Resource usage metrics
Connections
Number of connections to the database.
Components measured: Cluster, Node, and Database
CPU usage
Percent of the node CPU used.
Components measured: Cluster and Node
Main thread CPU usage
Percent of the CPU used by the main thread.
Components measured: Database and Shard
Fork CPU usage
CPU usage of Redis child forks.
Components measured: Database and Shard
Total CPU usage
Percent usage of the CPU for all nodes.
Components measured: Database
Free disk space
Remaining unused disk space.
Components measured: Cluster and Node
Memory
Used memory
Total memory used by the database, including RAM, Flash (if enabled), and replication (if enabled).
Used memory does not include:
- Fragmentation overhead - The ratio of memory seen by the operating system to memory allocated by Redis
- Replication buffers at the primary nodes - Set to 10% of used memory and is between 64 MB and 2048 MB
- Memory used by Lua scripts - Does not exceed 1 MB
- Copy on Write (COW) operation that can be triggered by:
- A full replication process
- A database snapshot process
- AOF rewrite process
Used memory is not measured during shard migration.
Components measured: Database and Shard
Free RAM
Available RAM for System use.
Components measured: Cluster and Node
Memory limit
Memory size limit of the database, enforced on the used memory.
Components measured: Database
Memory usage
Percent of memory used by Redis out of the memory limit.
Components measured: Database
Traffic
Incoming traffic
Total incoming traffic to the database in bytes/sec.
All incoming traffic is not measured during shard migration.
Components measured: Cluster, Node and Database
Incoming traffic compressed
Total incoming compressed traffic (in bytes/sec) per Active-Active replica database.
Incoming traffic uncompressed
Total incoming uncompressed traffic (in bytes/sec) per Active-Active replica database.
Outgoing traffic
Total outgoing traffic from the database in bytes per second.
Outgoing traffic is not measured during shard migration.
Components measured: Cluster, Node and Database