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31 e melhor

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Guest over 5 years ago in Database 2 Submitted

Too many keys in 2dsphere index when used on geoJson within arrays

Mongo support have asked me to raise this bug as an improvement idea because they see it as an edge case. The issue is here and includes more details: https://support.mongodb.com/case/00659614 In summary, if you have a geoJson sub document that ...

Guest over 5 years ago in Database 0 Submitted

2 VOTE

Performance problem with compound index using doubles, with range filtering

It looks like there may be a problem when using doubles in a compound index and using range-test filters against all of them in a query. The problem we see from the explain plans is that far more keys are being examined that there should be and th...

Guest over 5 years ago in Database 0 Submitted

1 VOTE

Combine reshardCollection+mongosynd idea to support a remote collection on a separate new cluster

Great for prod productivity and 99.999 SLA if mongo could support this, for example, Given "mydb.mycoll" in current cluster being sharded with {zip:1} shard key 1/ New cluster: sh.shardCollection( "mydb.mycoll", {name:1, phone:1} ) 2/ "Mongocopy...

Guest over 2 years ago in Database 0 Submitted

2 VOTE

Making Elections Faster.

Election is an expensive operation. We can avoid the elections if we can enforce some priority-based ordering on who shall become primary if the current primary fails. Specifically, we can keep a node with second highest priority in the data cente...

Guest over 5 years ago in Database 0 Submitted

1 VOTE

throttle sessions which use too much resources

We have different types of applications : 1. Writer - to load data into mongodb from different data sources 2. Reader - to read data and display to end user. Normally, there is strict SLA for reader , but no SLA (or less restricted) for writers. ...

Guest over 2 years ago in Database 0 Submitted

1 VOTE

Add hash function (eg. md5) to aggregation pipeline

I would like to implement hash-based sharding in my own application on top of MongoDB. For that purpose, I would like to pull a stable pseudorandom subset of documents into each of my servers, and I would like to do so without enlarging the docume...

Guest over 2 years ago in Database 0 Submitted

1 VOTE

Improve sorting performance

Sorting always ends up doing a collection scan when the selected index for the find/match does meet the sort requirement. The sort effectively makes the performance worse by 15-25 times for the "matched" dataset which runs into 10s of thousands (n...

Guest almost 3 years ago in Database 0 Submitted

1 VOTE

$currentDate option to only update if the document was modified

A common pattern in a data model is to have a field that denotes when the data was last modified. For this example, let this field be called "updated". I want to toggle a field on a document called "enabled", and if the value is modified I also wa...

Guest almost 3 years ago in Database 0 Submitted

1 VOTE

Build MongoDB with PGO

I would like to see support for PGO (and even LLVM Bolt) in the upstream. Would be awesome if MongoDB will distribute PGO-optimized binaries, so the users will be able to see an additional performance boost "for free". At least describe to the use...

Guest almost 3 years ago in Database 1 Submitted

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