feat: gather additional stats from memcached (#10641)
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@ -41,9 +41,12 @@ Fields:
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* decr_misses - Number of decr reqs against missing keys
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* delete_hits - Number of deletion reqs resulting in an item being removed
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* delete_misses - umber of deletions reqs for missing keys
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* evicted_active - Items evicted from LRU that had been hit recently but did not jump to top of LRU
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* evicted_unfetched - Items evicted from LRU that were never touched by get/incr/append/etc
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* evictions - Number of valid items removed from cache to free memory for new items
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* expired_unfetched - Items pulled from LRU that were never touched by get/incr/append/etc before expiring
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* get_expired - Number of items that have been requested but had already expired
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* get_flushed - Number of items that have been requested but have been flushed via flush_all
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* get_hits - Number of keys that have been requested and found present
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* get_misses - Number of items that have been requested and not found
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* hash_bytes - Bytes currently used by hash tables
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@ -53,7 +56,11 @@ Fields:
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* incr_misses - Number of incr reqs against missing keys
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* limit_maxbytes - Number of bytes this server is allowed to use for storage
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* listen_disabled_num - Number of times server has stopped accepting new connections (maxconns)
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* max_connections - Max number of simultaneous connections
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* reclaimed - Number of times an entry was stored using memory from an expired entry
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* rejected_connections - Conns rejected in maxconns_fast mode
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* store_no_memory - Number of rejected storage requests caused by exhaustion of the memory limit when evictions are disabled
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* store_too_large - Number of rejected storage requests caused by attempting to write a value larger than the item size limit
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* threads - Number of worker threads requested
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* total_connections - Total number of connections opened since the server started running
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* total_items - Total number of items stored since the server started
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@ -80,5 +87,5 @@ SELECT mean(get_hits) / mean(cmd_get) as get_ratio, mean(get_misses) / mean(cmd_
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```shell
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$ ./telegraf --config telegraf.conf --input-filter memcached --test
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memcached,server=localhost:11211 get_hits=1,get_misses=2,evictions=0,limit_maxbytes=0,bytes=10,uptime=3600,curr_items=2,total_items=2,curr_connections=1,total_connections=2,connection_structures=1,cmd_get=2,cmd_set=1,delete_hits=0,delete_misses=0,incr_hits=0,incr_misses=0,decr_hits=0,decr_misses=0,cas_hits=0,cas_misses=0,bytes_read=10,bytes_written=10,threads=1,conn_yields=0 1453831884664956455
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memcached,server=localhost:11211 accepting_conns=1i,auth_cmds=0i,auth_errors=0i,bytes=0i,bytes_read=7i,bytes_written=0i,cas_badval=0i,cas_hits=0i,cas_misses=0i,cmd_flush=0i,cmd_get=0i,cmd_set=0i,cmd_touch=0i,conn_yields=0i,connection_structures=3i,curr_connections=2i,curr_items=0i,decr_hits=0i,decr_misses=0i,delete_hits=0i,delete_misses=0i,evicted_active=0i,evicted_unfetched=0i,evictions=0i,expired_unfetched=0i,get_expired=0i,get_flushed=0i,get_hits=0i,get_misses=0i,hash_bytes=524288i,hash_is_expanding=0i,hash_power_level=16i,incr_hits=0i,incr_misses=0i,limit_maxbytes=67108864i,listen_disabled_num=0i,max_connections=1024i,reclaimed=0i,rejected_connections=0i,store_no_memory=0i,store_too_large=0i,threads=4i,total_connections=3i,total_items=0i,touch_hits=0i,touch_misses=0i,uptime=3i 1644771989000000000
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```
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@ -50,9 +50,12 @@ var sendMetrics = []string{
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"decr_misses",
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"delete_hits",
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"delete_misses",
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"evicted_active",
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"evicted_unfetched",
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"evictions",
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"expired_unfetched",
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"get_expired",
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"get_flushed",
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"get_hits",
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"get_misses",
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"hash_bytes",
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@ -62,7 +65,11 @@ var sendMetrics = []string{
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"incr_misses",
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"limit_maxbytes",
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"listen_disabled_num",
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"max_connections",
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"reclaimed",
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"rejected_connections",
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"store_no_memory",
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"store_too_large",
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"threads",
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"total_connections",
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"total_items",
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@ -45,24 +45,36 @@ func TestMemcachedParseMetrics(t *testing.T) {
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key string
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value string
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}{
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{"pid", "23235"},
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{"uptime", "194"},
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{"time", "1449174679"},
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{"version", "1.4.14 (Ubuntu)"},
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{"libevent", "2.0.21-stable"},
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{"pid", "5619"},
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{"uptime", "11"},
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{"time", "1644765868"},
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{"version", "1.6.14_5_ge03751b"},
