Details
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Bug
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Resolution: Done
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Minor - P4
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None
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None
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None
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Fully Compatible
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ALL
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Description
Discovered while verifying that SERVER-21553 had been fixed after the latest WiredTiger drop. <collStats>.wiredTiger["block-manager"] reports that the file size (compressed) is 3.090GB and that 3.089GB is available for reuse.
$ ./mongo --port 20010 --eval 'db.getSiblingDB("local").oplog.rs.stats(1024 * 1024)'
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{
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"ns" : "local.oplog.rs",
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"count" : 4846273,
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"size" : 5136,
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"avgObjSize" : 1111,
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"storageSize" : 3164,
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"capped" : true,
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"max" : -1,
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"maxSize" : 5120,
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"sleepCount" : 0,
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"sleepMS" : 0,
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"wiredTiger" : {
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"metadata" : {
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"formatVersion" : 1,
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"oplogKeyExtractionVersion" : 1
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},
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"creationString" : "allocation_size=4KB,app_metadata=(formatVersion=1,oplogKeyExtractionVersion=1),block_allocation=best,block_compressor=snappy,cache_resident=0,checksum=on,colgroups=,collator=,columns=,dictionary=0,encryption=(keyid=,name=),exclusive=0,extractor=,format=btree,huffman_key=,huffman_value=,immutable=0,internal_item_max=0,internal_key_max=0,internal_key_truncate=,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=),lsm=(auto_throttle=,bloom=,bloom_bit_count=16,bloom_config=,bloom_hash_count=8,bloom_oldest=0,chunk_count_limit=0,chunk_max=5GB,chunk_size=10MB,merge_max=15,merge_min=0),memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=0,prefix_compression_min=4,source=,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,type=file,value_format=u",
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"type" : "file",
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"uri" : "statistics:table:collection-4--1644201538843773907",
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"LSM" : {
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"bloom filters in the LSM tree" : 0,
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"bloom filter false positives" : 0,
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"bloom filter hits" : 0,
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"bloom filter misses" : 0,
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"bloom filter pages evicted from cache" : 0,
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"bloom filter pages read into cache" : 0,
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"total size of bloom filters" : 0,
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"sleep for LSM checkpoint throttle" : 0,
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"chunks in the LSM tree" : 0,
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"highest merge generation in the LSM tree" : 0,
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"queries that could have benefited from a Bloom filter that did not exist" : 0,
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"sleep for LSM merge throttle" : 0
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},
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"block-manager" : {
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"file allocation unit size" : 4096,
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"blocks allocated" : 1619875,
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"checkpoint size" : 0,
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"allocations requiring file extension" : 116476,
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"blocks freed" : 1619842,
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"file magic number" : 120897,
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"file major version number" : 1,
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"minor version number" : 0,
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"file bytes available for reuse" : 3317309440,
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"file size in bytes" : 3318251520
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},
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"btree" : {
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"btree checkpoint generation" : 0,
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"column-store variable-size deleted values" : 0,
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"column-store fixed-size leaf pages" : 0,
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"column-store internal pages" : 0,
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"column-store variable-size RLE encoded values" : 0,
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"column-store variable-size leaf pages" : 0,
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"pages rewritten by compaction" : 0,
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"number of key/value pairs" : 0,
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"fixed-record size" : 0,
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"maximum tree depth" : 4,
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"maximum internal page key size" : 368,
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"maximum internal page size" : 4096,
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"maximum leaf page key size" : 3276,
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"maximum leaf page size" : 32768,
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"maximum leaf page value size" : 67108864,
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"overflow pages" : 0,
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"row-store internal pages" : 0,
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"row-store leaf pages" : 0
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},
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"cache" : {
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"bytes read into cache" : 12792485,
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"bytes written from cache" : 52784127588,
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"checkpoint blocked page eviction" : 0,
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"unmodified pages evicted" : 0,
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"page split during eviction deepened the tree" : 1,
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"modified pages evicted" : 24152,
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"data source pages selected for eviction unable to be evicted" : 5474,
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"hazard pointer blocked page eviction" : 947,
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"internal pages evicted" : 989,
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"internal pages split during eviction" : 10,
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"leaf pages split during eviction" : 6625,
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"in-memory page splits" : 23899,
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"in-memory page passed criteria to be split" : 69187,
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"overflow values cached in memory" : 0,
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"pages read into cache" : 393,
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"pages read into cache requiring lookaside entries" : 0,
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"overflow pages read into cache" : 0,
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"pages written from cache" : 1619875,
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"page written requiring lookaside records" : 0,
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"pages written requiring in-memory restoration" : 0
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},
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"compression" : {
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"raw compression call failed, no additional data available" : 0,
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"raw compression call failed, additional data available" : 0,
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"raw compression call succeeded" : 0,
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"compressed pages read" : 393,
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"compressed pages written" : 1618788,
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"page written failed to compress" : 723,
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"page written was too small to compress" : 364
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},
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"cursor" : {
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"create calls" : 1442,
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"insert calls" : 169121923,
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"bulk-loaded cursor-insert calls" : 0,
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"cursor-insert key and value bytes inserted" : 189478787539,
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"next calls" : 117370728,
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"prev calls" : 3,
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"remove calls" : 3400,
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"cursor-remove key bytes removed" : 30600,
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"reset calls" : 169128727,
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"restarted searches" : 1479224,
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"search calls" : 0,
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"search near calls" : 6800,
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"truncate calls" : 3400,
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"update calls" : 0,
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"cursor-update value bytes updated" : 0
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},
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"reconciliation" : {
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"dictionary matches" : 0,
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"internal page multi-block writes" : 0,
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"leaf page multi-block writes" : 6625,
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"maximum blocks required for a page" : 244,
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"internal-page overflow keys" : 0,
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"leaf-page overflow keys" : 0,
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"overflow values written" : 0,
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"pages deleted" : 17527,
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"fast-path pages deleted" : 1619482,
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"page checksum matches" : 0,
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"page reconciliation calls" : 24162,
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"page reconciliation calls for eviction" : 24162,
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"leaf page key bytes discarded using prefix compression" : 0,
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"internal page key bytes discarded using suffix compression" : 1619678
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},
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"session" : {
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"object compaction" : 0,
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"open cursor count" : 10
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},
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"transaction" : {
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"update conflicts" : 0
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}
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},
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"nindexes" : 0,
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"totalIndexSize" : 0,
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"indexSizes" : {
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},
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"ok" : 1
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}
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git version: 86e7b69a6c52c926d28a60d816faefa6db81eb96