azagrebin commented on a change in pull request #8459: [FLINK-12476] [State
TTL] Consider setting a default background cleanup strategy in StateTtlConfig
URL: https://github.com/apache/flink/pull/8459#discussion_r285585951
##########
File path: docs/dev/stream/state/state.md
##########
@@ -400,6 +400,37 @@ This option is not applicable for the incremental
checkpointing in the RocksDB s
- For existing jobs, this cleanup strategy can be activated or deactivated
anytime in `StateTtlConfig`,
e.g. after restart from savepoint.
+#### Cleanup in background
+
+Besides cleanup in full snapshot, you also can activate the cleanup in
background. The option will adapt
+all the cleanup strategies with default values. Users who do not need to think
about details or used backend.
+Currently, Flink provide two kind of cleanup strategies in background and the
default config value list below:
+
+This feature can be activated in `StateTtlConfig`:
+
+<div class="codetabs" markdown="1">
+<div data-lang="java" markdown="1">
+{% highlight java %}
+import org.apache.flink.api.common.state.StateTtlConfig;
+ StateTtlConfig ttlConfig = StateTtlConfig
Review comment:
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