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From "Doug Meil (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-3710) Book.xml - fill out descriptions of metrics
Date Tue, 29 Mar 2011 19:30:05 GMT
Book.xml - fill out descriptions of metrics
-------------------------------------------

                 Key: HBASE-3710
                 URL: https://issues.apache.org/jira/browse/HBASE-3710
             Project: HBase
          Issue Type: Improvement
            Reporter: Doug Meil
            Priority: Minor



I filled out the skeleton of the metrics in book.xml, but I'd like one of the committers to
fill in the rest of the details on what these mean.  Thanks! :-)

For example..

-------

I'm assuming that these are referring to the LRU block cache in memory.  I'd like to docs
to state this (for the sake of clarity) and also the units (e.g., MB).

hbase.regionserver.blockCacheCount
hbase.regionserver.blockCacheFree
hbase.regionserver.blockCacheHitRatio
hbase.regionserver.blockCacheSize

-------

This is read latency from HDFS, I assume...

hbase.regionserver.fsReadLatency_avg_time
hbase.regionserver.fsReadLatency_num_ops
hbase.regionserver.fsSyncLatency_avg_time
hbase.regionserver.fsSyncLatency_num_ops
hbase.regionserver.fsWriteLatency_avg_time
hbase.regionserver.fsWriteLatency_num_ops

----------------

point in time utilized (i.e., as opposed to max or trailing) memstore I assume, would be nice
to document.

hbase.regionserver.memstoreSizeMB

---------------

obvious, but might as well document it

hbase.regionserver.regions

--------------

This is any Put, Get, Delete, or Scan operation, I assume?

hbase.regionserver.requests

--------------

detail on these would be nice, especially for tips on if there are any critical numbers/ratios
to watch for.

hbase.regionserver.storeFileIndexSizeMB
hbase.regionserver.stores


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