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abhinavmuk04 merged 1 commit into from
Aug 1, 2024
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Include relevant retry info in hbo rst #23335

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5 changes: 4 additions & 1 deletion presto-docs/src/main/sphinx/optimizer/history-based-optimization.rst
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Expand Up @@ -31,14 +31,15 @@ The following configuration properties are available for HBO:

============================================================= =========================================================================================================================== ===================================
Configuration Property Name Description Default value
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``optimizer.use-history-based-plan-statistics`` Use historical statistics for query optimization. ``False``
``optimizer.track-history-based-plan-statistics`` Recording the statistics of the current query as history statistics so as to be used by future queries. ``False``
``optimizer.track-history-stats-from-failed-queries`` Track history based plan statistics from complete plan fragments in failed queries. ``True``
``optimizer.history-based-optimizer-timeout`` Timeout for history based optimizer. ``10 seconds``
``optimizer.treat-low-confidence-zero-estimation-as-unknown`` Treat ``LOW`` confidence, zero estimations as ``UNKNOWN`` during joins. ``False``
``optimizer.confidence-based-broadcast`` Broadcast based on the confidence of the statistics that are being used, by broadcasting the side of a joinNode which ``False``
has the highest confidence statistics. If confidence is the same, then the original behavior will be followed.
``optimizer.retry-query-with-history-based-optimization`` Retry a failed query automatically if HBO can help change the existing query plan ``False``
``hbo.history-matching-threshold`` When the size difference between current table and history table exceeds this threshold, do not match history statistics. ``0.1``
When value is 0.0, only match history statistics when the size of the two are exactly the same.
``hbo.max-last-runs-history`` Number of last runs for which historical stats are stored. ``10``
Expand Down Expand Up @@ -67,6 +68,8 @@ Session property Name Description
``optimizer.treat-low-confidence-zero-estimation-as-unknown`` in the current session. ``optimizer.treat-low-confidence-zero-estimation-as-unknown``
``confidence-based-broadcast`` Overrides the behavior of the configuration property
``optimizer.confidence-based-broadcast`` in the current session. ``optimizer.confidence-based-broadcast``
``retry-query-with-history-based-optimization`` Overrides the behavior of the configuration property
``optimizer.retry-query-with-history-based-optimization`` in the current session. ``optimizer.retry-query-with-history-based-optimization``
=========================================================== ==================================================================================================== ==============================================================

Example
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