mongodb: how can I see the execution time for the aggregate command?

var before = new Date()
#aggregation query
var after = new Date()
execution_mills = after - before

Or you can install the excellent mongo-hacker, which automatically times every query, pretty()fies it, colorizes the output, sorts the keys, and more:

enter image description here


You can add a time function to your .mongorc.js file (in your home directory):

function time(command) {
    const t1 = new Date();
    const result = command();
    const t2 = new Date();
    print("time: " + (t2 - t1) + "ms");
    return result; 
}

and then you can use it like so:

time(() => db.coll.aggregate(...))

Caution

This method doesn't give relevant results for db.collection.find()


i see that in mongodb there is a possibility to use this two command:

  • db.setProfilingLevel(2)

  • and so after the query you can use db.system.profile.find() to see the query execution time and other

Tags:

Mongodb

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