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    <p>It does only use one connection, if you use the default method where you do mongoose.connect(). To get around this, you can create multiple connections, and then tie a model pointing to the same schema to that connection.</p> <p>Like so:</p> <pre><code>var conn = mongoose.createConnection('mongodb://localhost/test'); var conn2 = mongoose.createConnection('mongodb://localhost/test'); var model1 = conn.model('Model', Schema); var model2 = conn2.model('Model', Schema); model1.find({long query}, function() { console.log("this will print out last"); }); model2.find({short query}, function() { console.log("this will print out first"); }); </code></pre> <p>Hope that helps.</p> <p><strong>Update</strong> Hey, that does work. Updating from the comments, you can create a connection pool using createConnection. It lets you do multiple queries from the same model concurrently:</p> <pre><code>var conn = mongoose.createConnection('mongodb://localhost/test', {server:{poolSize:2}}); var model = conn.model('Model', Schema); model.find({long query}, function() { console.log("this will print out last"); }); model.find({short query}, function() { console.log("this will print out first"); }); </code></pre> <p><strong>Update 2 -- Dec 2012</strong><br> This answer may be slightly outdated now--I noticed I've been continuing to get upvotes, so I thought I would update it. The mongodb-native driver that mongoose wraps now has a default connection pool size of 5, so you probably don't need to explicitly specify it in mongoose.</p>
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    1. COI understand it uses only one connection, but what happens when I use just one connection and a mongodb query immediately follows another heavy mongodb query? Will the first query I mention wait until the second query I mention finishes its work on mongodb?
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    2. COAha, I guess you're telling me it will wait, and hence I should use a different model. I see, thanks.
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    3. COYep. If you try it with just one connection, they will print in the order queried.
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