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From Mac Fang <mac.fangzhen....@gmail.com>
Subject Re: Weird High Read throuput of SYSTEM.STATS
Date Thu, 13 Apr 2017 05:38:41 GMT
Josh,

Thanks for the reply,
It is a CDH vendor version (4.7.0_1.3.0). Mutations are reasonable when we
do bulk load. Question is why we have the high read load of the
SYSTEM.STATS table.


On Thu, Apr 13, 2017 at 11:42 AM, Josh Elser <josh.elser@gmail.com> wrote:

> What version of Phoenix are you using? (an Apache release? some vendors'
> packaging?)
>
> Academically speaking, when you bulk load some data, the stats table
> should get updated (otherwise the stats are wrong until a compaction
> occurs), but I can't specifically point you at a line of code that is doing
> this (nor am I 100% positive it happens).
>
>
> On Wed, Apr 12, 2017 at 3:12 AM, Mac Fang <mac.fangzhen.dev@gmail.com>
> wrote:
>
>> Hi, Guys,
>>
>>
>> We are notices some weird high read throuput of the HBase,
>>
>> The HBase Read Rate
>>
>>
>> ​
>> And the SYSTEM.STATS Read Rate
>>
>>
>> ​
>> During that time frame, the system did not have a high QPS. However, it
>> did import some data (some millions) data via the "Phoenix Bulk Load".
>>
>> The question is what does phoenix do with the SYSTEM.STATS table when we
>> do "Bulk Load"?
>>
>> We did not find any clues while we looked into the code. Any hints ?
>>
>>
>> --
>> regards
>> macf
>>
>
>


-- 
regards
macf

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