Facebook hit git performance issue on large repository

Re:Facebook hit git performance issue on large repository by loeg on Friday February 03, 2012 @05:18PM (#3549334)

I'm curious what their performance numbers look like if they host the .git repo on tmpfs -- 15GB isn't unreasonable on a beefy (24-32GB of ram) machine.

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Re:Facebook hit git performance issue on large repository by wmf on Friday February 03, 2012 @05:46PM (#3549434)

Probably the same as the warm cache results, since that's basically what tmpfs is. I wonder if git does all that stat()ing serially or in parallel, though...

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Re:Facebook hit git performance issue on large repository by durin42 on Friday February 03, 2012 @06:44PM (#3549614)

I don't have the link handy, but IIRC we did some experiments with that for Mercurial and found that stat() in parallel didn't really help much until you were using NFS or similarly slow network-type latency filesystems.

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Re:Facebook hit git performance issue on large repository by patangay on Saturday February 04, 2012 @05:15AM (#3550750)

For what it's worth, Josh has been doing all his tests on machine with SSDs and 72GB of RAM.

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