ignite-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (IGNITE-2408) Hot spot in GridDhtAtomicCache$DeferredResponseBuffer.addResponse()
Date Mon, 01 Feb 2016 07:43:39 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-2408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vladimir Ozerov closed IGNITE-2408.
-----------------------------------

> Hot spot in GridDhtAtomicCache$DeferredResponseBuffer.addResponse()
> -------------------------------------------------------------------
>
>                 Key: IGNITE-2408
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2408
>             Project: Ignite
>          Issue Type: Sub-task
>          Components: cache
>    Affects Versions: 1.5.0.final
>            Reporter: Vladimir Ozerov
>            Assignee: Ilya Lantukh
>            Priority: Critical
>             Fix For: 1.6
>
>
> Problems:
> 1) DeferredResponseBuffer.respVers is ConcurrentLinkedDeque8 and size() method is called
on it. It is O(N) for this collection, hence the hot spot.
> 2) We use read-write lock for very small updates. This is not efficient.
> Probably we should simply switch to (sycnhronized + ArrayList) and this will be enough.

> If synchronized is not an option, at the very least we must use collection with O(1)
size or maintain separate counter (e.g. LongAccumulator).



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message