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{"libevent", "2.1.11-stable"},
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{"pointer_size", "64"},
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{"rusage_user", "0.000000"},
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{"rusage_system", "0.007566"},
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{"curr_connections", "5"},
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{"total_connections", "6"},
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{"connection_structures", "6"},
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{"rusage_user", "0.080905"},
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{"rusage_system", "0.059330"},
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{"max_connections", "1024"},
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{"curr_connections", "2"},
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{"total_connections", "3"},
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{"rejected_connections", "0"},
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{"connection_structures", "3"},
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{"response_obj_oom", "0"},
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{"response_obj_count", "1"},
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{"response_obj_bytes", "16384"},
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{"read_buf_count", "2"},
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{"read_buf_bytes", "32768"},
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{"read_buf_bytes_free", "0"},
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{"read_buf_oom", "0"},
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{"reserved_fds", "20"},
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{"cmd_get", "0"},
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{"cmd_set", "0"},
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{"cmd_flush", "0"},
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{"cmd_touch", "0"},
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{"cmd_meta", "0"},
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{"get_hits", "0"},
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{"get_misses", "0"},
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{"get_expired", "0"},
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{"get_flushed", "0"},
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{"delete_misses", "0"},
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{"delete_hits", "0"},
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{"incr_misses", "0"},
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@ -74,25 +86,57 @@ func TestMemcachedParseMetrics(t *testing.T) {
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{"cas_badval", "0"},
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{"touch_hits", "0"},
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{"touch_misses", "0"},
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{"store_too_large", "0"},
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{"store_no_memory", "0"},
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{"auth_cmds", "0"},
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{"auth_errors", "0"},
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{"bytes_read", "7"},
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{"bytes_read", "6"},
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{"bytes_written", "0"},
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{"limit_maxbytes", "67108864"},
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{"accepting_conns", "1"},
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{"listen_disabled_num", "0"},
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{"time_in_listen_disabled_us", "0"},
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{"threads", "4"},
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{"conn_yields", "0"},
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{"hash_power_level", "16"},
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{"hash_bytes", "524288"},
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{"hash_is_expanding", "0"},
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{"expired_unfetched", "0"},
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{"evicted_unfetched", "0"},
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{"slab_reassign_rescues", "0"},
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{"slab_reassign_chunk_rescues", "0"},
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{"slab_reassign_evictions_nomem", "0"},
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{"slab_reassign_inline_reclaim", "0"},
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{"slab_reassign_busy_items", "0"},
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{"slab_reassign_busy_deletes", "0"},
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{"slab_reassign_running", "0"},
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{"slabs_moved", "0"},
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{"lru_crawler_running", "0"},
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{"lru_crawler_starts", "1"},
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{"lru_maintainer_juggles", "60"},
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{"malloc_fails", "0"},
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{"log_worker_dropped", "0"},
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{"log_worker_written", "0"},
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{"log_watcher_skipped", "0"},
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{"log_watcher_sent", "0"},
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{"log_watchers", "0"},
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{"unexpected_napi_ids", "0"},
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{"round_robin_fallback", "0"},
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{"bytes", "0"},
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{"curr_items", "0"},
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{"total_items", "0"},
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{"slab_global_page_pool", "0"},
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{"expired_unfetched", "0"},
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{"evicted_unfetched", "0"},
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{"evicted_active", "0"},
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{"evictions", "0"},
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{"reclaimed", "0"},
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{"crawler_reclaimed", "0"},
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{"crawler_items_checked", "0"},
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{"lrutail_reflocked", "0"},
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{"moves_to_cold", "0"},
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{"moves_to_warm", "0"},
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{"moves_within_lru", "0"},
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{"direct_reclaims", "0"},
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{"lru_bumps_dropped", "0"},
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}
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for _, test := range tests {
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@ -108,24 +152,36 @@ func TestMemcachedParseMetrics(t *testing.T) {
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}
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}
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var memcachedStats = `STAT pid 23235
