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Cisco IOS XR Getting Started Guide
OL-10957-02
Chapter7 Troubleshooting the Cisco IO SXR So ftware
Memory Warnings in Configuration Sessions
Removing Configurations to Resolve Low-Memory Warnings
To resolve most low-memory problems, you should remove the configurations from the router that are
consuming the most memory. Often, memory problems occur when a large new configuration is added
to the system. The following sections provide information to resolve low-memory issues:
•Clearing a Target Configuration, page 7-11
•Removing Committed Configurations to Free System Memory, page 7-11
•Rolling Back to a Previously Committed Configuration, page 7-12
•Clearing Configuration Sessions, page 7-12

Clearing a Target Configuration

A low-memory warning can occur when a large configuration file is loaded into a target configuration
session. To remove the target configuration, enter the clear command to discard the changes. For
example:
RP/0/RP0/CPU0:router(config)# clear
Caution Committing a target configuration that has caused a low-memory warning can make the system unstable.
Clearing a target configuration is a preventive measure to not let the system go into a worse memory state
due to additional configuration. In addition, all other active configuration sessions can be closed to
minimize the churn.

Removing Committed Configurations to Free System Memory

You can reduce memory usage by removing configurations from the router, as shown in the following
procedure:
Table7-2 Heading Descriptions for show memory Command Output
Heading Description
Physical Memory Amount of physical memory installed on the device.
Application Memory Memory available for the system to use (total memory minus image size,
reserved, IOMem, and flashfsys).
Image Size of the bootable image.
Reserved Reserved for packet memory.
IOMem IO memory—Currently used as a backup for packet m emory.
flashfsys Flash file system memory.
Process and JID Process and job ID.
Address Starting address in memory.
Bytes Size of memory block.
What Block description.