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From "Andrey Gura (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-2969) Optimistic transactions support in deadlock detection
Date Mon, 06 Jun 2016 18:11:21 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-2969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316905#comment-15316905
] 

Andrey Gura commented on IGNITE-2969:
-------------------------------------

I ran tests for deadlock detection with pessimistic and optimistic transactions and can conlude
that introducing of timeouts in {{GridDhtTxPrepareFuture}} affects both transactions types
and in some cases lead to problems with transaction finishing.

Also transactions related benchmarks was run in order to check how additional synchronization
in {{GridNearOptimisticTxPrepareFuture}} will affect performance. There is 2-5% perfromance
drop on my lap top (ignite-1.6 vs ignite-2969 branch).

> Optimistic transactions support in deadlock detection
> -----------------------------------------------------
>
>                 Key: IGNITE-2969
>                 URL: https://issues.apache.org/jira/browse/IGNITE-2969
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>            Reporter: Andrey Gura
>            Assignee: Andrey Gura
>             Fix For: 1.7
>
>
> Deadlock detection doesn't support optimistic transactions now. It should be implemented.



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