literal()vs.

quote_ident()

wrong quote===

∞ LOOP

ProductionOperability

?

Traceability

Post-mortem

github.com/nodejs/tracing-wggithub.com/nodejs/post-mortem

--abort-on-uncaught-exception

what’s next?

post-mortem analysiscross platform!

mdb likeeverywhere!

github.com/indutny/llnode@indutny

Community drivenenterprise effort

“One reason I think debugging is so hard: you need to know much more about how computers work to debug than you do to

program.”Dave Pacheco(Twitter - 18 August 2015)

Thank you all!do u like Epic Shit?

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