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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