Sysdig Documentation

Memcached Metrics

See also: Memcached integration information.

memcache.avg_item_size

The average size of an item.

memcache.bytes

The current number of bytes used by this server to store items.

memcache.bytes_read_rate

The rate of bytes read from the network by this server.

memcache.bytes_written_rate

The rate of bytes written to the network by this server.

memcache.cas_badval_rate

The rate at which keys are compared and swapped where the comparison (original) value did not match the supplied value.

memcache.cas_hits_rate

The rate at which keys are compared and swapped and found present.

memcache.cas_misses_rate

The rate at which keys are compared and swapped and not found present.

memcache.cmd_flush_rate

The rate of flush_all commands.

memcache.cmd_get_rate

The rate of get commands.

memcache.cmd_set_rate

The rate of set commands.

memcache.connection_structures

The number of connection structures allocated by the server.

memcache.curr_connections

The number of open connections to this server.

memcache.curr_items

The current number of items stored by the server.

memcache.delete_hits_rate

The rate at which delete commands result in items being removed.

memcache.delete_misses_rate

The rate at which delete commands result in no items being removed.

memcache.evictions_rate

The rate at which valid items are removed from cache to free memory for new items.

memcache.fill_percent

The amount of memory being used by the server for storing items as a percentage of the max allowed.

memcache.get_hit_percent

The percentage of requested keys that are found present since the start of the Memcached server.

memcache.get_hits_rate

The rate at which keys are requested and found present.

memcache.get_misses_rate

The rate at which keys are requested and not found.

memcache.items.age

The age of the oldest item in the LRU.

memcache.items.crawler_reclaimed_rate

The rate at which items freed by the LRU Crawler.

memcache.items.direct_reclaims_rate

The rate at which worker threads had to directly pull LRU tails to find memory for a new item.

memcache.items.evicted_nonzero_rate

The rate at which nonzero items which had an explicit expire time set had to be evicted from the LRU before expiring.

memcache.items.evicted_rate

The rate st which items had to be evicted from the LRU before expiring.

memcache.items.evicted_time

The number of seconds since the last access for the most recent item evicted from this class.

memcache.items.evicted_unfetched_rate

The rate at which valid items evicted from the LRU which were never touched after being set.

memcache.items.expired_unfetched_rate

The rate at which expired items reclaimed from the LRU which were never touched after being set.

memcache.items.lrutail_reflocked_rate

The rate at which items found to be refcount locked in the LRU tail.

memcache.items.moves_to_cold_rate

The rate at which items were moved from HOT or WARM into COLD.

memcache.items.moves_to_warm_rate

The rate at which items were moved from COLD to WARM.

memcache.items.moves_within_lru_rate

The rate at which active items were bumped within HOT or WARM.

memcache.items.number

The number of items presently stored in this slab class.

memcache.items.number_cold

The number of items presently stored in the COLD LRU.

memcache.items.number_hot

The number of items presently stored in the HOT LRU.

memcache.items.number_noexp

The number of items presently stored in the NOEXP class.

memcache.items.number_warm

The number of items presently stored in the WARM LRU.

memcache.items.outofmemory_rate

The rate at which the underlying slab class was unable to store a new item.

memcache.items.reclaimed_rate

The rate at which entries were stored using memory from an expired entry.

memcache.items.tailrepairs_rate

The rate at which Memcached self-healed a slab with a refcount leak.

memcache.limit_maxbytes

The number of bytes this server is allowed to use for storage.

memcache.listen_disabled_num_rate

The rate at which the server has reached the max connection limit.

memcache.pointer_size

The default size of pointers on the host OS (generally 32 or 64).

memcache.rusage_system_rate

The fraction of user time the CPU spent executing this server process.

memcache.rusage_user_rate

The fraction of time the CPU spent executing kernel code on behalf of this server process.

memcache.slabs.active_slabs

The total number of slab classes allocated.

memcache.slabs.cas_badval_rate

The rate at which CAS commands failed to modify a value due to a bad CAS ID.

memcache.slabs.cas_hits_rate

The rate at which CAS commands modified this slab class.

memcache.slabs.chunk_size

The amount of space each chunk uses.

memcache.slabs.chunks_per_page

The number of chunks that exist within one page.

memcache.slabs.cmd_set_rate

The rate at which set requests stored data in this slab class.

memcache.slabs.decr_hits_rate

The rate at which decrs commands modified this slab class.

memcache.slabs.delete_hits_rate

The rate at which delete commands succeeded in this slab class.

memcache.slabs.free_chunks

The number of chunks not yet allocated to items or freed via delete.

memcache.slabs.free_chunks_end

The number of free chunks at the end of the last allocated page.

memcache.slabs.get_hits_rate

The rate at which get requests were serviced by this slab class.

memcache.slabs.incr_hits_rate

The rate at which incrs commands modified this slab class.

memcache.slabs.mem_requested

The number of bytes requested to be stored in this slab.

memcache.slabs.total_chunks

The total number of chunks allocated to the slab class.

memcache.slabs.total_malloced

The total amount of memory allocated to slab pages.

memcache.slabs.total_pages

The total number of pages allocated to the slab class.

memcache.slabs.touch_hits_rate

The rate of touches serviced by this slab class.

memcache.slabs.used_chunks

The number of chunks that have been allocated to items.

memcache.slabs.used_chunks_rate

The rate at which chunks have been allocated to items.

memcache.threads

The number of threads used by the current Memcached server process.

memcache.total_connections_rate

The rate at which connections to this server are opened.

memcache.total_items

The total number of items stored by this server since it started.

memcache.uptime

The number of seconds this server has been running.