dbSNP_CLN> db['dbSNP_CLN.vcf'].stats() { ns: 'dbSNP_CLN.dbSNP_CLN.vcf', size: 944573231, count: 1055709, avgObjSize: 894, storageSize: 132526080, freeStorageSize: 999424, capped: false, wiredTiger: { metadata: { formatVersion: 1 }, creationString: 'access_pattern_hint=none,allocation_size=4KB,app_metadata=(formatVersion=1),assert=(commit_timestamp=none,durable_timestamp=none,read_timestamp=none,write_timestamp=off),block_allocation=best,block_compressor=zstd,cache_resident=false,checksum=on,colgroups=,collator=,columns=,dictionary=0,encryption=(keyid=,name=),exclusive=false,extractor=,format=btree,huffman_key=,huffman_value=,ignore_in_memory_cache_size=false,immutable=false,import=(enabled=false,file_metadata=,repair=false),internal_item_max=0,internal_key_max=0,internal_key_truncate=true,internal_page_max=4KB,key_format=q,key_gap=10,leaf_item_max=0,leaf_key_max=0,leaf_page_max=32KB,leaf_value_max=64MB,log=(enabled=true),lsm=(auto_throttle=true,bloom=true,bloom_bit_count=16,bloom_config=,bloom_hash_count=8,bloom_oldest=false,chunk_count_limit=0,chunk_max=5GB,chunk_size=10MB,merge_custom=(prefix=,start_generation=0,suffix=),merge_max=15,merge_min=0),memory_page_image_max=0,memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=false,prefix_compression_min=4,readonly=false,source=,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,tiered_object=false,tiered_storage=(auth_token=,bucket=,bucket_prefix=,cache_directory=,local_retention=300,name=),type=file,value_format=u,verbose=[],write_timestamp_usage=none', type: 'file', uri: 'statistics:table:collection-6--2548119596144021964', LSM: { 'bloom filter false positives': 0, 'bloom filter hits': 0, 'bloom filter misses': 0, 'bloom filter pages evicted from cache': 0, 'bloom filter pages read into cache': 0, 'bloom filters in the LSM tree': 0, 'chunks in the LSM tree': 0, 'highest merge generation in the LSM tree': 0, 'queries that could have benefited from a Bloom filter that did not exist': 0, 'sleep for LSM checkpoint throttle': 0, 'sleep for LSM merge throttle': 0, 'total size of bloom filters': 0 }, 'block-manager': { 'allocations requiring file extension': 0, 'blocks allocated': 0, 'blocks freed': 0, 'checkpoint size': 131510272, 'file allocation unit size': 4096, 'file bytes available for reuse': 999424, 'file magic number': 120897, 'file major version number': 1, 'file size in bytes': 132526080, 'minor version number': 0 }, btree: { 'btree checkpoint generation': 68, 'btree clean tree checkpoint expiration time': Long("9223372036854775807"), 'btree compact pages reviewed': 0, 'btree compact pages rewritten': 0, 'btree compact pages skipped': 0, 'btree skipped by compaction as process would not reduce size': 0, 'column-store fixed-size leaf pages': 0, 'column-store internal pages': 0, 'column-store variable-size RLE encoded values': 0, 'column-store variable-size deleted values': 0, 'column-store variable-size leaf pages': 0, 'fixed-record size': 0, 'maximum internal page size': 4096, 'maximum leaf page key size': 2867, 'maximum leaf page size': 32768, 'maximum leaf page value size': 67108864, 'maximum tree depth': 4, 'number of key/value pairs': 0, 'overflow pages': 0, 'row-store empty values': 0, 'row-store internal pages': 0, 'row-store leaf pages': 0 }, cache: { 'bytes currently in the cache': 1040067615, 'bytes dirty in the cache cumulative': 0, 'bytes read into cache': 953401842, 'bytes written from cache': 0, 'checkpoint blocked page eviction': 0, 'checkpoint of history store file blocked non-history store page eviction': 0, 'data source pages selected for eviction unable to be evicted': 0, 'eviction gave up due to detecting an out of order on disk value behind the last update on the chain': 0, 'eviction gave up due to detecting an out of order tombstone ahead of the selected on disk update': 0, 'eviction gave up due to detecting an out of order tombstone ahead of the selected on disk update after validating the update chain': 0, 'eviction gave up due to detecting out of order timestamps on the update chain after the selected on disk update': 0, 'eviction walk passes of a file': 0, 'eviction walk target pages histogram - 0-9': 0, 'eviction walk target pages histogram - 10-31': 0, 'eviction walk target pages histogram - 128 and higher': 0, 'eviction walk target pages histogram - 32-63': 