[jira] [Commented] (HBASE-8450) Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc.

["Lars Hofhansl (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13696108#comment-13696108 ] 

Lars Hofhansl commented on HBASE-8450:
--------------------------------------

I would like to solicit opinions about whether we make some of these config changes in 0.94 as well.

If so, I would suggest the following changes:

+ handlers 30 instead of 10
+ upped memstore lower limit from .35 to .38
+ bulkload retries is 10 instead of infinite
+ blockingstorefiles is 10 instead of 7
+ block cache is 0.4 instead of 0.25

And maybe this:

+ major compactions are now once a week instead of once every 24 hours; they are staggered so all regionservers do not start compacting at the same time

                
> Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc.
> ----------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8450
>                 URL: https://issues.apache.org/jira/browse/HBASE-8450
>             Project: HBase
>          Issue Type: Task
>          Components: Usability
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.95.1
>
>         Attachments: 8450.txt, 8450v2.txt, 8450v3.txt, 8450v5.txt, 8450v5.txt
>
>
> This is a critical task we need to do before we release; review our defaults.
> On cursory review, there are configs in hbase-default.xml that no longer have matching code; there are some that should be changed because we know better now and others that should be amended because hardware and deploys are bigger than they used to be.
> We could also move stuff around so that the must-edit stuff is near the top (zk quorum config. is mid-way down the page) and beef up the descriptions -- especially since these descriptions shine through in the refguide.
> Lastly, I notice that our tgz does not "include" an hbase-default.xml other than the one bundled up in the jar.  Maybe we should make it more accessible.

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