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druid/docs/querying
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Gian Merlino 37853f8de4
ConcurrentGrouper: Add mergeThreadLocal option, fix bug around the switch to spilling. (#12513) 
* ConcurrentGrouper: Add option to always slice up merge buffers thread-locally.

Normally, the ConcurrentGrouper shares merge buffers across processing
threads until spilling starts, and then switches to a thread-local model.
This minimizes memory use and reduces likelihood of spilling, which is
good, but it creates thread contention. The new mergeThreadLocal option
causes a query to start in thread-local mode immediately, and allows us
to experiment with the relative performance of the two modes.

* Fix grammar in docs.

* Fix race in ConcurrentGrouper.

* Fix issue with timeouts.

* Remove unused import.

* Add "tradeoff" to dictionary.
 		2022-05-21 10:28:54 -07:00
..
aggregations.md stringFirst and stringLast supported in ingestion (#12466) 2022-04-22 10:28:49 +08:00
caching.md Docs - query caching (#11584) 2022-04-18 17:00:21 +08:00
datasource.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
datasourcemetadataquery.md Refresh query docs. (#9704) 2020-04-15 16:12:20 -07:00
dimensionspecs.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
filters.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
granularities.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
groupbyquery.md ConcurrentGrouper: Add mergeThreadLocal option, fix bug around the switch to spilling. (#12513) 2022-05-21 10:28:54 -07:00
having.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
hll-old.md De-incubation cleanup in code, docs, packaging (#9108) 2020-01-03 12:33:19 -05:00
joins.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
limitspec.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
lookups.md Clarify the use of the Lookup API (#12088) 2022-05-16 07:50:24 -07:00
multi-value-dimensions.md Adding new config for disabling group by on multiValue column (#12253) 2022-02-16 20:53:26 +05:30
multitenancy.md cleaning up and fixing links (#10528) 2020-12-17 13:37:43 -08:00
post-aggregations.md Document expression post-aggregators (#11896) 2022-04-19 10:36:19 +08:00
query-context.md Enable vectorized virtual column processing by default. (#12520) 2022-05-16 15:43:53 +05:30
query-execution.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
querying.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
scan-query.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
searchquery.md fix desc of 'required' for granularity property (#10616) 2020-12-01 18:29:51 -08:00
segmentmetadataquery.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
select-query.md Add "offset" parameter to the Scan query. (#10233) 2020-08-13 14:56:24 -07:00
sorting-orders.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
sql-aggregations.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-api.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-data-types.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-jdbc.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-metadata-tables.md SQL: Add is_active to sys.segments, update examples and docs. (#11550) 2022-05-19 14:23:28 -07:00
sql-multivalue-string-functions.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-operators.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-query-context.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-scalar.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql-translation.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
sql.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
timeboundaryquery.md Refresh query docs. (#9704) 2020-04-15 16:12:20 -07:00
timeseriesquery.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
topnmetricspec.md Sql docs items (#12530) 2022-05-17 16:56:31 -07:00
topnquery.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
troubleshooting.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00
using-caching.md Docs - query caching (#11584) 2022-04-18 17:00:21 +08:00
virtual-columns.md Refactor SQL docs (#12239) 2022-02-11 14:43:30 -08:00