This section includes various troubleshooting tips and tricks for Redis Enterprise Software.
If you encounter any issues that you are not able to resolve yourself and need to contact Redis support for assistance, you can create a support package that gathers all essential information to help us debug your issues. Note: The process of creating the support package can take several minutes and generates load on the system. Creating a support package To create a support package: Click Support at the top right of the admin console.
Because data is being moved around across shards during the resharding process, it is impossible to report the values of some of the metrics in an accurate manner. Therefore, several database metrics are not collected, and as a result, the graph is blank when you view the database or shard metrics. Examples of metrics that are not collected during the resharding process are: Used memory Memory usage Total keys Write misses/sec Read misses/sec Expired objects/sec Evicted objects/sec Incoming traffic Outgoing traffic
The Redis Enterprise Software cluster nodes host a range of services that support the cluster processes. In most deployments, either all of these services are required, or there are enough memory resources on the nodes for the database requirements. In a deployment with limited memory resources, certain services can be disabled from API endpoint to free system memory or using the rladmin command. Before you disable a service, make sure that your deployment does not depend on that service.
Nodes in the same cluster must reside on the same VLAN. If you cannot host the nodes on the same VLAN then you must configure all ports between them to be open.
How to use the cluster configuration file and database data to recover a failed cluster.
Problem: The Replica Of process repeatedly fails and restarts Diagnostic: A log entry in the Redis log of the source database shows repeated failures and restarts. Cause: The Redis “client-output-buffer-limit” setting on the source database is configured to a relatively small value, which causes the connection drop. Resolution: Reconfigure the buffer on the source database to a bigger value: If the source is a Redis database on a Redis Enterprise Software cluster, increase the replica buffer size of the source database with: