Partial statistics docs and settings #22087
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Looks great! Thanks for all this work! Just a few comments.
| CREATE INDEX ON rides (start_time); | ||
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| Partial statistics are particularly valuable for timestamp columns where workloads commonly access the most recent data: |
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With the WHERE clause, you can specify arbitrary predicates, so the "recency" argument isn't needed here (unlike for USING EXTREMES). Any range of values that was recently updated (even in the middle of the index) can have partial stats collected here.
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@rytaft TFTR and sorry I took a while to get back to this! I revised per your feedback; could you please have another look? |
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DOC-14809
DOC-11635
DOC-10969
DOC-10915
DOC-12760
Improve our partial statistics docs as follows:
CREATE STATISTICSpageThese updates apply to 23.2-26.1, according to the following feature timeline (please call out if incorrect):
enable_create_stats_using_extremes= off (session)USING EXTREMESenabled by defaultenable_create_stats_using_extremes= on (session);optimizer_use_merged_partial_statistics= off (session)sql.stats.automatic_partial_collection.enabled= true;sql.stats.automatic_partial_collection.min_stale_rows= 100;sql.stats.automatic_partial_collection.fraction_stale_rows= 0.05; table-level equivalentsoptimizer_use_merged_partial_statistics= on;sql.stats.automatic_partial_collection.enabled= true;sql.stats.automatic_full_collection.enabled= true; table-level equivalentsWHERE)WHEREDocs to review (v26.1; please use the version dropdown menu to change versions):
CREATE STATISTICS