[jira] Resolved: (JCR-2376) Add basic I/O counters to query handler

["Marcel Reutegger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JCR-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marcel Reutegger resolved JCR-2376.
-----------------------------------

       Resolution: Fixed
    Fix Version/s: 2.0.0

Implemented in revision: 831865

There are currently two read counts available in the debug log for QueryResultImpl:
- number of reads to execute the query
- number of reads to retrieve result set

Sample log messages:

QueryResultImpl: query executed in 0 ms (72)
QueryResultImpl: retrieved ScoreNodes in 0 ms (13)

The number in brackets are the number of reads from the index files.

> Add basic I/O counters to query handler
> ---------------------------------------
>
>                 Key: JCR-2376
>                 URL: https://issues.apache.org/jira/browse/JCR-2376
>             Project: Jackrabbit Content Repository
>          Issue Type: New Feature
>          Components: jackrabbit-core
>            Reporter: Marcel Reutegger
>            Priority: Minor
>             Fix For: 2.0.0
>
>
> There should be a couple of simple counters that track the number of I/O operations that are performed during a query execution. This will help debug query performance issues.

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