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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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None
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None
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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.