feat(inputs/memcached): Additional stats from memcached 1.6.14

plugins/inputs/memcached/README.md

@@ -41,9 +41,12 @@ Fields:
 * decr_misses - Number of decr reqs against missing keys
 * delete_hits - Number of deletion reqs resulting in an item being removed
 * delete_misses - umber of deletions reqs for missing keys
+* evicted_active - Items evicted from LRU that had been hit recently but did not jump to top of LRU
 * 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_expired - Number of items that have been requested but had already expired
+* get_flushed - Number of items that have been requested but have been flushed via flush_all
 * 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
@@ -53,7 +56,11 @@ Fields:
 * 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)
+* max_connections - Max number of simultaneous connections
 * reclaimed - Number of times an entry was stored using memory from an expired entry
+* rejected_connections - Conns rejected in maxconns_fast mode
+* store_no_memory - Number of rejected storage requests caused by exhaustion of the memory limit when evictions are disabled
+* store_too_large - Number of rejected storage requests caused by attempting to write a value larger than the item size limit
 * 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
@@ -80,5 +87,5 @@ SELECT mean(get_hits) / mean(cmd_get) as get_ratio, mean(get_misses) / mean(cmd_
 
 ```shell
 $ ./telegraf --config telegraf.conf --input-filter memcached --test
-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
+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
 ```

plugins/inputs/memcached/memcached.go

@@ -50,9 +50,12 @@ var sendMetrics = []string{
 	"decr_misses",
 	"delete_hits",
 	"delete_misses",
+	"evicted_active",
 	"evicted_unfetched",
 	"evictions",
 	"expired_unfetched",
+	"get_expired",
+	"get_flushed",
 	"get_hits",
 	"get_misses",
 	"hash_bytes",
@@ -62,7 +65,11 @@ var sendMetrics = []string{
 	"incr_misses",
 	"limit_maxbytes",
 	"listen_disabled_num",
+	"max_connections",
 	"reclaimed",
+	"rejected_connections",
+	"store_no_memory",
+	"store_too_large",
 	"threads",
 	"total_connections",
 	"total_items",

plugins/inputs/memcached/memcached_test.go

@@ -45,24 +45,36 @@ func TestMemcachedParseMetrics(t *testing.T) {
 		key   string
 		value string
 	}{
-		{"pid", "23235"},
-		{"uptime", "194"},
-		{"time", "1449174679"},
-		{"version", "1.4.14 (Ubuntu)"},
-		{"libevent", "2.0.21-stable"},
+		{"pid", "5619"},
+		{"uptime", "11"},
+		{"time", "1644765868"},
+		{"version", "1.6.14_5_ge03751b"},
+		{"libevent", "2.1.11-stable"},
 		{"pointer_size", "64"},
-		{"rusage_user", "0.000000"},
-		{"rusage_system", "0.007566"},
-		{"curr_connections", "5"},
-		{"total_connections", "6"},
-		{"connection_structures", "6"},
+		{"rusage_user", "0.080905"},
+		{"rusage_system", "0.059330"},
+		{"max_connections", "1024"},
+		{"curr_connections", "2"},
+		{"total_connections", "3"},
+		{"rejected_connections", "0"},
+		{"connection_structures", "3"},
+		{"response_obj_oom", "0"},
+		{"response_obj_count", "1"},
+		{"response_obj_bytes", "16384"},
+		{"read_buf_count", "2"},
+		{"read_buf_bytes", "32768"},
+		{"read_buf_bytes_free", "0"},
+		{"read_buf_oom", "0"},
 		{"reserved_fds", "20"},
 		{"cmd_get", "0"},
 		{"cmd_set", "0"},
 		{"cmd_flush", "0"},
 		{"cmd_touch", "0"},
+		{"cmd_meta", "0"},
 		{"get_hits", "0"},
 		{"get_misses", "0"},
+		{"get_expired", "0"},
+		{"get_flushed", "0"},
 		{"delete_misses", "0"},
 		{"delete_hits", "0"},
 		{"incr_misses", "0"},
@@ -74,25 +86,57 @@ func TestMemcachedParseMetrics(t *testing.T) {
 		{"cas_badval", "0"},
 		{"touch_hits", "0"},
 		{"touch_misses", "0"},
+		{"store_too_large", "0"},
+		{"store_no_memory", "0"},
 		{"auth_cmds", "0"},
 		{"auth_errors", "0"},
-		{"bytes_read", "7"},
+		{"bytes_read", "6"},
 		{"bytes_written", "0"},
 		{"limit_maxbytes", "67108864"},
 		{"accepting_conns", "1"},
 		{"listen_disabled_num", "0"},
+		{"time_in_listen_disabled_us", "0"},
 		{"threads", "4"},
 		{"conn_yields", "0"},
 		{"hash_power_level", "16"},
 		{"hash_bytes", "524288"},
 		{"hash_is_expanding", "0"},
-		{"expired_unfetched", "0"},
-		{"evicted_unfetched", "0"},
+		{"slab_reassign_rescues", "0"},
+		{"slab_reassign_chunk_rescues", "0"},
+		{"slab_reassign_evictions_nomem", "0"},
+		{"slab_reassign_inline_reclaim", "0"},
+		{"slab_reassign_busy_items", "0"},
+		{"slab_reassign_busy_deletes", "0"},
+		{"slab_reassign_running", "0"},
+		{"slabs_moved", "0"},
+		{"lru_crawler_running", "0"},
+		{"lru_crawler_starts", "1"},
+		{"lru_maintainer_juggles", "60"},
+		{"malloc_fails", "0"},
+		{"log_worker_dropped", "0"},
+		{"log_worker_written", "0"},
+		{"log_watcher_skipped", "0"},
+		{"log_watcher_sent", "0"},
+		{"log_watchers", "0"},
+		{"unexpected_napi_ids", "0"},
+		{"round_robin_fallback", "0"},
 		{"bytes", "0"},
 		{"curr_items", "0"},
 		{"total_items", "0"},
+		{"slab_global_page_pool", "0"},
+		{"expired_unfetched", "0"},
+		{"evicted_unfetched", "0"},
+		{"evicted_active", "0"},
 		{"evictions", "0"},
 		{"reclaimed", "0"},
+		{"crawler_reclaimed", "0"},
+		{"crawler_items_checked", "0"},
+		{"lrutail_reflocked", "0"},
+		{"moves_to_cold", "0"},
+		{"moves_to_warm", "0"},
+		{"moves_within_lru", "0"},
+		{"direct_reclaims", "0"},
+		{"lru_bumps_dropped", "0"},
 	}
 
