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Why MongoDB CPU usage is high?
Often bad MongoDB server settings cause high CPU usage which reduces the server performance. Additionally, this would make the MongoDB log file grow up to a large size. And, as MongoDB server processes these big log files, eventually all database tasks will get delayed.
Is MongoDB CPU intensive?
According to docker container statistics, my mongo database consumes constantly between 250 and 350% cpu. That’s pretty impressive since it’s a single core system :P. I tried to do a mongotop but it tells me 0ms stats for all shown collections. …
Is MongoDB Atlas slow?
When applications based on MongoDB Atlas grow, queries inevitably slow down. And, as applications become more popular, they typically require fine tuning to improve their performance.
What happens when MongoDB is 100% CPU load?
It will return a list of operations in progress that take more than 3 seconds to perform. If your CPU load is 100% — it’s a good filter to use. You can play with different values, sometimes your requests can take up to 10 secs or even more, so use different values to minimise the output and find that single ‘bad query’.
Why are my MongoDB queries taking so long?
It can happen when somebody (or you) run ‘find’ queries against MongoDB instance and these queries take some long amount of time to finish. We also call it “slow queries”.
How to troubleshoot 100% CPU load and slow queries?
You can go to MongoDB console, run this function and analise the output, but I recommend to start with a filter (secs_running) to reduce the output, e.g: db.currentOp ({“secs_running”: {$gte: 3}}) It will return a list of operations in progress that take more than 3 seconds to perform.
How does the database profiler work in MongoDB?
The database profiler collects fine grained data about MongoDB queries longer than the specific threshold — threshold in milliseconds at which the database profiler considers a query slow. The database profiler writes all the data it collects to the system.profile collection so you can analyze them later.