MemCached
MemCached#
Overview#
The ML Pack for MemCached delivers performance and capacity dashboards to monitor efficiently your memcached servers. Covers all the key metrics around connections, client requests, storage, hash tables, etc..
Configuration#
Go in Configuration Management.
Click on the + button to add a new configuration.
Select the template Memcached. Select the Collector on which you want this configuration to be deployed; and provide a Configuration Name that is meaningful for you. The Description is optional.
In the template, enter the correct settings for your MemCached server(s). Other configuration options are possible. Browse the template to discover them.
Once done, click Apply to start the monitoring.
Metrics#
| Measurements | Fields |
|---|---|
| accepting_conns | Whether or not server is accepting conns |
| auth_cmds | Number of authentication commands handled, success or failure |
| auth_errors | Number of failed authentications |
| bytes | Current number of bytes used to store items |
| bytes_read | Total number of bytes read by this server from network |
| bytes_written | Total number of bytes sent by this server to network |
| cas_badval | Number of CAS reqs for which a key was found, but the CAS value did not match |
| cas_hits | Number of successful CAS reqs |
| cas_misses | Number of CAS reqs against missing keys |
| cmd_flush | Cumulative number of flush reqs |
| cmd_get | Cumulative number of retrieval reqs |
| cmd_set | Cumulative number of storage reqs |
| cmd_touch | Cumulative number of touch reqs |
| conn_yields | Number of times any connection yielded to another due to hitting the -R limit |
| connection_structures | Number of connection structures allocated by the server |
| curr_connections | Number of open connections |
| curr_items | Current number of items stored |
| decr_hits | Number of successful decr reqs |
| decr_misses | Number of decr reqs against missing keys |
| delete_hits | Number of deletion reqs resulting in an item being removed |
| delete_misses | Number of deletions reqs for missing keys |
| evicted_unfetched | Items evicted from LRU that were never touched by get/incr/append/etc |
| evictions | Number of valid items removed from cache to free memory for new items |
| expired_unfetched | Items pulled from LRU that were never touched by get/incr/append/etc before expiring |
| get_hits | Number of keys that have been requested and found present |
| get_misses | Number of items that have been requested and not found |
| hash_bytes | Bytes currently used by hash tables |
| hash_is_expanding | Indicates if the hash table is being grown to a new size |
| hash_power_level | Current size multiplier for hash table |
| incr_hits | Number of successful incr reqs |
| incr_misses | Number of incr reqs against missing keys |
| limit_maxbytes | Number of bytes this server is allowed to use for storage |
| listen_disabled_num | Number of times server has stopped accepting new connections (maxconns) |
| reclaimed | Number of times an entry was stored using memory from an expired entry |
| threads | Number of worker threads requested |
| total_connections | Total number of connections opened since the server started running |
| total_items | Total number of items stored since the server started |
| touch_hits | Number of keys that have been touched with a new expiration time |
| touch_misses | Number of items that have been touched and not found |
| uptime | Number of secs since the server started |