[jira] [Commented] (IGNITE-5375) New PersistentStoreMetrics, MemoryMetrics interface improvements

["Dmitriy Setrakyan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IGNITE-5375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032865#comment-16032865 ] 

Dmitriy Setrakyan commented on IGNITE-5375:
-------------------------------------------

Isn't total allocated pages equal to total pages on disk?

> New PersistentStoreMetrics, MemoryMetrics interface improvements
> ----------------------------------------------------------------
>
>                 Key: IGNITE-5375
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5375
>             Project: Ignite
>          Issue Type: Task
>          Components: persistence
>            Reporter: Sergey Chugunov
>             Fix For: 2.1
>
>
> h2. Notes
> Original discussions on dev list: on [Persistent Store Metrics|http://apache-ignite-developers.2346864.n4.nabble.com/Persistent-Distributed-Store-Metrics-tt17730.html]; on a new way of thinking of Memory Policies as [virtual memory|http://apache-ignite-developers.2346864.n4.nabble.com/DISCUSS-Ignite-memory-gt-virtual-memory-tt18291.html].
> Existing {{MemoryMetrics}} interface will be enhanced with additional methods for monitoring persistence activities (only new methods are listed):
> {code}
> public interface MemoryMetrics {
>     ...
>     public long getDirtyPages();
>     public float getPagesReplaceRate();
>     public long getPhysicalMemoryPages();
> }
> {code}
> Proposed interface for Persistent Store Metrics:
> {code}
> public interface PersistentStoreMetrics {
>     public float getWalLoggingRate();
>     public int getWalArchiveSegments();
>     public float getWalFsyncTime();
>     public float getCheckpointingTime();
>     public float getCheckpointingFsyncTime();
>     public long getCheckpointingTotalPagesNumber();
>     public long[] getCheckpointingPagesByTypeNumber();
>     public long getCheckpointingCopiedOnWritePagesNumber();
> }
> {code}
> h2. Acceptance Criteria
> # MemoryMetrics interface is expanded with new methods
> # Persistent Store Metrics are implemented according to the proposed interface
> # Semantics of existing method {{MemoryMetrics::getTotalAllocatedPages}} is changed to return not only pages residing in memory, but total amount of paged including ones on disk. 
> For amount of pages in RAM new method {{getPhysicalMemoryPages}} is added.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)