What happens when MongoDB uses a lot of CPU?
When there is a heavy CPU usage by MongoDB, it can often result in tardy website applications. The performance will be high when the MongoDB use less CPU. However, it will create a very slow and undesirable user experience within the online applications when MongoDB uses high CPU.
What to do If MongoDB doesn’t return results?
If db.currentOp () doesn’t return any results, because there is no query which went havoc, then there’s also db.setProfilingLevel () which will enable profiling by storing queries into the “local” database. Here ‘s a “Tutorial” which is from the “M102: MongoDB for DBAs” Course.
How to kill a query in MongoDB stack?
You can then use the currentOp.opid with db.killOp () to kill that query/operation. If db.currentOp () doesn’t return any results, because there is no query which went havoc, then there’s also db.setProfilingLevel () which will enable profiling by storing queries into the “local” database.
What does I / O mean on MongoDB data partition?
Disk I/O % utilization on Data Partition occurs if the percentage of time during which requests are being issued to any partition that contains the MongoDB collection data meets or exceeds the threshold.
How are disk IOPS used in MongoDB Atlas?
The disk IOPS use from the Disk IOPS graph in the cluster metrics exceeds the provisioned IOPS from the Atlas cluster configuration page. The Normalized System CPU metric has a high IOWait curve.
Where is the iowait curve on MongoDB Atlas?
The Normalized System CPU metric has a high IOWait curve. IOWait measures the percentage of time the CPU is idle and waiting for an I/O operation to complete. The Normalized System CPU chart is located under the Hardware Metrics section of the Metrics tab.
What does slowopsamplerate do in MongoDB profiler?
See Profiler Overhead for more information on potential performance degradation. When logLevel is set to 0, MongoDB records slow operations to the diagnostic log at a rate determined by slowOpSampleRate.
Which is full time diagnostic data collection mechanism in MongoDB?
To facilitate analysis of the MongoDB server behavior by MongoDB Inc. engineers, mongod and mongos processes include a Full Time Diagnostic Data Collection (FTDC) mechanism. FTDC data files are compressed, are not human-readable, and inherit the same file access permissions as the MongoDB data files.