In the previous example, the free processor memory is more than 1MB (1,120,644 bytes) but the largest memory block is only about 58K (58144 bytes).
This indicates the memory is fragmented. This may be caused by a bug. If either the Free(b) or the Largest(b) numbers are low, the show run command output may not be produced due to a lack of available memory to process the command.
Check the logs for %SYS-2-MALLOCFAIL error messages by issuing the show logging command. Note: If logging is enabled for the terminal session, the %SYS-2-MALLOCFAILmessage may show up when the show run command is issued.