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A comment on MongoDB's lead developer: Foursquare outage post mortem. Parent comment

Re:MongoDB's lead developer: Foursquare outage post mortem by suhail on Thursday October 07, 2010 @06:53PM (#1769841)
It's okay to have hundreds of terrabytes of data but you need to keep your "working set" hot. Even if you have 10TB of data, 1TB of it might actually be hot.

Monitoring your working set is tough.

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Re:MongoDB's lead developer: Foursquare outage post mortem by ericflo on Thursday October 07, 2010 @07:05PM (#1769866)
Yea, but that doesn't look like what they're describing here. They seem to be describing having the entire dataset in memory.
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Re:MongoDB's lead developer: Foursquare outage post mortem by btilly on Thursday October 07, 2010 @07:07PM (#1769874)
It is easy to turn swap off. There are many reasons why it can be good to turn swap off in servers. (But only if you've got sufficient monitoring to hear about it before you run out of RAM.)
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