 	for _, test := range tests {
@@ -108,24 +152,36 @@ func TestMemcachedParseMetrics(t *testing.T) {
 	}
 }
 
-var memcachedStats = `STAT pid 23235
-STAT uptime 194
-STAT time 1449174679
-STAT version 1.4.14 (Ubuntu)
-STAT libevent 2.0.21-stable
+var memcachedStats = `STAT pid 5619
+STAT uptime 11
+STAT time 1644765868
+STAT version 1.6.14_5_ge03751b
+STAT libevent 2.1.11-stable
 STAT pointer_size 64
-STAT rusage_user 0.000000
-STAT rusage_system 0.007566
-STAT curr_connections 5
-STAT total_connections 6
-STAT connection_structures 6
+STAT rusage_user 0.080905
+STAT rusage_system 0.059330
+STAT max_connections 1024
+STAT curr_connections 2
+STAT total_connections 3
+STAT rejected_connections 0
+STAT connection_structures 3
+STAT response_obj_oom 0
+STAT response_obj_count 1
+STAT response_obj_bytes 16384
+STAT read_buf_count 2
+STAT read_buf_bytes 32768
+STAT read_buf_bytes_free 0
+STAT read_buf_oom 0
 STAT reserved_fds 20
 STAT cmd_get 0
 STAT cmd_set 0
 STAT cmd_flush 0
 STAT cmd_touch 0
+STAT cmd_meta 0
 STAT get_hits 0
 STAT get_misses 0
+STAT get_expired 0
+STAT get_flushed 0
 STAT delete_misses 0
 STAT delete_hits 0
 STAT incr_misses 0
@@ -137,24 +193,56 @@ STAT cas_hits 0
 STAT cas_badval 0
 STAT touch_hits 0
 STAT touch_misses 0
+STAT store_too_large 0
+STAT store_no_memory 0
 STAT auth_cmds 0
 STAT auth_errors 0
-STAT bytes_read 7
+STAT bytes_read 6
 STAT bytes_written 0
 STAT limit_maxbytes 67108864
 STAT accepting_conns 1
 STAT listen_disabled_num 0
+STAT time_in_listen_disabled_us 0
 STAT threads 4
 STAT conn_yields 0
 STAT hash_power_level 16
 STAT hash_bytes 524288
 STAT hash_is_expanding 0
-STAT expired_unfetched 0
-STAT evicted_unfetched 0
+STAT slab_reassign_rescues 0
+STAT slab_reassign_chunk_rescues 0
+STAT slab_reassign_evictions_nomem 0
+STAT slab_reassign_inline_reclaim 0
+STAT slab_reassign_busy_items 0
+STAT slab_reassign_busy_deletes 0
+STAT slab_reassign_running 0
+STAT slabs_moved 0
+STAT lru_crawler_running 0
+STAT lru_crawler_starts 1
+STAT lru_maintainer_juggles 60
+STAT malloc_fails 0
+STAT log_worker_dropped 0
+STAT log_worker_written 0
+STAT log_watcher_skipped 0
+STAT log_watcher_sent 0
+STAT log_watchers 0
+STAT unexpected_napi_ids 0
+STAT round_robin_fallback 0
 STAT bytes 0
 STAT curr_items 0
 STAT total_items 0
+STAT slab_global_page_pool 0
+STAT expired_unfetched 0
+STAT evicted_unfetched 0
+STAT evicted_active 0
 STAT evictions 0
 STAT reclaimed 0
+STAT crawler_reclaimed 0
+STAT crawler_items_checked 0
+STAT lrutail_reflocked 0
+STAT moves_to_cold 0
+STAT moves_to_warm 0
+STAT moves_within_lru 0
+STAT direct_reclaims 0
+STAT lru_bumps_dropped 0
 END
 `