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Decrease Frequency of Index Merge

Created by: Justin Johns
Created date:
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Problem

In an active case with multiple users coding documents, performance is sluggish and, at times, review is non-responsive.  

 

Resolution

(NOTE: For systems utilizing distributed processing architecture, the ProcessingManager.exe.config (for the DPM) and ProcessingEngine.exe.config (for each DPE) should replace ProcessingHost.exe.config described below.  Systems using distributed processing should NOT have a ProcessingHost.exe.config file.)  

An entry can be made to the ProcessingHost.exe.config file to increase the threshold of indexes, reducing the frequency of index merge.  This config file can be located in the path below.

"[drive]:\Program Files\AccessData\Evidence Processing Engine\<version>\"

The key below should be added with a value of 50 to the <appSettings> section.  This value dictates how many indexes the system will create before it attempts to merge the index down to four.

<add key="IndexDirectories" value="50"/>

Once this key has been added, ProcessingHost.exe (or ProcessingManager.exe and ProcessingEngine.exe for distributed environments) must be restarted for the change to take effect.  Running the Recycle Services script will restart this process.

 

Cause

Coding documents causes reindex jobs to execute, adding the coded data to the indexes.  Index merge (index_merge.exe) will then spawn and reduce the number of indexes to four.  This can cause performance issues and, at times, make review extremely slow or non-responsive.

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Comments

  • Avatar
    Kursad

    Is this file named something else in version 5.6.3 (EP version 10.12x )or named something else if you run distributed processing?

  • Avatar
    Tod Ewasko

    Justin added the distributed question to the article.

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