[jira] [Reopened] (HBASE-24742) Improve performance of SKIP vs SEEK logic

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

     [ https://issues.apache.org/jira/browse/HBASE-24742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Hofhansl reopened HBASE-24742:
-----------------------------------

Lemme put this into branch-2 and master as well.

> Improve performance of SKIP vs SEEK logic
> -----------------------------------------
>
>                 Key: HBASE-24742
>                 URL: https://issues.apache.org/jira/browse/HBASE-24742
>             Project: HBase
>          Issue Type: Bug
>          Components: Performance, regionserver
>    Affects Versions: 3.0.0-alpha-1, 1.7.0, 2.4.0
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Major
>             Fix For: 1.7.0
>
>         Attachments: hbase-1.6-regression-flame-graph.png, hbase-24742-branch-1.txt
>
>
> In our testing of HBase 1.3 against the current tip of branch-1 we saw a 30% slowdown in scanning scenarios.
> We tracked it back to HBASE-17958 and HBASE-19863.
> Both add comparisons to one of the tightest HBase has.
> [~bharathv]



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