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hperantunes/m102-hw3.2.md

Created August 23, 2015 21:03
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m102-hw3.2.md

HOMEWORK: HOMEWORK 3.2

In a mongo shell run homework.b(). This will run in an infinite loop printing some output as it runs various statements against the server.

We'll now imagine that on this system a user has complained of slowness and we suspect there is a slow operation running. Find the slow operation and terminate it.

In order to do this, you'll want to open a second window (or tab) and there, run a second instance of the mongo shell, with something like:

$ mongo --shell localhost/performance performance.js

Keep the other shell with homework.b() going while this is happening. Once you have eliminated the slow operation, run (on your second tab):

homework.c()

and enter the output below. Once you have it right and are ready to move on, ctrl-c (terminate) the shell that is still running the homework.b() function.

db.currentOp()
db.killOp(35)
homework.c()
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