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collectd/memcached

Monitors an instance of memcached using the collectd memcached plugin.

See the integrations doc for more information.

Monitor Type: collectd/memcached

Monitor Source Code

Accepts Endpoints: Yes

Multiple Instances Allowed: Yes

Configuration

Config option Required Type Description
host yes string
port yes integer
name no string
reportHost no bool (default: false)

Metrics

The following table lists the metrics available for this monitor. Metrics that are marked as Included are standard metrics and are monitored by default.

Name Type Included Description
df.cache.free gauge ✔ Unused storage bytes
df.cache.used gauge ✔ Current number of bytes used to store items
memcached_command.flush cumulative Number of flush requests
memcached_command.get cumulative ✔ Number of retrieval requests
memcached_command.set cumulative ✔ Number of storage requests
memcached_command.touch cumulative Number of touch requests
memcached_connections.current gauge ✔ Current number of open connections
memcached_connections.listen_disabled gauge Number of times connection limit has been exceeded
memcached_items.current gauge ✔ Current number of items stored by this instance
memcached_octets.rx cumulative ✔ Total network bytes read by this server
memcached_octets.tx cumulative ✔ Total network bytes written by this server
memcached_ops.decr_hits cumulative Number of successful Decr requests
memcached_ops.decr_misses cumulative Number of decr requests against missing keys
memcached_ops.evictions cumulative ✔ Number of valid items removed from cache
memcached_ops.hits cumulative ✔ Number of keys that have been requested and found present
memcached_ops.incr_hits cumulative Number of successful incr requests
memcached_ops.incr_misses cumulative Number of incr requests against missing keys
memcached_ops.misses cumulative ✔ Number of items that have been requested and not found
ps_count.threads gauge Number of worker threads requested
ps_cputime.syst cumulative Total system time for this instance
ps_cputime.user cumulative Total user time for this instance

To specify custom metrics you want to monitor, add a metricsToInclude filter to the agent configuration, as shown in the code snippet below. The snippet lists all available custom metrics. You can copy and paste the snippet into your configuration file, then delete any custom metrics that you do not want sent.

Note that some of the custom metrics require you to set a flag as well as add them to the list. Check the monitor configuration file to see if a flag is required for gathering additional metrics.

metricsToInclude:
  - metricNames:
    - memcached_command.flush
    - memcached_command.touch
    - memcached_connections.listen_disabled
    - memcached_ops.decr_hits
    - memcached_ops.decr_misses
    - memcached_ops.incr_hits
    - memcached_ops.incr_misses
    - ps_count.threads
    - ps_cputime.syst
    - ps_cputime.user
    monitorType: collectd/memcached