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Monitoring Memory-Related Resources Used by the System Processes
Purpose
Display the amount of memory-related resources used by system processes. Because the router allocates memory to system processes in chunks, issuing the show processes memory command performs a cleanup process to gather unused, available memory for reallocation.
You can display different output variations by using the application, slot, and virtual-router keywords. In addition, you can combine these keywords in specific ways to display information combinations of application, slot, and virtual router.
The appearance of parentheses in the output is significant. The parentheses indicate “ partial accountability” of the current memory size. In other words, the values are accurate for the row in which they appear, but the memory value used for calculating the sum total for the column may be smaller than the value displayed. This can result in the sum total for the “ current size” column not matching the sum of the values that appear within the column. This disparity can occur under shared memory conditions where a portion of the memory size for one or more of the virtual routers may be accounted for elsewhere, resulting in a lower column total.
Action
To display system memory usage on a per-application basis:
host1#show processes memory application
*** Memory usage summary (by application, 37 total) ***
application: *
router: *current app size utilization headroom ---------- ------- ----------- -------- aaa 98K 3% 100% bgp 90K 28% 100% bridge 1M 4% 100% cli 3K 8% 100% dcm 64K 7% 100% dhcp 644K 0% 100% dns 4K 6% 100% dvmrp 36K 0% 100% ethernet 3K 75% 100% forwarding 20K 50% 100% gplaan 52K 0% 100% igmp 1K 0% 100% . .
To display memory usage for all virtual routers on a per-router basis:
host1#show processes memory virtual-router
*** Memory usage summary (by router, 4 total) ***
application: *
router: *current rtr size utilization headroom --------- ------- ----------- -------- _unassoc_ (40M) 7% 99% default (339K) 23% 100% test (366K) 23% 100% vr5 (327K) 18% 100% --------- ------- ----------- -------- Total: 41M 7% 99%
To display memory usage for each data store associated with the specified router and for the specified application:
host1#show processes memory virtual-router vr5 application ip
*** Memory usage summary (by VRF) ***
application: ip
router: vr5current vrf size utilization headroom --- ------- ----------- -------- vr5 (19K) 48% 100%
Meaning
Table 59 lists the show processes memory command output fields.
Table 59: show processes memory Output Fields
Field Name | Field Description |
|---|---|
Memory usage summary | Statistical information about the memory usage information being displayed |
application | Name of the application being viewed (if applicable); asterisk (*) if no application is specified |
router | Name of the virtual router being viewed (if applicable); asterisk (*) if no virtual router is specified |
app | Application to which the statistics information applies |
rtr | Virtual router to which the statistics information applies |
vrf | Virtual routing and forwarding instance to which the statistics information applies |
_unassoc_ | Special virtual router output category that summarizes all memory that is not currently associated with any particular virtual router |
current size | Amount of memory reserved by the listed application or virtual router |
utilization | Percentage of reserved memory currently used for the listed application or router |
headroom | Amount of memory overage available to each listed application or virtual router (if needed); 100% indicates an unlimited headroom (that is, no memory limits are set for the application or virtual router) |
