deniskuzZ commented on code in PR #5613:
URL: https://github.com/apache/hive/pull/5613#discussion_r1923469043
##########
common/src/java/org/apache/hadoop/hive/conf/HiveConf.java:
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@@ -5734,6 +5734,26 @@ public static enum ConfVars {
+ "a background update happens periodically to report the actual
state of the query"),
HIVE_SCHEDULED_QUERIES_CREATE_AS_ENABLED("hive.scheduled.queries.create.as.enabled",
true,
"This option sets the default behaviour of newly created scheduled
queries."),
+ HIVE_QUERY_HISTORY_SERVICE_ENABLED("hive.query.history.service.enabled",
true,
+ "Whether to start QueryHistoryService in HS2"),
+
HIVE_QUERY_HISTORY_SERVICE_EXPLAIN_PLAN_ENABLED("hive.query.history.service.explain.plan.enabled",
true,
+ "Whether to collect and store explain plan in the query history.
Default is true."),
+
HIVE_QUERY_HISTORY_SERVICE_EXEC_SUMMARY_ENABLED("hive.query.history.service.exec.summary.enabled",
true,
+ "Whether to collect and store execution summary in the query history.
Default is true."),
+
HIVE_QUERY_HISTORY_SERVICE_PERSIST_MAX_BATCH_SIZE("hive.query.history.service.persist.max.batch.size",
200,
+ "The maximum amount of records held in memory " +
+ "before query history service persists them to the target table. "
+
+ "A small value (like 1-5) will lead to more real-time behavior
with the price of small files. " +
+ "Set this to 0 to wait for the records to be persisted
synchronously (not recommended in production)."),
Review Comment:
what is meant under `Set this to 0 to wait for the records to be persisted
synchronously`? persisted in 1 batch?
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