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From Doug Meil <doug.m...@explorysmedical.com>
Subject Re: metric questions
Date Tue, 22 Nov 2011 23:37:59 GMT

Thanks Mikael for the review. I'll put it in the docs queue.




On 11/22/11 5:23 PM, "Mikael Sitruk" <mikael.sitruk@gmail.com> wrote:

>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



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