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https://issues.apache.org/jira/browse/HBASE-12455?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
stack updated HBASE-12455:
--------------------------
Attachment: 12455.txt
I tried to make it so if you added a '?description=true' param on your /jmx
query, then we'd print out descriptions. Unfortunately it will take more work
than I've done here.
Here is it working:
{code}
...
"name" : "regionCount",
"description" : "Number of regions",
"value" : 2,
"name" : "storeCount",
"description" : "Number of Stores",
"value" : 2,
"name" : "hlogFileCount",
"description" : "Number of HLog Files",
"value" : 2,
"name" : "hlogFileSize",
"description" : "Size of all HLog Files",
"value" : 0,
"name" : "storeFileCount",
"description" : "Number of Store Files",
"value" : 2,
"name" : "memStoreSize",
"description" : "Size of the memstore",
"value" : 26880,
"name" : "storeFileSize",
"description" : "Size of storefiles being served.",
"value" : 14415,
"name" : "regionServerStartTime",
"description" : "RegionServer Start Time",
"value" : 1415683550907,
"name" : "totalRequestCount",
"description" : "Total number of requests this RegionServer has answered.",
"value" : 53,
"name" : "readRequestCount",
"description" : "Number of read requests this region server has answered.",
"value" : 13,
"name" : "writeRequestCount",
"description" : "Number of mutation requests this region server has
answered.",
"value" : 42,
"name" : "checkMutateFailedCount",
"description" : "Number of Check and Mutate calls that failed the checks.",
"value" : 0,
"name" : "checkMutatePassedCount",
"description" : "Number of Check and Mutate calls that passed the checks.",
"value" : 0,
"name" : "storeFileIndexSize",
"description" : "Size of indexes in storefiles on disk.",
"value" : 848,
...
{code}
But it then goes off the rails when beans and/or attributes are without
description:
{code}
...
"name" : "java.lang:type=MemoryPool,name=CMS Old Gen",
"description" : "Information on the management interface of the MBean",
"modelerType" : "sun.management.MemoryPoolImpl",
"name" : "Name",
"description" : "Name",
"value" : "CMS Old Gen",
"name" : "Type",
"description" : "Type",
"value" : "HEAP",
"name" : "Valid",
"description" : "Valid",
"value" : true,
"name" : "Usage",
"description" : "Usage",
"value" : {
},
"name" : "PeakUsage",
"description" : "PeakUsage",
"value" : {
},
"name" : "MemoryManagerNames",
"description" : "MemoryManagerNames",
"value" : [ "ConcurrentMarkSweep" ],
"name" : "UsageThreshold",
"description" : "UsageThreshold",
"value" : 0,
...
{code}
> Add 'description' to bean and attribute output when you do
> /jmx?description=true
> --------------------------------------------------------------------------------
>
> Key: HBASE-12455
> URL: https://issues.apache.org/jira/browse/HBASE-12455
> Project: HBase
> Issue Type: Improvement
> Components: metrics
> Reporter: stack
> Attachments: 12455.txt
>
>
> Its hard figuring what our metrics mean. Each attribute and bean actually has
> a description but its hard to get at. In mission control, etc., you have to
> click on each attribute to see the description. Its painful. Because the
> description is rarely read, they are not as info-full as they could be.
> If you do /jmx in the UI, you get a dump of all beans associated with the
> server but its just the attribute/bean name + value. The description is there
> but its not displayed. We should give option to display descriptions. It
> would be good for those exploring what metrics are available. We actually
> point folks at jvisualvm in the refguide to figure what metrics are
> available. Would be useful if we could point them at something that was
> easier to navigate.
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