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https://issues.apache.org/jira/browse/IGNITE-22835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18017702#comment-18017702
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Alexey Scherbakov edited comment on IGNITE-22835 at 9/3/25 1:05 PM:
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To sum it up
# this optimization performs worse on a rocks db log storage and best on logit
log storage.
# It doesn't bring up significant latency improvements: 185 vs 201 microseconds
Currently it can't be enabled due to 1, so I decided to delay patch merging.
We should re-evalute this after merging new log storage [1]
[1] https://issues.apache.org/jira/browse/IGNITE-23240
was (Author: ascherbakov):
To sum it up
# this optimization performs worse on a rocks db log storage and best on logit
log storage.
# It doesn't bring up significant latency improvements: 185 vs 201 microseconds
Currently it can't be enabled due to 1.
We should re-evalute this after merging new log storage [1]
[1] https://issues.apache.org/jira/browse/IGNITE-23240
> Latency penalty for using disruptor threads
> -------------------------------------------
>
> Key: IGNITE-22835
> URL: https://issues.apache.org/jira/browse/IGNITE-22835
> Project: Ignite
> Issue Type: Improvement
> Reporter: Vladislav Pyatkov
> Assignee: Alexey Scherbakov
> Priority: Major
> Labels: ignite-3
> Time Spent: 10m
> Remaining Estimate: 0h
>
> h3. Motivation
> All three disruptors are part of the RAFT implementation. Each time a command
> has to be replicated, all the disruptors are used. This leads to a bad impact
> on the entire operation's latency.
> {noformat}
> onBeforeApplyCmd:%node_3344%JRaft-Request-Processor-3 0.2 5415400 5415600
> Here is hidden 6.1 us
> RaftNodeOnEvent:%node_3344%JRaft-NodeImpl-Disruptor_stripe_2-0 0.0 5421700
> 5421700
> --
> RaftNodeOnEvent:%node_3344%JRaft-NodeImpl-Disruptor_stripe_2-0 0.0 5421700
> 5421700
> Here is hidden 2.8 us
> LogManagerOnEvent:%node_3344%JRaft-LogManager-Disruptor_stripe_2-0 0.1
> 5424500 5424600
> --
> flushLog:%node_3344%JRaft-LogManager-Disruptor_stripe_2-0 18.7 5426400 5445100
> Here is hidden 2.9 us
> FSMCallerOnEvent:%node_3344%JRaft-FSMCaller-Disruptor_stripe_1-0 0.1 5448000
> 5448100
> {noformat}
> h3. Definition of done
> * We can try to use the disruptor wait policy, depending on the case.
> * Maybe we can reduce a number of the dusruptor queues.
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