Low Memory Manager
Below is an explanation of the BlackBerry Low Memory Manager. It kicks in when the memory is low on your BlackBerry device. In the document it also suggests ways to conserve memory:
What is Low Memory Manager?
The Low Memory Manager is activated automatically when the available flash memory on the handheld decreases to less than 400KB. Flash memory is used to store handheld applications such as Messages, Calendar, Address Book, Tasks, Memo Pad, and third party application data.
By removing rarely used applications and old data you can increase the amount of memory on your handheld. The Low Memory Manager begins by removing low priority items such as cached data. Medium priority items such as very old emails and out-of-date calendar entries are deleted if additional memory capacity is required. If the memory situation on the handheld becomes critical, the Low Memory Manager will cause the email application to remove emails on a last-accessed basis.
Note: Calendar entries and emails removed by the Low Memory Manager are not reconciled back to the mail system.
Symptoms:
Call Log Entries and Messages Auto Delete
Lost call log / automatically deleted call log
Lost SMS Text Message / automatically deleted SMS Text Message
BlackBerry Deletes Call Logs
BlackBerry Deletes SMS
Blackberry Deletes Email Messages
Cause:
All RIM BlackBerry devices with handheld software version 4.2 or later utilize Low Memory Manager (LMM). Once the device memory reaches a threshold of 400kb or less, LMM will automatically remove data in order of importance to free up device memory. Once the device has reached full capacity, the device will not be able to store any new data such as SMS text, email, call log entries, etc. This is a list of the items which may be deleted:
* Low Priority: Delete attachment data, browser cache
* Medium Priority: Delete old calendar entries
* High Priority: Delete oldest e-mail messages
NOTE: Saved messages will not be deleted. This list is not complete as there may be other items such as SMS text or call log entries which may be deleted.
Fix:
If the BlackBerry device becomes low on memory, perform the following
1. Check the available memory on the RIM BlackBerry.
2. Configure application options to reduce device memory used:
* Configure Calendar options to keep appointments 60 Days or less.
* Configure Call Logging options to Missed Calls or None.
* Configure Media options for "Device Memory Limit" and "Reserved Picture Memory".
* Configure Message options to keep messages 30 Days or less.
* Configure Picture options to "Store Pictures" to On Media Card.
3. Clear the browser cache and cookies.
4. Transfer media files from the device to the computer.
5. Delete media files, such as music, pictures, ringtones, or video
6. Uninstall or remove programs that are not used often, such as games or third-party applications.
7. Perform a hard reset.
8. Check the available memory after the hard reset.
Remove unused languages
* For RIM BlackBerry devices using Multilanguage Handheld Software version 4.2 or later, perform the following:
o Scroll to and select the BlackBerry Setup icon (to select press the trackball in).
o Scroll to and select the Setup Wizard icon.
o On the "Language Removal" screen, uncheck any languages that will not be used.
o Complete the remainder of the Setup Wizard.
* For RIM BlackBerry devices using Handheld Software version 4.2 or later, uninstall languages using BlackBerry Desktop Manager Application Loader.
If the issue still persists, perform the following, checking the available memory after each step
* Perform a hard reset: remove the battery from the device (while it is still powered on) for 30 seconds, then reinsert.
* Remove Phone Call and SMS log databases from the BlackBerry device using BlackBerry Desktop Manager Backup and Restore.
* Perform an application load to erase all applications and install the latest BlackBerry Handheld Software.
Note:
For more information on LMM see RIM Technical Knowledge Center: KB02843 and KB12383.
