USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
mongodb   3021 97.1 84.3 21641472 12996084 ?   Ssl  Feb27 56667:27 /usr/bin/mongod --config /etc/mongod.conf

db.serverStatus().wiredTiger.cache
{
	"application threads page read from disk to cache count" : 2657042,
	"application threads page read from disk to cache time (usecs)" : 388085328,
	"application threads page write from cache to disk count" : 266761274,
	"application threads page write from cache to disk time (usecs)" : 2414299779,
	"bytes belonging to page images in the cache" : 3403211247,
	"bytes belonging to the lookaside table in the cache" : 182,
	"bytes currently in the cache" : 5435745914,
	"bytes not belonging to page images in the cache" : 2032534667,
	"bytes read into cache" : 47026988836,
	"bytes written from cache" : NumberLong("3776856175328"),
	"checkpoint blocked page eviction" : 1708,
	"eviction calls to get a page" : 32023358,
	"eviction calls to get a page found queue empty" : 2515062,
	"eviction calls to get a page found queue empty after locking" : 509387,
	"eviction currently operating in aggressive mode" : 0,
	"eviction empty score" : 0,
	"eviction passes of a file" : 1883881,
	"eviction server candidate queue empty when topping up" : 85529,
	"eviction server candidate queue not empty when topping up" : 859553,
	"eviction server evicting pages" : 0,
	"eviction server slept, because we did not make progress with eviction" : 31345553,
	"eviction server unable to reach eviction goal" : 0,
	"eviction state" : 32,
	"eviction walk target pages histogram - 0-9" : 129324,
	"eviction walk target pages histogram - 10-31" : 795080,
	"eviction walk target pages histogram - 128 and higher" : 0,
	"eviction walk target pages histogram - 32-63" : 126038,
	"eviction walk target pages histogram - 64-128" : 833439,
	"eviction walks abandoned" : 252649,
	"eviction walks gave up because they restarted their walk twice" : 286047,
	"eviction walks gave up because they saw too many pages and found no candidates" : 17506,
	"eviction walks gave up because they saw too many pages and found too few candidates" : 32906,
	"eviction walks reached end of tree" : 914012,
	"eviction walks started from root of tree" : 580255,
	"eviction walks started from saved location in tree" : 1303626,
	"eviction worker thread active" : 4,
	"eviction worker thread created" : 0,
	"eviction worker thread evicting pages" : 28921953,
	"eviction worker thread removed" : 0,
	"eviction worker thread stable number" : 0,
	"failed eviction of pages that exceeded the in-memory maximum count" : 35487,
	"failed eviction of pages that exceeded the in-memory maximum time (usecs)" : 517310,
	"files with active eviction walks" : 0,
	"files with new eviction walks started" : 627965,
	"force re-tuning of eviction workers once in a while" : 0,
	"hazard pointer blocked page eviction" : 57852,
	"hazard pointer check calls" : 33233880,
	"hazard pointer check entries walked" : 190015256,
	"hazard pointer maximum array length" : 3,
	"in-memory page passed criteria to be split" : 235698,
	"in-memory page splits" : 86165,
	"internal pages evicted" : 8326,
	"internal pages split during eviction" : 61,
	"leaf pages split during eviction" : 112849,
	"lookaside score" : 0,
	"lookaside table entries" : 0,
	"lookaside table insert calls" : 0,
	"lookaside table remove calls" : 0,
	"maximum bytes configured" : 7347372032,
	"maximum page size at eviction" : 0,
	"modified pages evicted" : 28692743,
	"modified pages evicted by application threads" : 0,
	"overflow pages read into cache" : 0,
	"page split during eviction deepened the tree" : 0,
	"page written requiring lookaside records" : 0,
	"pages currently held in the cache" : 176311,
	"pages evicted because they exceeded the in-memory maximum count" : 105360,
	"pages evicted because they exceeded the in-memory maximum time (usecs)" : 965601663,
	"pages evicted because they had chains of deleted items count" : 145901,
	"pages evicted because they had chains of deleted items time (usecs)" : 293750697,
	"pages evicted by application threads" : 0,
	"pages queued for eviction" : 94503526,
	"pages queued for urgent eviction" : 302231,
	"pages queued for urgent eviction during walk" : 16993,
	"pages read into cache" : 2660205,
	"pages read into cache requiring lookaside entries" : 0,
	"pages read into cache skipping older lookaside entries" : 0,
	"pages read into cache with skipped lookaside entries needed later" : 0,
	"pages requested from the cache" : 444638466854,
	"pages seen by eviction walk" : 675910019,
	"pages selected for eviction unable to be evicted" : 103201,
	"pages walked for eviction" : 866578969,
	"pages written from cache" : 295217700,
	"pages written requiring in-memory restoration" : 886952,
	"percentage overhead" : 8,
	"tracked bytes belonging to internal pages in the cache" : 17646012,
	"tracked bytes belonging to leaf pages in the cache" : 5418099902,
	"tracked dirty bytes in the cache" : 29123058,
	"tracked dirty pages in the cache" : 74,
	"unmodified pages evicted" : 4344899
}