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From Doug Meil <doug.m...@explorysmedical.com>
Subject Re: metric questions
Date Mon, 30 Jan 2012 20:43:31 GMT

Sorry this took so long, but Mikael you are absolutely right that some of
these metrics are non-sensible in name.  I created a ticket:
https://issues.apache.org/jira/browse/HBASE-5301

The "flushSize", and "flushTime" ones (flushSize_avg_time,
flushSize_num_ops, flushTime_avg_time, flushTime_num_ops) would be better
off being treated as "flush_avg_time", "flush_num_ops", and
"flushSize_avg".


I updated the metrics where I could in another ticket.


On 11/22/11 6:37 PM, "Doug Meil" <doug.meil@explorysmedical.com> wrote:

>
>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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