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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-3853) Local Index - Writes to local index are twice as slow as global and get exponentially slower with PHOENIX-3827_v2 patch
Date Tue, 16 May 2017 20:23:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16013051#comment-16013051
] 

James Taylor commented on PHOENIX-3853:
---------------------------------------

Let me work up a new patch for PHOENIX-3827. It looks to me like the allowLocalUpdates boolean
would cause the ParallelWriterIndexCommitter to write the local indexes still (in addition
to them being written through the new mechanism). That would explain the 2x write time.

> Local Index - Writes to local index are twice as slow as global and get exponentially
slower with PHOENIX-3827_v2 patch
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-3853
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3853
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 4.10.0
>         Environment: HBase 1.3.1 4GB heap in local mode
>            Reporter: Mujtaba Chohan
>             Fix For: 4.11.0
>
>         Attachments: batch_time.png
>
>
> HBase 1.3.1 with head of Phoenix 4.x with/without PHOENIX-3827 v2 patch applied. This
is with immutable non-covered local/global index on a single column with varying batch size
when writing data to base table plus index.
> !batch_time.png!
> | Batch Size | Local Index with PHOENIX-3827_v2 patch (sec)| Local Index without PHOENIX-3827_v2.patch
(sec)| Global (sec)| 
> | 100 | 0.02 | 0.03 | 0.013 | 
> | 1000 | 0.3 | 0.3 | 0.13 | 
> | 10000 | 4.3 | 2.6 | 1.3 | 
> | 12500 | 8.1 | 3 | 1.6 | 
> | 15000 | 13.3 | 3.1 | 1.9 | 
> Schema and index
> {noformat}
> CREATE TABLE IF NOT EXISTS T (OID CHAR(15) NOT NULL, PKP CHAR(3) NOT NULL, PIH CHAR(15)
NOT NULL, FD DATE NOT NULL, SB CHAR(15) NOT NULL, BJ CHAR(15), JR VARCHAR, FIELD VARCHAR,
YM VARCHAR, WN VARCHAR, LG VARCHAR, XHJ VARCHAR, HF VARCHAR, GA VARCHAR, MX VARCHAR, NZ DECIMAL,
JV DECIMAL, AG DATE, KV DATE, JK VARCHAR, DK VARCHAR, EU DATE, OE VARCHAR, DV INTEGER, IK
VARCHAR CONSTRAINT PK PRIMARY KEY ( OID, PKP, PIH, FD DESC, SB )) VERSIONS=1,IMMUTABLE_ROWS=true
> CREATE INDEX IF NOT EXISTS IDXT ON T (JV)
> {noformat}
> Data CSV
> https://expirebox.com/download/1cea73af1831b5193f0539d6e3442292.html
> [~rajeshbabu], [~lhofhansl], [~jamestaylor]



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