0, 'eviction walk target pages histogram - 64-128': 0, 'eviction walk target pages reduced due to history store cache pressure': 0, 'eviction walks abandoned': 0, 'eviction walks gave up because they restarted their walk twice': 0, 'eviction walks gave up because they saw too many pages and found no candidates': 0, 'eviction walks gave up because they saw too many pages and found too few candidates': 0, 'eviction walks reached end of tree': 0, 'eviction walks restarted': 0, 'eviction walks started from root of tree': 0, 'eviction walks started from saved location in tree': 0, 'hazard pointer blocked page eviction': 0, 'history store table insert calls': 0, 'history store table insert calls that returned restart': 0, 'history store table out-of-order resolved updates that lose their durable timestamp': 0, 'history store table out-of-order updates that were fixed up by reinserting with the fixed timestamp': 0, 'history store table reads': 0, 'history store table reads missed': 0, 'history store table reads requiring squashed modifies': 0, 'history store table truncation by rollback to stable to remove an unstable update': 0, 'history store table truncation by rollback to stable to remove an update': 0, 'history store table truncation to remove an update': 0, 'history store table truncation to remove range of updates due to key being removed from the data page during reconciliation': 0, 'history store table truncation to remove range of updates due to out-of-order timestamp update on data page': 0, 'history store table writes requiring squashed modifies': 0, 'in-memory page passed criteria to be split': 0, 'in-memory page splits': 0, 'internal pages evicted': 0, 'internal pages split during eviction': 0, 'leaf pages split during eviction': 0, 'modified pages evicted': 0, 'overflow pages read into cache': 0, 'page split during eviction deepened the tree': 0, 'page written requiring history store records': 0, 'pages read into cache': 8177, 'pages read into cache after truncate': 0, 'pages read into cache after truncate in prepare state': 0, 'pages requested from the cache': 10396, 'pages seen by eviction walk': 0, 'pages written from cache': 0, 'pages written requiring in-memory restoration': 0, 'the number of times full update inserted to history store': 0, 'the number of times reverse modify inserted to history store': 0, 'tracked dirty bytes in the cache': 0, 'unmodified pages evicted': 0 }, cache_walk: { 'Average difference between current eviction generation when the page was last considered': 0, 'Average on-disk page image size seen': 0, 'Average time in cache for pages that have been visited by the eviction server': 0, 'Average time in cache for pages that have not been visited by the eviction server': 0, 'Clean pages currently in cache': 0, 'Current eviction generation': 0, 'Dirty pages currently in cache': 0, 'Entries in the root page': 0, 'Internal pages currently in cache': 0, 'Leaf pages currently in cache': 0, 'Maximum difference between current eviction generation when the page was last considered': 0, 'Maximum page size seen': 0, 'Minimum on-disk page image size seen': 0, 'Number of pages never visited by eviction server': 0, 'On-disk page image sizes smaller than a single allocation unit': 0, 'Pages created in memory and never written': 0, 'Pages currently queued for eviction': 0, 'Pages that could not be queued for eviction': 0, 'Refs skipped during cache traversal': 0, 'Size of the root page': 0, 'Total number of pages currently in cache': 0 }, 'checkpoint-cleanup': { 'pages added for eviction': 0, 'pages removed': 0, 'pages skipped during tree walk': 0, 'pages visited': 0 }, compression: { 'compressed page maximum internal page size prior to compression': 4096, 'compressed page maximum leaf page size prior to compression ': 131072, 'compressed pages read': 8138, 'compressed pages written': 0, 'number of blocks with compress ratio greater than 64': 0, 'number of blocks with compress ratio smaller than 16': 1610, 'number of blocks with compress ratio smaller than 2': 0, 'number of blocks with compress ratio smaller than 32': 140, 'number of blocks with compress ratio smaller than 4': 0, 'number of blocks with compress ratio smaller than 64': 0, 'number of blocks with compress ratio smaller than 8': 6388, 'page written failed to compress': 