Memcached

Memcached

Distributed caching system used to speed up dynamic database-driven websites.

Extension

Product information
Release notes

Overview

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.

Get started

Pre-requisites

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.

Start using the Memcached extension by clicking on Add to environment and creating a configuration. No parameters are needed for the configuration, just activate it and you're ready to go. We recommend enabling the extension only on the hosts where memcached is actually running.

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.

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Extension content

Content typeNumber of items included

metric query

1

screen injections

1

metric metadata

20

screen chart groups

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
Read throughput	memcached.bytes_read.count	-	Byte
Write throughput	memcached.bytes_written.count	-	Byte

Metric name	Metric key	Description	Unit
Memory max bytes	memcached.limit_maxbytes	-	Byte
Memory bytes	memcached.bytes	-	Byte
Memory evictions	memcached.evictions.count	-	Count
Malloc fails	memcached.malloc_fails.count	-	Count
Memory reclaims	memcached.reclaimed.count	-	Count

Metric name	Metric key	Description	Unit
Get commands	memcached.cmd_get.count	-	Count
Set commands	memcached.cmd_set.count	-	Count
Get hits	memcached.get_hits.count	-	Count
Get misses	memcached.get_misses.count	-	Count

Metric name	Metric key	Description	Unit
Threads	memcached.threads	-	Count

Metric name	Metric key	Description	Unit
Uptime	memcached.uptime	-	Second

Metric name	Metric key	Description	Unit
Connections	memcached.curr_connections	-	Count
Rejected connections	memcached.rejected_connections.count	-	Count

Metric name	Metric key	Description	Unit
Log worker dropped	memcached.log_worker_dropped.count	-	Count
Log worker written	memcached.log_worker_written.count	-	Count
Log watcher skipped	memcached.log_watcher_skipped.count	-	Count
Log watcher sent	memcached.log_watcher_sent.count	-	Count

Customer story Fife Council, Scotland

“Dynatrace shines a torch into the dark corners of an application, so we can see right down into the code and query level. It gives you the evidence you need to be sure of root causes, so we’ve been able to work much more easily with our service providers to resolve issues and get things back on track.”

Scott Mckenzie

Technical Specialist

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

Fixed a bug where the extension would stop execution early based on missing metadata

Full version history

Fixed a bug where installations of Dynatrace with custom paths would break the extension

Full version history

Converted from EF1 to EF2:

Added new metrics:
- memcached.rejected_connections.count
- memcached.malloc_fails.count
- memcached.evictions.count
- memcached.reclaimed.count
- memcached.threads
- memcached.uptime
- memcached.log_worker_dropped.count
- memcached.log_worker_written.count
- memcached.log_watcher_skipped.count
- memcached.log_watcher_sent.count
Added feature sets
Added overview dashboard
Added injection charts into the process group instance's unified analysis screen
The following metrics no longer report their values in per second rates, but rather in per minute:
- memcached.cmd_get.count
- memcached.cmd_set.count
- memcached.get_hits.count
- memcached.get_misses.count
- memcached.bytes_read.count
- memcached.bytes_written.count

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