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Type:
Improvement
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Resolution: Won't Fix
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Priority:
Major - P3
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None
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Affects Version/s: 2.8.0-rc2
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Component/s: Diagnostics, Storage
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Major Change
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None
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3
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db.collection.validate(
{full:true}) results have wiredtiger specific stats mentioned under "wiredTiger" in the resulted document. mmapv1 specific stats probably should follow the same format for consistency.
stats for 2.8 WT:
{ "ns" : "test.foo", "nrecords" : 0, "wiredTiger" : { "uri" : "statistics:table:collection-2--967935493900454154", "LSM" : { "bloom filters in the LSM tree" : 0, "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, "total size of bloom filters" : 0, "sleep for LSM checkpoint throttle" : 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 merge throttle" : 0 }, "block-manager" : { "file allocation unit size" : 4096, "blocks allocated" : 0, "checkpoint size" : 0, "allocations requiring file extension" : 0, "blocks freed" : 0, "file magic number" : 120897, "file major version number" : 1, "minor version number" : 0, "file bytes available for reuse" : 0, "file size in bytes" : 4096 }, "btree" : { "column-store variable-size deleted values" : 0, "column-store fixed-size leaf pages" : 0, "column-store internal pages" : 0, "column-store variable-size leaf pages" : 0, "pages rewritten by compaction" : 0, "number of key/value pairs" : 0, "fixed-record size" : 0, "maximum tree depth" : 0, "maximum internal page item size" : 384, "maximum internal page size" : 4096, "maximum leaf page item size" : 3072, "maximum leaf page size" : 32768, "overflow pages" : 0, "row-store internal pages" : 0, "row-store leaf pages" : 0 }, "cache" : { "bytes read into cache" : 0, "bytes written from cache" : 0, "checkpoint blocked page eviction" : 0, "unmodified pages evicted" : 0, "modified pages evicted" : 0, "data source pages selected for eviction unable to be evicted" : 0, "hazard pointer blocked page eviction" : 0, "internal pages evicted" : 0, "in-memory page splits" : 0, "overflow values cached in memory" : 0, "pages read into cache" : 0, "overflow pages read into cache" : 0, "pages written from cache" : 0 }, "compression" : { "raw compression call failed, no additional data available" : 0, "raw compression call failed, additional data available" : 0, "raw compression call succeeded" : 0, "compressed pages read" : 0, "compressed pages written" : 0, "page written failed to compress" : 0, "page written was too small to compress" : 0 }, "cursor" : { "create calls" : 1, "insert calls" : 0, "bulk-loaded cursor-insert calls" : 0, "cursor-insert key and value bytes inserted" : 0, "next calls" : 1, "prev calls" : 1, "remove calls" : 0, "cursor-remove key bytes removed" : 0, "reset calls" : 1, "search calls" : 0, "search near calls" : 0, "update calls" : 0, "cursor-update value bytes updated" : 0 }, "reconciliation" : { "dictionary matches" : 0, "internal page multi-block writes" : 0, "leaf page multi-block writes" : 0, "maximum blocks required for a page" : 0, "internal-page overflow keys" : 0, "leaf-page overflow keys" : 0, "overflow values written" : 0, "pages deleted" : 0, "page checksum matches" : 0, "page reconciliation calls" : 0, "page reconciliation calls for eviction" : 0, "leaf page key bytes discarded using prefix compression" : 0, "internal page key bytes discarded using suffix compression" : 0 }, "session" : { "object compaction" : 0, "open cursor count" : 1 }, "transaction" : { "update conflicts" : 0 } }, "nIndexes" : 1, "keysPerIndex" : { "test.foo.$_id_" : 0 }, "valid" : true, "errors" : [ ], "warning" : "Some checks omitted for speed. use {full:true} option to do more thorough scan.", "ok" : 1 }
- In 2.8 mmapv1:
{ "ns" : "test.foo", "datasize" : 0, "nrecords" : 0, "lastExtentSize" : 8192, "firstExtent" : "0:6000 ns:test.foo", "lastExtent" : "0:6000 ns:test.foo", "extentCount" : 1, "firstExtentDetails" : { "loc" : "0:6000", "xnext" : "null", "xprev" : "null", "nsdiag" : "test.foo", "size" : 8192, "firstRecord" : "null", "lastRecord" : "null" }, "deletedCount" : 1, "deletedSize" : 8016, "nIndexes" : 1, "keysPerIndex" : { "test.foo.$_id_" : 0 }, "valid" : true, "errors" : [ ], "warning" : "Some checks omitted for speed. use {full:true} option to do more thorough scan.", "ok" : 1 }
For ex. extent related stats could be bundled up under "mmapv1" in the resulted document.