[
https://issues.apache.org/jira/browse/KAFKA-19689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Steven Schlansker updated KAFKA-19689:
--------------------------------------
Summary: TopologyTestDriver spends most of its time forcing changes to disk
with persistent state stores (was: TopologyTestDriver spends most of its time
forcing changes to disk)
> TopologyTestDriver spends most of its time forcing changes to disk with
> persistent state stores
> -----------------------------------------------------------------------------------------------
>
> Key: KAFKA-19689
> URL: https://issues.apache.org/jira/browse/KAFKA-19689
> Project: Kafka
> Issue Type: Improvement
> Components: streams-test-utils
> Affects Versions: 4.1.0
> Reporter: Steven Schlansker
> Priority: Minor
> Attachments: image-2025-09-08-14-07-05-768.png,
> image-2025-09-08-14-22-29-514.png
>
>
> We recently upgraded a Streams app to 4.1.0 and found that our unit and
> integration tests feel like they take much longer and consume more system
> resources. Indeed, when comparing to 4.0.0, it seems there is a significant
> regression in the TopologyTestDriver - with 4.1.0, we spend a ton of time in
> {{Utils.flushDir}} that did not seem to happen in 4.0.0
> It looks like the test driver is syncing the entire state directory to disk
> for every record processed:
> !image-2025-09-08-14-07-05-768.png!
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
