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https://issues.apache.org/jira/browse/KUDU-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17178138#comment-17178138
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Alexey Serbin commented on KUDU-1587:
-------------------------------------
I implemented the requested functionality with the following changelists:
* [a test scenario to simulate apply queue
"overload"|https://gerrit.cloudera.org/#/c/16312/]
* [tracking the state of the apply queue|https://gerrit.cloudera.org/#/c/16332/]
* [controlling the admission of write requests with CoDel-like
approach|http://gerrit.cloudera.org:8080/16343]
> Memory-based backpressure is insufficient on seek-bound workloads
> -----------------------------------------------------------------
>
> Key: KUDU-1587
> URL: https://issues.apache.org/jira/browse/KUDU-1587
> Project: Kudu
> Issue Type: Bug
> Components: tserver
> Affects Versions: 0.10.0
> Reporter: Todd Lipcon
> Assignee: Alexey Serbin
> Priority: Critical
> Labels: roadmap-candidate
> Attachments: graph.png, queue-time.png
>
>
> I pushed a uniform random insert workload from a bunch of clients to the
> point that the vast majority of bloom filters no longer fit in buffer cache,
> and the compaction had fallen way behind. Thus, every inserted row turns into
> 40+ seeks (due to non-compact data) and takes 400-500ms. In this kind of
> workload, the current backpressure (based on memory usage) is insufficient to
> prevent ridiculously long queues.
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