phoenix-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
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 Thu, 18 May 2017 15:06:04 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-3853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015907#comment-16015907
] 

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

Might the cause be that the writes are parallelized through a thread pool in PHOENIX-3827
and executed serially otherwise? We won't have batch sizes above 1000 (due to memory and potential
row lock issues), so I don't think the perf degradation is that important. Have we tested
with lots of concurrency to negate the impact of the thread pool?

> 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_mutable.png, 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]



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message