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https://issues.apache.org/jira/browse/IGNITE-5479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16080410#comment-16080410
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Pavel Tupitsyn commented on IGNITE-5479:
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What is the point of {{DFLT_CHECKPOINTING_PAGE_BUFFER_SIZE}} then? The actual 
value is never used, we just use a reference comparison?

Let's change both setter and getter to {{Long}}, default to null, and state in 
the Javadoc that {{null}} means "automatic buffer size".

> PersistentStoreConfiguration improvements
> -----------------------------------------
>
>                 Key: IGNITE-5479
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5479
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.1
>            Reporter: Pavel Tupitsyn
>            Assignee: Alexey Goncharuk
>            Priority: Blocker
>             Fix For: 2.1
>
>
> Improve {{PersistentStoreConfiguration}} to be consistent with other 
> configuration classes:
> * {{LockWaitTime}} - should be {{long}} and in milliseconds
> * {{getCheckpointingPageBufferSize}} should return {{long}} instead of 
> {{Long}}
> * {{WalFlushFrequency}} - should be {{long}} and in milliseconds
> * {{WalFsyncDelay}}  - should be {{long}} and in milliseconds. Add javadoc.



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