[jira] [Commented] (HBASE-20549) Dead MBean: Hadoop:service=HBase,sub=Memory,name=RegionServer

["Balazs Meszaros (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-20549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531336#comment-16531336 ] 

Balazs Meszaros commented on HBASE-20549:
-----------------------------------------

The mentioned BlockedFlushes, UnblockedFlushes, IncreaseBlockSize, ... are strictly related to the tuner. There isn't any other code which updates those metrics. The only exception is blockCacheSize and memStoreSize metrics, because these metrics are independent from the tuner.

> Dead MBean: Hadoop:service=HBase,sub=Memory,name=RegionServer
> -------------------------------------------------------------
>
>                 Key: HBASE-20549
>                 URL: https://issues.apache.org/jira/browse/HBASE-20549
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: Balazs Meszaros
>            Priority: Major
>             Fix For: 3.0.0
>
>         Attachments: HBASE-20549.master.001.patch, Screen Shot 2018-05-08 at 10.05.57 PM.png
>
>
> I'm studying flushing and blocking memstores. I came across the MBean Hadoop:service=HBase,sub=Memory,name=RegionServer It looks promising with metrics on blocked flush time, etc. See below. All metrics are zero. I tried to get it going. It is connected to the heap tuner facitlity that we might want to turn on. I managed to get the latter going w/ below configs.... (need to dump out more on what this thing is doing because it is tricky enabling it)
> {code:java}
> <configuration>
>   <property>
>     <name>
>   hbase.regionserver.global.memstore.size.min.range
> </name>
> <value>0.39</value>
> </property>
>   <property>
>     <name>
>   hbase.regionserver.global.memstore.size.max.range
> </name>
> <value>0.41</value>
> </property>
>   <property>
>     <name>
> hfile.block.cache.size.max.range
> </name>
> <value>0.41</value>
> </property>
>   <property>
>     <name>
>       hfile.block.cache.size.min.range
> </name>
> <value>0.39</value>
> </property>
> </configuration>
> {code}
> ... but still the metrics are not updated.
> We should make this bean work whether tuning is on or off or remove it.
> !Screen Shot 2018-05-08 at 10.05.57 PM.png|width=440,height=692!



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