0, 'page written was too small to compress': 0 }, cursor: { 'Total number of entries skipped by cursor next calls': 0, 'Total number of entries skipped by cursor prev calls': 0, 'Total number of entries skipped to position the history store cursor': 0, 'Total number of times a search near has exited due to prefix config': 0, 'bulk loaded cursor insert calls': 0, 'cache cursors reuse count': 10, 'close calls that result in cache': 12, 'create calls': 3, 'cursor next calls that skip due to a globally visible history store tombstone': 0, 'cursor next calls that skip greater than or equal to 100 entries': 0, 'cursor next calls that skip less than 100 entries': 1055850, 'cursor prev calls that skip due to a globally visible history store tombstone': 0, 'cursor prev calls that skip greater than or equal to 100 entries': 0, 'cursor prev calls that skip less than 100 entries': 0, 'insert calls': 0, 'insert key and value bytes': 0, modify: 0, 'modify key and value bytes affected': 0, 'modify value bytes modified': 0, 'next calls': 1055850, 'open cursor count': 0, 'operation restarted': 0, 'prev calls': 0, 'remove calls': 0, 'remove key bytes removed': 0, 'reserve calls': 0, 'reset calls': 1089, 'search calls': 48, 'search history store calls': 0, 'search near calls': 1055, 'truncate calls': 0, 'update calls': 0, 'update key and value bytes': 0, 'update value size change': 0 }, reconciliation: { 'approximate byte size of timestamps in pages written': 0, 'approximate byte size of transaction IDs in pages written': 0, 'dictionary matches': 0, 'fast-path pages deleted': 0, 'internal page key bytes discarded using suffix compression': 0, 'internal page multi-block writes': 0, 'leaf page key bytes discarded using prefix compression': 0, 'leaf page multi-block writes': 0, 'leaf-page overflow keys': 0, 'maximum blocks required for a page': 0, 'overflow values written': 0, 'page checksum matches': 0, 'page reconciliation calls': 0, 'page reconciliation calls for eviction': 0, 'pages deleted': 0, 'pages written including an aggregated newest start durable timestamp ': 0, 'pages written including an aggregated newest stop durable timestamp ': 0, 'pages written including an aggregated newest stop timestamp ': 0, 'pages written including an aggregated newest stop transaction ID': 0, 'pages written including an aggregated newest transaction ID ': 0, 'pages written including an aggregated oldest start timestamp ': 0, 'pages written including an aggregated prepare': 0, 'pages written including at least one prepare': 0, 'pages written including at least one start durable timestamp': 0, 'pages written including at least one start timestamp': 0, 'pages written including at least one start transaction ID': 0, 'pages written including at least one stop durable timestamp': 0, 'pages written including at least one stop timestamp': 0, 'pages written including at least one stop transaction ID': 0, 'records written including a prepare': 0, 'records written including a start durable timestamp': 0, 'records written including a start timestamp': 0, 'records written including a start transaction ID': 0, 'records written including a stop durable timestamp': 0, 'records written including a stop timestamp': 0, 'records written including a stop transaction ID': 0 }, session: { 'object compaction': 0, 'tiered operations dequeued and processed': 0, 'tiered operations scheduled': 0, 'tiered storage local retention time (secs)': 0 }, transaction: { 'race to read prepared update retry': 0, 'rollback to stable history store records with stop timestamps older than newer records': 0, 'rollback to stable inconsistent checkpoint': 0, 'rollback to stable keys removed': 0, 'rollback to stable keys restored': 0, 'rollback to stable restored tombstones from history store': 0, 'rollback to stable restored updates from history store': 0, 'rollback to stable skipping delete rle': 0, 'rollback to stable skipping stable rle': 0, 'rollback to stable sweeping history store keys': 0, 'rollback to stable updates removed from history store': 0, 'transaction checkpoints due to obsolete pages': 0, 'update conflicts': 0 } }, nindexes: 3, indexBuilds: [], totalIndexSize: 48730112, totalSize: 181256192, indexSizes: { _id_: 11825152, '#CHROM_1_POS_1': 11128832, ID_1_REF_1_ALT_1: 25776128 }, scaleFactor: 1, ok: 1 }