Hi I have enabled metrics on Hbase cluster (0.90.1), and mapped the metrics to 3 categories (missing, Present but not documented/Incomplete documentation,Ok) according to their status in the book ( http://hbase.apache.org/book.html#hbase_metrics). Is it possible to udpate the book accordingly? It seems also that rpc metrics are not documented at all.
And now some questions on the metrics: I can see some metrics present a num_ops and avg_time suffix (like rpc) but it seems that for certain metrics is it totally unclear (to me at least) or their name is missleading - for example what means compactionTime_avg_time/compactionTime_num_ops? or flushSize_avg_time and flushSize_num_ops? I mean I would have understood compaction_avg_time and flushSize or flush_avg_time. Also how can we know the unit of measure of metrics (beside memstoreSizeMB and storefileIndexSizeMB that explicitly tell the UOM)? Missing: blockCacheEvictedCount blockCacheHitCachingRatio blockCacheHitCount blockCacheMissCount compactionSize_avg_time compactionSize_num_ops compactionTime_avg_time compactionTime_num_ops flushQueueSize flushSize_avg_time flushSize_num_ops flushTime_avg_time flushTime_num_ops Present but not documented/Incomplete documentation: blockCacheHitRatio fsReadLatency_num_ops fsSyncLatency_num_ops fsWriteLatency_num_ops Ok: blockCacheCount blockCacheFree blockCacheSize compactionQueueSize fsReadLatency_avg_time fsSyncLatency_avg_time fsWriteLatency_avg_time regions requests memstoreSizeMB storefiles stores storefileIndexSizeMB Regards, Mikael.S
