What is the Low Memory Manager feature on the BlackBerry smartphone

Article ID: KB02843

Type: Support Content

Last Modified: 09-12-2013


Product(s) Affected:

  • BlackBerry 7 OS and earlier
  • BlackBerry Device Software
  • BlackBerry smartphones

The Low Memory Manager (LMM) is activated automatically when the available flash memory on the BlackBerry smartphone decreases to less than 400 KB. Flash memory is used to store application data from Messages, Calendar, Contacts, Tasks, MemoPad, and third-party applications.

The amount of memory on the BlackBerry smartphone can be increased by removing rarely used applications and old data. The Low Memory Manager begins by removing low priority items such as cached data. Medium priority items, such as very old email messages and out-of-date calendar entries, are deleted if additional memory capacity is required. If the memory situation on the smartphone becomes critical, the Low Memory Manager will cause the email application to remove email messages on a last-accessed basis.

Note: Calendar entries and email messages removed by the Low Memory Manager are not reconciled back to the mail system.

CollapseAdditional Information

To view the available memory on the BlackBerry smartphone, perform the following steps:

For BlackBerry Device Software 5.0 and earlier:

  • Select Options > Status > File Free.

For BlackBerry 6 and 7:

  • Select Options > Device > Device and Status Information.

See KB14320 for more information on how to maximize free space and battery power on the BlackBerry smartphone.


By downloading, accessing or otherwise using the Knowledge Base documents you agree:

   (a) that the terms of use for the documents found at www.blackberry.com/legal/knowledgebase apply to your use or reference to these documents; and

   (b) not to copy, distribute, disclose or reproduce, in full or in part any of the documents without the express written consent of RIM.

Visit the BlackBerry Technical Solution Center at www.blackberry.com/btsc.