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stack resolved HBASE-8315. -------------------------- Resolution: Fixed Fix Version/s: 0.99.0 Committed small text change in UI and committed to master. > Documentation should have more information of LRU Stats > ------------------------------------------------------- > > Key: HBASE-8315 > URL: https://issues.apache.org/jira/browse/HBASE-8315 > Project: HBase > Issue Type: Improvement > Components: documentation > Affects Versions: 0.95.0 > Reporter: Daisuke Kobayashi > Assignee: Misty Stanley-Jones > Labels: documentation > Fix For: 0.99.0 > > Attachments: 8351.txt, Screen Shot 2014-06-13 at 10.59.05 AM.png > > > Unfortunately, there's no documentation to explain the meaning of each LRU > Stats in the regionserver logs. So this is for creating a new paragraph > regarding this. My current idea is below, but it's a little bit difficult to > explain the difference between 'cachingAccesses' and 'accesses' from an > administrator or a user views. > Could you guys help to improve the content? > {noformat} > total: The current memory size of the cache in use. > free: The total free memory currently available to store more cache entries. > max: Maximum allowed memory size of the cache. > blocks: Caches store blocks of data; this number is the current # of blocks > stored, which use up the "total" memory space. > accesses: The total number of times the cache was accessed, regardless of > result. > hits: The total number of times the cache was accessed and the result was a > successful hit (presence of looked up element in cache is a hit). > hitRatio: The current percentage for "hits / accesses". > ==== > Unclear: > cachingAccesses: cachingHits + The number of getBlock requests that were > cache misses, but only from requests that were set to use the block cache. > cachingHits: The number of getBlock requests that were cache hits, but only > from requests that were set to use the block cache. This is because all reads > ===== > cachingHitsRatio: The current percentage for "cachintHits / cachingAccesses" > evictions: The total number of times an eviction has occurred (based on the > use of the LRU algorithm) > evicted: The total number of blocks that have been evicted (based on the use > of the LRU algorithm) > evictedPerRun: The total number of blocks that have been evicted overall / > The number of times an eviction has occurred overall > {noformat} > And also, where should we add this paragraph in the documentation? -- This message was sent by Atlassian JIRA (v6.2#6252)