BlackBerry smartphones with content protection and memory cleaner turned on may experience slow performance

Article ID: KB19371

Type: Support Content

Last Modified: 12-14-2011

 

Product(s) Affected:

  • BlackBerry Enterprise Server 5
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  • BlackBerry® Device Software 4.5 to 7.0
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When the BlackBerry® Enterprise Server administrator or a BlackBerry smartphone user turns on content protection on the BlackBerry smartphone, the BlackBerry smartphone uses content protection to encrypt user data items.

When a BlackBerry smartphone user or BlackBerry Enterprise Server administrator turns on content protection, the BlackBerry smartphone automatically turns on the memory cleaner function, and the secure garbage collection process of the memory cleaner.
 
If secure garbage collection is turned on, the BlackBerry smartphone overwrites the memory reclaimed by the standard garbage collection process with zeroes, and overwrites the memory freed by the memory cleaner application when it runs. The interaction between the memory cleaner processes and the content protection processes when secure garbage collection is turned on can be processor intensive, and might result in performance issues on the BlackBerry smartphone (in other words, some processes on the BlackBerry smartphone may be slower).

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The BlackBerry smartphone performance might be improved by changing the memory cleaner Idle Timeout value. This decreases the amount of times the memory cleaner process is run on the BlackBerry. 

For BlackBerry smartphones with BlackBerry Device Software 4.5 to 4.7, complete the following steps:

  1. On the BlackBerry smartphone, click Options > Security Options > Memory Cleaning.
  2. In the Idle Timeout field, click 30 Min or higher.

For BlackBerry smartphones with BlackBerry Device Software 5.0, complete the following steps:

  1. On the BlackBerry smartphone, click Options > Security Options > Advanced Security Options > Memory Cleaning.
  2. In the Idle Timeout field, click 30 Min or higher.

For BlackBerry smartphones with BlackBerry Device Software 6.0 to 7.0, complete the following steps:

  1. On the BlackBerry smartphone, click Options > Security Advanced Security Settings> Memory Cleaning.
  2. In the Idle Timeout field, click 30 Min or higher.

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