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MemcachedMemcached
Memcached

Memcached

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

Extension
Free trialDocumentation
Monitor each memcached instance individually with all of their key metrics by activating the extension on your environment. The extension's metrics are added automatically to the process screen.Easily glance over your memcached monitored environment and navigate to them by using the overview dashboard included in the 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

For more information on the installation and configuration, please see Memcached extension in the Dynatrace Documentation.

Details

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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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 nameMetric keyDescriptionUnit
Connectionsmemcached.curr_connectionsCurrent number of client connections to MemcachedCount
Rejected connectionsmemcached.rejected_connections.countNumber of client connections rejected by MemcachedCount
Metric nameMetric keyDescriptionUnit
Log worker droppedmemcached.log_worker_dropped.countNumber of log entries dropped by the log worker in MemcachedCount
Log worker writtenmemcached.log_worker_written.countNumber of log entries written by the log worker in MemcachedCount
Log watcher skippedmemcached.log_watcher_skipped.countNumber of log entries skipped by the log watcher in MemcachedCount
Log watcher sentmemcached.log_watcher_sent.countNumber of log entries sent by the log watcher in MemcachedCount
Metric nameMetric keyDescriptionUnit
Read throughputmemcached.bytes_read.countNumber of bytes read from MemcachedByte
Write throughputmemcached.bytes_written.countNumber of bytes written to MemcachedByte
Metric nameMetric keyDescriptionUnit
Memory max bytesmemcached.limit_maxbytesMaximum memory allocated for MemcachedByte
Memory bytesmemcached.bytesCurrent memory usage in MemcachedByte
Memory evictionsmemcached.evictions.countNumber of items evicted from cache in MemcachedCount
Malloc failsmemcached.malloc_fails.countNumber of memory allocation failures in MemcachedCount
Memory reclaimsmemcached.reclaimed.countNumber of memory reclaims in MemcachedCount
Metric nameMetric keyDescriptionUnit
Get commandsmemcached.cmd_get.countNumber of get commands executed in MemcachedCount
Set commandsmemcached.cmd_set.countNumber of set commands executed in MemcachedCount
Get hitsmemcached.get_hits.countNumber of successful get commands in MemcachedCount
Get missesmemcached.get_misses.countNumber of unsuccessful get commands in MemcachedCount
Metric nameMetric keyDescriptionUnit
Threadsmemcached.threadsNumber of threads in MemcachedCount
Metric nameMetric keyDescriptionUnit
Uptimememcached.uptimeUptime of the Memcached instance, in secondsSecond

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

  • Added feature set recommendations
  • Added description to all metrics

⚠️Breaking change: All monotonic metrics from the extension now have the .count suffix in PLATFORM, which they didn't before. This will break any configuration that references these metrics by their key. This change does not have any effect on Managed.

The complete list is:

  • memcached.rejected_connections -> memcached.rejected_connections.count
  • memcached.evictions -> memcached.evictions.count
  • memcached.malloc_fails -> memcached.malloc_fails.count
  • memcached.reclaimed -> memcached.reclaimed.count
  • memcached.cmd_get -> memcached.cmd_get.count
  • memcached.cmd_set -> memcached.cmd_set.count
  • memcached.get_hits -> memcached.get_hits.count
  • memcached.get_misses -> memcached.get_misses.count
  • memcached.bytes_read -> memcached.bytes_read.count
  • memcached.bytes_written -> memcached.bytes_written.count
  • memcached.log_worker_dropped -> memcached.log_worker_dropped.count
  • memcached.log_worker_written -> memcached.log_worker_written.count
  • memcached.log_watcher_skipped -> memcached.log_watcher_skipped.count
  • memcached.log_watcher_sent -> memcached.log_watcher_sent.count

Full version history

New in this version:

  • Added keyword key value pairs to extension

Full version history

  • Add support for the dt.security_context attribute
  • Add new platform dashboard
  • Add platform screens

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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