Python: 100 connections to MongoDB cause a high cpu usage, Why?

Question

MongoEngine support connect to multi mongodb databases.

I write this simple code that make 100 connections to mongodb from python script

But, I noticed in the top , Python cause a very high CPU usage

My CPU:

Why this ?

And If i wanna connect to multi mongodb database in python, How to do it correctly ?

Answer 1

I wrote an equivalent script using pymongo, and the DB CPU usage stayed at 0 even with 300+ connections open.

from pymongo import MongoClient

for x in xrange(100):
    MongoClient()

Try it out and see if the problem persists? I believe that it's the officially supported Python package for MongoDB.