[jira] [Assigned] (PHOENIX-5494) Batched, mutable Index updates are unnecessarily run one-by-one

["Kadir OZDEMIR (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-5494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kadir OZDEMIR reassigned PHOENIX-5494:
--------------------------------------

    Assignee: Kadir OZDEMIR

> Batched, mutable Index updates are unnecessarily run one-by-one
> ---------------------------------------------------------------
>
>                 Key: PHOENIX-5494
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-5494
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Lars Hofhansl
>            Assignee: Kadir OZDEMIR
>            Priority: Major
>              Labels: performance
>         Attachments: Screenshot_20191110_160243.png, Screenshot_20191110_160351.png, Screenshot_20191110_161453.png
>
>
> I just noticed that index updates on mutable tables retrieve their deletes (to invalidate the old index entry) one-by-one.
> For batches, this can be *the* major time spent during an index update. The cost is mostly incured by the repeated setup (and seeking) of the new region scanner (for each row).
> We can instead do a skip scan and get all updates in a single scan per region.
> (Logically that is simple, but it will require some refactoring)
> I won't be getting to this, but recording it here in case someone feels inclined.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)