rantav

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

baniol

Maintaining even a small mongodb application in production requires regular backups of remotely stored data. MongoDB gives you three ways to acomplish it. In this post I'm using monogodump command for creating a backup and mongorestore for recreating the data. The purpose of this writing is to provide a simple way of periodic database dumps from a remote server to a Dropbox cloud storage.

Remember that for using mongodump you have to have a mongod process running.

Dumping a database

Suppose that you want make a backup of your books database.

To create a dump use mongodump -d books -o which will result in a book folder containing bson files with all collections.