Questions tagged [mongodb-4.2]

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MongoDb write performance degradation when increasing the number of concurrent writers

I was testing MongoDb write performance and noticed the following behaviour: when I increase the number of concurrent writers, the average time needed to write a document increases as well and ...
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29 views

MongoDB - Replication Oplog Window has gone below 1 hours

I'm working with MongoDB Atlas and I have a cluster of 3 with M30 and 100gb of storage. My current usecase is the following: - An user dispatches one search in my platform - The platform dispatches ...
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Remove all Node Descendants when remove Node parent in MongoDB

I have data in MongoDB as Tree Structures model. Here is my data: use TreeMongoParent; db.categoriesPCO.insert({_id:"Electronics",parent:null}); db.categoriesPCO.insert({_id:"Cameras_and_Photography",...
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1answer
6 views

Mongo assigning user permsions issue on docker

I'm using docker image mongo and I extend it to create a user and assign permissions on image build with such a line COPY init.sh /docker-entrypoint-initdb.d/ Here is the init.sh: #!/bin/bash set -e;...
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46 views

Mongo slow startup after upgrade to 4.2.5

I have upgraded the MongoDB replica set, which consists of 3 members, from 4.0.11 to 4.2.5. After upgrading, startup lasts about 5 minutes. Before upgrading it was instant. It is related to ...
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11 views

MongoDB 4.2 Compact command not reclaiming space

In a replica set structure of 1.6 TB each node, we have deleted 400 GB of data out of 1.5 TB of consumed space. We ran compact command on secondary after making it standalone. But db size is not ...
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47 views

mongorestore - documents fail validation

The similar question already have been asked: How to validate a mongorestore But how to actually validate the documents in mongodumb and mongorestore? And also - can I see the documents that fail ...
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2answers
5k views

Failed to start of service MongoDB community4.2 using Homebrew in Mac OS Mojave 10.14

Error message while starting the mongoDB service. Error: Permission denied @ rb_sysopen - /Users/syedahmed/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist I installed/reinstall the ...
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221 views

MongoDB 4.2 using change streams with read concern majority disabled in a PSA deployment

I currently run a PSA (Primary, Secondary, Arbiter) deployment and thous only have two databearing nodes. In case of a databearing node going down, read concern majority prevented the change stream to ...