[jira] [Created] (HBASE-25723) Temporarily remove the trace support for RegionScanner.next

["Duo Zhang (Jira)" <ji...@apache.org>]

Duo Zhang created HBASE-25723:
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             Summary: Temporarily remove the trace support for RegionScanner.next
                 Key: HBASE-25723
                 URL: https://issues.apache.org/jira/browse/HBASE-25723
             Project: HBase
          Issue Type: Sub-task
          Components: scan, tracing
            Reporter: Duo Zhang
            Assignee: Duo Zhang


Please see the test result in HBASE-25658, tracing RegionScanner.next could lead to a 6% performance downgrading even if we do not enable tracing.

I think the problem here is that, a single scan rpc call could lead to a bunch of RegionScanner.next. So if trace is enabled, there will be much more performance impact as we need to store a bunch of spans(maybe this could be limited by some parameters?).

Anyway, let's remove it for now to land the basic trace framework first. Can improve later.



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