MongoDb

Install mongodb on mac

brew uninstall mongodb mongodb@3.2 mongodb@3.4 || true
brew install mongodb@3.6
brew unlink mongodb && brew link --force --overwrite mongodb@3.6
brew services restart mongodb@3.6
rm ~/Library/LaunchAgents/*mongodb*
ln -sfv /usr/local/Cellar/mongodb@3.6/*/*.plist ~/Library/LaunchAgents

Get around mac max file limit

run

sudo launchctl limit maxfiles 1000000 1000000

Then add line below to ~/.bash_profile

ulimit -n 65536 65536

Search by timestamp

search from a certain timestamp

db.getCollection('XXX').find({t: {$gte: new ISODate("2018-01-01T21:56:47Z")}});

search last 5 minutes

db.getCollection('XXX').find({t: {$gte: new Date(ISODate().getTime() - 1000 * 60 * 5)}})