[jira] [Commented] (CASSANDRA-7316) Windows feature parity - lock virtual address space via VirtualLock

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018041#comment-14018041 ] 

Jonathan Ellis commented on CASSANDRA-7316:
-------------------------------------------

We tried it, but it didn't actually increase performance noticeably so we moved on.  (Quite possibly we were just too bottlenecked elsewhere to notice.)  From the swapping perspective, mlockall was more straightforward on Linux than trying to get people to configure shmmax and nr_hugepage correctly ahead of time.

> Windows feature parity - lock virtual address space via VirtualLock
> -------------------------------------------------------------------
>
>                 Key: CASSANDRA-7316
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7316
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Joshua McKenzie
>            Assignee: Ala' Alkhaldi
>            Priority: Minor
>              Labels: Windows, perfomance
>             Fix For: 3.0
>
>
> Similar to mlockall() in CLibrary.java for linux, it would be nice to lock the virtual address space on Windows to prevent page faults.  Reference API:  http://msdn.microsoft.com/en-us/library/windows/desktop/aa366895(v=vs.85).aspx



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