Runbook

MongoDB Deadlock Issues

Overview

MongoDB Deadlock Issues typically occur when two or more database operations are waiting for each other to release a resource, resulting in a situation where none of the operations can proceed. This can cause the database to freeze or become unresponsive, leading to downtime or degraded performance for applications that rely on it. Deadlocks can occur due to a variety of factors, including inefficient queries, poor database design, and high levels of concurrency. Resolving MongoDB deadlock issues requires careful analysis and tuning of the database configuration and application code to minimize contention and ensure efficient resource utilization.

Parameters

Debug

Check running processes and their resource usage

Check MongoDB logs for any error messages

Check MongoDB server status

Check MongoDB database and collection statistics

Check MongoDB indexes

Check the output of the current operation in MongoDB

Check if there are any locks on the MongoDB database or collection

Check if there are any blocked or waiting operations in MongoDB

Check if there are any active transactions in MongoDB

Check if there are any slow queries in MongoDB

Repair

Tune the MongoDB server parameters, such as the lock timeout and the maximum number of connections, to improve its performance and avoid deadlocks.

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Related Runbooks

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