[teiid-issues] [JBoss JIRA] (TEIID-2404) Expose buffermanager monitoring properties

[Ramesh Reddy (JIRA)]

    [ https://issues.jboss.org/browse/TEIID-2404?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12756339#comment-12756339 ] 

Ramesh Reddy commented on TEIID-2404:
-------------------------------------

Changed to below, but does not look like runtime.totalMemory is reliable.

{code:java}
    private long calculateMaxReserveKB() {
    	if (getMaxReservedKb() < 0) {
           long memoryInGB = Runtime.getRuntime().totalMemory()/(1024*1024);
    	   return new Double(((1024-300) * 0.5) + ((memoryInGB-1) * 1024 * 0.75)).longValue();
    	}
    	return getMaxReservedKb();
    }

    public long getTotalMemoryInUseKB() {
	return bufferMgr.getActiveBatchBytes()/1024 + calculateMaxReserveKB() - bufferMgr.getMaxReserveKB();
    }
    public long getMemoryInUseByActivePlansKB() {
	return ((calculateMaxReserveKB()*1024) - bufferMgr.getReserveBatchBytes())/1024;
    }
{code}
                
> Expose buffermanager monitoring properties
> ------------------------------------------
>
>                 Key: TEIID-2404
>                 URL: https://issues.jboss.org/browse/TEIID-2404
>             Project: Teiid
>          Issue Type: Feature Request
>          Components: Server
>    Affects Versions: 8.3
>            Reporter: Steven Hawkins
>            Assignee: Ramesh Reddy
>             Fix For: 8.3
>
>
> We should expose:
> BufferServiceImpl.getUserBufferSpace - the number of megs currently used by the buffermanager disk storage.
> A rough total of the memory buffer space used can be added, which would be from the BufferFrontedCacheStore concurrent bits set X block size.
> Also the BufferManagerImpl could report the total estimate of objects held in memory.

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