CODEWITHSUNDEEP
node.jsmongodbmongooseaggregation-framework
Dan Steele
Dan Steele

Reputation: 315

Is there any way to supply the allowDiskUse option to an mongoose.js aggregation?

I'm running an aggregation on a collection of around 300k+ records which requires several unwinds and regroups. I'm hitting the following error;

'exception: Exceeded memory limit for $group, but didn\'t allow external sort. Pass allowDiskUse:true to opt in.'

I can't seem to work out how to pass this option through using the mongoose.js API?

Upvotes: 20

Views: 16952

Answers (4)

Chetan Gupta
Chetan Gupta

Reputation: 152

const data = await Model.aggregate([..]).option({ allowDiskUse: true }).explain();

Source - Mongoose explain API

Upvotes: 0

dc7
dc7

Reputation: 418

const agg = Model.aggregate(..).option({ allowDiskUse: true });

worked for me as per the Mongoose V6.0.4 documentation here

Upvotes: 3

glowry
glowry

Reputation: 369

Model.aggregate(..).allowDiskUse(true).exec(callback)

mongoose api

Upvotes: 24

Valeri Karpov
Valeri Karpov

Reputation: 246

We don't have a helper for this right now, but an allowDiskUse() helper function will be included in Mongoose 3.8.12, which I'll ship today: https://github.com/LearnBoost/mongoose/issues/2114

If you want an immediate solution or don't want to upgrade to 3.8.12 (although upgrading is recommended), you can do something like:

var aggregation = MyModel.aggregate(...); 
aggregation.options = { allowDiskUse: true }; 
aggregation.exec(function() {});

Upvotes: 23

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