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STAT uptime 194
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STAT time 1449174679
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STAT version 1.4.14 (Ubuntu)
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STAT libevent 2.0.21-stable
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var memcachedStats = `STAT pid 5619
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STAT uptime 11
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STAT time 1644765868
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STAT version 1.6.14_5_ge03751b
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STAT libevent 2.1.11-stable
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STAT pointer_size 64
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STAT rusage_user 0.000000
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STAT rusage_system 0.007566
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STAT curr_connections 5
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STAT total_connections 6
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STAT connection_structures 6
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STAT rusage_user 0.080905
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STAT rusage_system 0.059330
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STAT max_connections 1024
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STAT curr_connections 2
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STAT total_connections 3
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STAT rejected_connections 0
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STAT connection_structures 3
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STAT response_obj_oom 0
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STAT response_obj_count 1
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STAT response_obj_bytes 16384
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STAT read_buf_count 2
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STAT read_buf_bytes 32768
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STAT read_buf_bytes_free 0
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STAT read_buf_oom 0
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STAT reserved_fds 20
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STAT cmd_get 0
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STAT cmd_set 0
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STAT cmd_flush 0
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STAT cmd_touch 0
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STAT cmd_meta 0
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STAT get_hits 0
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STAT get_misses 0
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STAT get_expired 0
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STAT get_flushed 0
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STAT delete_misses 0
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STAT delete_hits 0
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STAT incr_misses 0
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@ -137,24 +193,56 @@ STAT cas_hits 0
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STAT cas_badval 0
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STAT touch_hits 0
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STAT touch_misses 0
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STAT store_too_large 0
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STAT store_no_memory 0
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STAT auth_cmds 0
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STAT auth_errors 0
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STAT bytes_read 7
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STAT bytes_read 6
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STAT bytes_written 0
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STAT limit_maxbytes 67108864
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STAT accepting_conns 1
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STAT listen_disabled_num 0
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STAT time_in_listen_disabled_us 0
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STAT threads 4
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STAT conn_yields 0
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STAT hash_power_level 16
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STAT hash_bytes 524288
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STAT hash_is_expanding 0
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STAT expired_unfetched 0
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STAT evicted_unfetched 0
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STAT slab_reassign_rescues 0
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STAT slab_reassign_chunk_rescues 0
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STAT slab_reassign_evictions_nomem 0
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STAT slab_reassign_inline_reclaim 0
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STAT slab_reassign_busy_items 0
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STAT slab_reassign_busy_deletes 0
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STAT slab_reassign_running 0
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STAT slabs_moved 0
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STAT lru_crawler_running 0
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STAT lru_crawler_starts 1
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STAT lru_maintainer_juggles 60
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STAT malloc_fails 0
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STAT log_worker_dropped 0
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STAT log_worker_written 0
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STAT log_watcher_skipped 0
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STAT log_watcher_sent 0
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STAT log_watchers 0
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STAT unexpected_napi_ids 0
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STAT round_robin_fallback 0
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STAT bytes 0
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STAT curr_items 0
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STAT total_items 0
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STAT slab_global_page_pool 0
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STAT expired_unfetched 0
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STAT evicted_unfetched 0
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STAT evicted_active 0
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STAT evictions 0
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STAT reclaimed 0
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STAT crawler_reclaimed 0
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STAT crawler_items_checked 0
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STAT lrutail_reflocked 0
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STAT moves_to_cold 0
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STAT moves_to_warm 0
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STAT moves_within_lru 0
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STAT direct_reclaims 0
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STAT lru_bumps_dropped 0
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END
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`
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