Redis (2.0)Redis (2.0)
Collect important additional data for your Redis instances.
Extension
- Product information
- Release notes
Overview
Redis is an open-source, in-memory, key-value database (or "data structure server") with optional durability. Redis is commonly used as a database, cache, queue, and message broker (publish and subscribe). Out of the box, Dynatrace monitors the standard Redis process level metrics. Using this extension you can collect additional Redis metrics including response time, memory fragmentation, cache hit ratio, cache usage, number of connections, hits, misses, and more.
Use cases
- Monitor for critical issues such as unsynchronized replicas or synchronization tasks taking longer than expected
- Identify memory related issues such as excessive memory fragmentation or keys being evicted due to memory limits being reached
- Detect if clients are being rejected due to the maxclients limit
- Identify if there is an increasing number of queries exceeding their specified execution times (reported in the slow log)
Compatibility information
Requirements and limitations
- Redis Server 2.8 or higher
- Linux OS
- Redis must listen on localhost. Binding between localhost and the Redis port is required.
Docker support
- Redis docker image version 5.0.0+
Extension content
Content typeNumber of items included
alerts
2
metric metadata
23
screen injections
16
screen chart groups
16
document dashboard
1
dashboards
1
Feature sets
Below is a complete list of the feature sets provided in this version. To ensure a good fit for your needs, individual feature sets can be activated and deactivated by your administrator during configuration.
Feature setsNumber of metrics included
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Keys | redis.keys | The number of keys in the selected database. | Count |
| Expires | redis.expires | The number of keys that have the TTL parameter. | Count |
| Average time-to-live | redis.avg_ttl | The estimated average TTL of keys on the server. | MilliSecond |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Role | redis.role | The role of the Redis instance (e.g. master, slave, or sentinel) | State |
| Responsiveness | redis.responsiveness | The time elapsed while the Redis server responds to INFO requests. Redis typically responds within milliseconds. | MilliSecond |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Slow queries | redis.slowlog_len.count | The number of queries added in the Redis slow log. | Count |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Keyspace hits | redis.keyspace_hits.count | Number of successful key lookups in the main dictionary. | Count |
| Keyspace misses | redis.keyspace_misses.count | Number of failed key lookups. | Count |
| Evicted keys | redis.evicted_keys.count | Number of keys removed from cache to free up memory for new items | Count |
| Expired keys | redis.expired_keys.count | Number of key expiration events. | Count |
| Commands processed | redis.total_commands_processed.count | Number of commands processed by Redis. | Count |
| Cache hit ratio | redis.hit_ratio | The percentage of key lookups in the main dictionary that were successful. | Percent |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Connected clients | redis.connected_clients | Number of client connections (excluding connections from replicas). | Count |
| Blocked clients | redis.blocked_clients | The number of blocked clients | Count |
| Connections received | redis.total_connections_received.count | Number of connections accepted by the server. | Count |
| Rejected connections | redis.rejected_connections.count | The number of connections rejected because of the maxclients limit. | Count |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Used memory | redis.used_memory | The amount of memory in-use | Byte |
| Max memory | redis.maxmemory | The maximum memory allowed in Redis cache. | Byte |
| Memory fragmentation ratio | redis.mem_fragmentation_ratio | The ratio of memory used by the operating system compared to the amount of memory allocated by Redis. | Percent |
| Memory usage | redis.memory_usage | The percentage of utilized Redis memory. This metric is visible only when the Redis maxmemory parameter is configured. | Percent |
| Metric name | Metric key | Description | Unit |
|---|---|---|---|
| Connected replicas | redis.connected_replicas | Number of connected replicas. This metric is visible for the master and those replicas that are connected to other replicas. | Count |
| Last master interaction time | redis.master_last_io_seconds_ago | Time since interaction with the master | Second |
Full version history
To have more information on how to install the downloaded package, please follow the instructions on this page.
ReleaseDate
Full version history
Minimum OneAgent version is 1.314.0
Features
- Support for client-side certificate based authentication
Full version history
Changes
- Improved error handling (Dynatrace Error Codes) and Endpoint Statuses.
Full version history
Minimum Dynatrace version now 1.314!
Changes
- Included platform dashboard
- Metrics displayed for process group instance in Infrastructure & Operations App
Full version history
Features
- TLS/SSL support
- Parsing of redis configuration file to automatically retrieve and use password for default user
Full version history
- Fixes bug that prevented redis.hit_ratio from being reported.
Full version history
- Fix bug in snapshot processing that could prevent some intervals from collecting data
- Correct data type of top-level password to be an encrypted secret
Full version history
- Correct logic in parsing of snapshot file to avoid breaking in some scenarios
Full version history
- detect and handle sentinel processes more cleanly
- attempt to connect without a password if scenario detected where a password was provided but is not needed
Full version history
- Initial 2.0 release
