Memcached extension
- Latest Dynatrace
- Extension
- Published Oct 27, 2025
Get insight on your distributed caching system.
Get started
Overview
Monitor Memcached servers to detect database issues and optimize cache performance.
Memchaced is a distributed caching system used to speed up dynamic database-driven websites. Dynatrace Memcached server monitoring provides insights into your distributed memory-object caching system so that you can pinpoint server performance issues and identify potential bottlenecks.
Compatibility information
- Dynatrace OneAgent version 1.265+
- Memcached Server 1.4.24+
- Dynatrace supports TCP UDP and socket connections to Memcached servers. Admin permissions are required for socket connection types 666 or higher.
Activation and setup
- Go to Hub.
- Find Memcached and select Add to environment.
- Create a configuration. No parameters are needed, just activate it and you're ready to go.
We recommend enabling the extension only on the hosts where memcached is actually running.
Feature sets
When activating your extension using monitoring configuration, you can limit monitoring to one of the feature sets. To work properly the extension has to collect at least one metric after the activation.
In highly segmented networks, feature sets can reflect the segments of your environment. Then, when you create a monitoring configuration, you can select a feature set and a corresponding ActiveGate group that can connect to this particular segment.
All metrics that aren't categorized into any feature set are considered to be the default and are always reported.
A metric inherits the feature set of a subgroup, which in turn inherits the feature set of a group. Also, the feature set defined on the metric level overrides the feature set defined on the subgroup level, which in turn overrides the feature set defined on the group level.
| Metric name | Metric key | Description |
|---|---|---|
| Log worker dropped | memcached.log_worker_dropped.count | — |
| Log worker written | memcached.log_worker_written.count | — |
| Log watcher skipped | memcached.log_watcher_skipped.count | — |
| Log watcher sent | memcached.log_watcher_sent.count | — |
| Metric name | Metric key | Description |
|---|---|---|
| Read throughput | memcached.bytes_read.count | — |
| Write throughput | memcached.bytes_written.count | — |
| Metric name | Metric key | Description |
|---|---|---|
| Memory max bytes | memcached.limit_maxbytes | — |
| Memory bytes | memcached.bytes | — |
| Memory evictions | memcached.evictions.count | — |
| Malloc fails | memcached.malloc_fails.count | — |
| Memory reclaims | memcached.reclaimed.count | — |
| Metric name | Metric key | Description |
|---|---|---|
| Get commands | memcached.cmd_get.count | — |
| Set commands | memcached.cmd_set.count | — |
| Get hits | memcached.get_hits.count | — |
| Get misses | memcached.get_misses.count | — |
| Metric name | Metric key | Description |
|---|---|---|
| Threads | memcached.threads | — |
| Metric name | Metric key | Description |
|---|---|---|
| Uptime | memcached.uptime | — |
| Metric name | Metric key | Description |
|---|---|---|
| Connections | memcached.curr_connections | — |
| Rejected connections | memcached.rejected_connections.count | — |
