Config Router

  • Google Sheets
  • CCNA Online training
    • CCNA
  • CISCO Lab Guides
    • CCNA Security Lab Manual With Solutions
    • CCNP Route Lab Manual with Solutions
    • CCNP Switch Lab Manual with Solutions
  • Juniper
  • Linux
  • DevOps Tutorials
  • Python Array
You are here: Home / Juniper / RMON_EVENT_fpc_high_heap_utilization

RMON_EVENT_fpc_high_heap_utilization

June 3, 2016 by Marques Brownlee

RMON_EVENT_fpc_high_heap_utilization

The problem related to this syslog message is described in the following sections:

The RMON_EVENT_fpc_high_heap_utilization message contains information about a FPC that is experiencing high memory utilization.

An alarm is triggered when the heap utilization crosses a threshold. The message logged will look similar to this:

SNMPD_RMON_EVENTLOG: fpc_high_heap_utilization: <message>

Heap represents a percentage measurement of the FPC’s memory, including memory for the FPC’s kernel and the space available for processing packets. If the percentage is high, it may simply because you are using that much memory. It may also indicate a memory leak, which will continue to use memory until it is exhausted, causing a crash. Because memory leaks can have widely varying causes, it will require further investigation.

The output from show chassis fpc will show the current heap utilization. It is useful to gather this data over time in order to track issues of increasing memory usage. As a general rule, any heap utilization of 80% or less should not be cause for concern. Periodic spikes of over 80% that then return to less are also to be expected. Constant heap utilization of 80% or more is grounds for suspicion of a memory leak. To further investigate, examine the following outputs:

show log messages
show chassis fpc
request pfe execute command "show syslog messages" target fpc0   
request pfe execute command "show nvram" target fpc0   
request pfe execute command "show heap" target fpc0

Note: Replace fpc0 with the FPC that is experiencing the high heap utilization.

These outputs should contain clues that will help determine if there is any hardware issue or software error occurring.

During a maintenance window, perform the following test:

  1. Get the baseline memory usage via the command: show chassis fpc
  2. Restart the FPC.
  3. Monitor the memory usage by running show chassis fpc. If the memory utilization is legitimate, you should see heap utilization return to high levels relatively soon, with the caveat that the traffic using the FPC will have been disconnected, and it may take some time for full utilization to return. If the utilization stays low, but slowly and consistently continues to rise, then we would suspect a memory leak.

Related

Filed Under: Juniper Tagged With: chassisd, FPC, RMON, SNMP, snmpd

Recent Posts

  • How do I give user access to Jenkins?
  • What is docker volume command?
  • What is the date format in Unix?
  • What is the difference between ARG and ENV Docker?
  • What is rsync command Linux?
  • How to Add Music to Snapchat 2021 Android? | How to Search, Add, Share Songs on Snapchat Story?
  • How to Enable Snapchat Notifications for Android & iPhone? | Steps to Turn on Snapchat Bitmoji Notification
  • Easy Methods to Fix Snapchat Camera Not Working Black Screen Issue | Reasons & Troubleshooting Tips to Solve Snapchat Camera Problems
  • Detailed Procedure for How to Update Snapchat on iOS 14 for Free
  • What is Snapchat Spotlight Feature? How to Make a Spotlight on Snapchat?
  • Snapchat Hack Tutorial 2021: Can I hack a Snapchat Account without them knowing?

Copyright © 2023 · News Pro Theme on Genesis Framework · WordPress · Log in